The FLASH HDF5 structure

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== Contents ==

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== General information about HDF5 ==

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HDF5 is a data format maintained by the HDF group. For detailed general information see [[here~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://portal.hdfgroup.org/display/support||shape="rect"]]

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To download the HDF5 Viewer click [[here~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://portal.hdfgroup.org/display/support/Download+HDFView||shape="rect"]]

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For use on the DESY Maxwell or PAL (max-fsc or pal) **hdfview** is available in the xray module :

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{{code language="none"}}> module load xray{{/code}}

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{{code language="none"}}> hdfview{{/code}}

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[[Contents>>doc:||anchor="Contents"]]

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== The current FLASH HDF5 structure ==

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The photon diagnostic, electron diagnostic and beamline information as well as the information about the pump-probe laser and the infrastructure offered for users (GHz/MHz ADCs) can be included in one HDF5 file which is organized according to train IDs. The general structure is:

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* Electron Diagnostic

* Photon Diagnostics

* Beamlines

* Experiment

* Timing

[[image:attach:HDF5_structure.jpg||height="400"]]

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A detailed description of (most) channels can be found in the lower part of the hdf5 viewer:

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[[image:attach:HDF5_structure_desc.jpg||thumbnail="true" height="250"]]

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[[Contents>>doc:||anchor="Contents"]]

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=== HDF5 example files ===

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Here we have a few HDF5 samples (User data combined with Photon diagnostics data) from a few beamtimes showing the different kind options.

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[[image:attach:image2019-10-21_17-2-50.png||thumbnail="true" width="300"]] [[download HDF5 (Images @ FL2)>>url:https://desycloud.desy.de/index.php/s/nyEgeCWJFC4gao2||shape="rect"]]

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[[~[~[image:attach:image2019-10-22_10-52-27.png~|~|thumbnail="true" width="300"~]~]download HDF5 (GHz ADC and OPIS @ FL2)>>url:https://desycloud.desy.de/index.php/s/AeA2kPNNnZgX95A||shape="rect"]]

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[[Contents>>doc:||anchor="Contents"]]

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== The new (starting 2021) HDF5 format ==

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Here is [[some documentation on the changes of the HDF5 format>>doc:FLASHUSER.HDF5 format]] that well be available in 2021 (work in progress)

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== Most popular FLASH parameters and their names in HDF5, DOOCS and (raw) DAQ ==

The complete list for the relation between DOOCS names and HDF5 names for the recordable parameters can be found in [[DESY's Repository~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://stash.desy.de/projects/CS/repos/pah/browse/src/camp/data/channel2HdfName.dat||shape="rect"]].

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The most common and often used ones are summarized below:

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Note, the HDF group and data set names apply to our HDF tree version since vers. 0.3.0.

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=== FLASH1 ===

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==== Beamline info (FLASH1) ====

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{{code language="none"}}/FL1/Beamlines/Attenuator/pressure{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.FEL/GAS_DOSING/FL1.ATTENUATOR/PRESSURE{{/code}}

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DAQ channel: {{code language="none"}}FLASH.FEL/GAS_DOSING/FL1.ATTENUATOR/PRESSURE{{/code}}

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desc: set pressure in the gas attenuator

units: mbar

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{{code language="none"}}/FL1/Beamlines/BL/Fast shutter/open{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.SIS.FL1FS/BL.SHUTTER/CH00.TD{{/code}}

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DAQ channel: {{code language="none"}}FLASH.FEL/ADC.SIS.FL1FS/BL.SHUTTER{{/code}}

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desc: BL Beamline Fast shutter state

units: none

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{{code language="none"}}/FL1/Beamlines/PG/Fast shutter/open{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.SIS.FL1FS/PG.SHUTTER/CH00.TD{{/code}}

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DAQ channel: {{code language="none"}}FLASH.FEL/ADC.SIS.FL1FS/PG.SHUTTER{{/code}}

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desc: PG Beamline Fast shutter state

units: none

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{{code language="none"}}/FL1/Beamlines/BL/Filters/BL filter wheel/position filter 1{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}TTF2.FEL/BLFILTERS1/FILTER1/FW.MOTOR.POS{{/code}}

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DAQ channel: {{code language="none"}}TTF2.FEL/BLFILTERS1/FILTER1/FW.MOTOR.POS{{/code}}

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desc: Position of the BL filter wheel 1 - to correlate with the filter material please look [[here>>doc:FLASHUSER.jddd-linked help pages.Filter-Units.Filter wheels in FLASH1 and FLASH2.WebHome]]

units: degree

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{{code language="none"}}/FL1/Beamlines/BL/Filters/BL filter wheel/position filter 2{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}TTF2.FEL/BLFILTERS2/FILTER2/FW.MOTOR.POS{{/code}}

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DAQ channel: {{code language="none"}}TTF2.FEL/BLFILTERS2/FILTER2/FW.MOTOR.POS{{/code}}

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desc: Position of the BL filter wheel 2 - to correlate with the filter material please look [[here>>doc:FLASHUSER.jddd-linked help pages.Filter-Units.Filter wheels in FLASH1 and FLASH2.WebHome]]

units: degree

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{{code language="none"}}/FL1/Beamlines/PG/Filters/position filter 1{{/code}}

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//always saved (PBD)//

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DOOCS prop : = TTF2.FEL/BDAF1/BDA.F1/FW.MOTOR.POS=

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DAQ channel: {{code language="none"}}TTF2.FEL/BDAF1/BDA.F1/FW.MOTOR.POS{{/code}}

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desc: Position of the PG filter wheel 1

units: degree

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{{code language="none"}}/FL1/Beamlines/PG/Filters/position filter 2{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}TTF2.FEL/BDAF2/BDA.F2/FW.MOTOR.POS{{/code}}

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DAQ channel: {{code language="none"}}TTF2.FEL/BDAF2/BDA.F2/FW.MOTOR.POS{{/code}}

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desc: Position of the PG filter wheel 2

units: degree

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{{code language="none"}}/FL1/Beamlines/PG/Filters/position filter 3{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}TTF2.FEL/PGFILTERS/PGFILTERS/FW.MOTOR.POS{{/code}}

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DAQ channel: {{code language="none"}}TTF2.FEL/PGFILTERS/PGFILTERS/FW.MOTOR.POS{{/code}}

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desc: Position of the PG filter wheel 3

units: degree

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NOTE: Aperture positions in the beamline as well as the positions of the beam steering mirrors are also saved. For more Info contact your local contact

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[[Contents>>doc:||anchor="Contents"]]

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==== Photon Diagnostics SASE ([[GMD>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/gmd_intensity_and_position/index_eng.html||shape="rect"]]) ====

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(% style="color: rgb(0,0,0);" %)**Discontinued GMD data recording / evaluation (VME + PhotonFlux ML server)**

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Average energy/energy tunnel{{/code}}

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//always saved (PBD)//\\

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(% style="color: rgb(0,0,0);" %)DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT04/VAL{{/code}} (%%)

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(% style="color: rgb(0,0,0);" %)DAQ channel: {{code language="none"}}PBD.PHFLUX/TUNNEL.ENPULSEIC{{/code}}(%%)

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desc : calibrated average SASE Energy/pulse measured in the TUNNEL upstream the gas attenuator (ion current)

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units : microJ

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT34/VAL{{/code}}

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DAQ channel: {{code language="none"}}PBD.PHFLUX/TUNNEL.ENERGYPULSE.USER{{/code}}

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desc :Energy per pulse Tunnel (from e-) - the values are set to "0" if there was no SASE beam in the FEL

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units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) **[[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel (raw){{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT14/VAL{{/code}}

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DAQ channel: {{code language="none"}}PBD.PHFLUX/TUNNEL.ENERGYPULSE.FF{{/code}}

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desc :Energy per pulse Tunnel (from e-) - uncorrected values. There are also values saved if there was no beam ... just background noise

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units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) **[[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Average energy/energy BDA{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT05/VAL{{/code}}

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DAQ channel: {{code language="none"}}PBD.PHFLUX/BDA.ENPULSEIC{{/code}}

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desc : calibrated average SASE Energy/pulse measured in the BDA (in the experimental hall) after the attenuator (ion current)

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units : microJ

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy BDA{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT35/VAL{{/code}}

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DAQ channel: {{code language="none"}}PBD.PHFLUX/BDA.ENERGYPULSE.USER{{/code}}

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desc :Energy per pulse BDA (from e-) - the values are set to "0" if there was no SASE beam in the FEL

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units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision) **[[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy BDA (raw){{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT15/VAL{{/code}}

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DAQ channel: {{code language="none"}}PBD.PHFLUX/BDA.ENERGYPULSE.FF{{/code}}

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desc :Energy per pulse BDA (from e-) - uncorrected values. There are also values saved if there was no beam ... just background noise

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units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision)** [[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

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(% style="color: rgb(0,0,0);" %)**NEW (2021) GMD data recording / evaluation (MTCA, analog to FLASH2 and XFEL)**

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Average energy/energy tunnel{{/code}}

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//always saved (PBD)//

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(% style="color: rgb(0,0,0);" %)DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.PHOTONFLUX/FL1.TUNNEL/PHOTONFLUX.UJ{{/code}} (%%)

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(% style="color: rgb(0,0,0);" %)DAQ channel: {{code language="none"}}FLASH.FEL/XGM.PHOTONFLUX/FL1.TUNNEL/PHOTONFLUX.UJ{{/code}}

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desc : calibrated average SASE Energy/pulse measured in the TUNNEL upstream the gas attenuator

units : microJ

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel{{/code}}

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//always saved (PBD)//

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(% style="color: rgb(0,0,0);" %)DOOCS prop :

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{{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL1.TUNNEL/INTENSITY.TD{{/code}}DAQ channel: {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL1.TUNNEL/INTENSITY.TD{{/code}}

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desc : Energy per pulse measured in the Tunnel. In addition measurement errors and beam position are included for EACH pulse in the pulse train !! (see below)

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units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision)** [[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

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For every pulse in the pulse train the information is saved:

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1. **Intensity per pulse** (a.u. (more or less µJ ))

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1. Intensity per pulse (auxillary GMD) - not used

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1. Position horizontal (mm, for a single pulse the position information may be very noisy - talk to your local contact)

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1. Position vertical (mm, for a single pulse the position information may be very noisy - talk to your local contact)

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1. **Intensity per pulse sigma** (a.u. (more or less µJ ), (% style="color: rgb(0,0,0);" %)This parameter gives an indication of the error of the measurement of the pulse energy. This takes signal to noise, detector resolution, uncertainties in crossection etc into account. (it is NOT the measurement of the statistical fluctuation of the SASE pulses)(%%))

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1. Position horizontal sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise)

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1. Position vertical sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise)

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1. Combined warning and error flags

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The pulse energy and the error are plotted for the first bunch of the pulse trains saved in this

file

[[image:attach:image2021-2-9_10-51-6.png||height="250"]]

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All values for the GMD are also available for the** BDA GMD **which is located in the experimental hall down stream the gas attenuator. If the attenuator is on the ratio between BDA and Tunnel signal shows the attenuation. **BUT NOTE** that the filter units are downstream the GMD. So if filters are used this influence is NOT measured by the GMD BDA !

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Besides pulse energy the GMD also provides information about the beam position

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Beam position/position BDA horizontal{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.BDA/IX.POS{{/code}}

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DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.BDA/IX.POS{{/code}}

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desc :Beam position of the photon Beam determined by the GMD (BDA, x=horizontal)

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units : mm

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Beam position/position BDA vertical{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.BDA/IY.POS{{/code}}

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DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.BDA/IY.POS{{/code}}

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desc :Beam position of the photon Beam determined by the GMD (BDA, y=vertical)

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units : mm

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Beam position/position tunnel horizontal{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.TUNNEL/IX.POS{{/code}}

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DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.TUNNEL/IX.POS{{/code}}

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desc :Beam position of the photon Beam determined by the GMD (TUNNEL, x=horizontal)

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units : mm

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{{code language="none"}}/FL1/Photon Diagnostic/GMD/Beam position/position tunnel vertical{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.TUNNEL/IY.POS{{/code}}

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DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.TUNNEL/IY.POS{{/code}}

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desc :Beam position of the photon Beam determined by the GMD (TUNNEL, y=vertical)

units : mm

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==== Spectrometer (FLASH1) ====

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{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/Tunnelspectrometer/wavelength{{/code}}

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_always saved (when Spectrum is measured !!) (PBD) _

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DOOCS prop : {{code language="none"}}TTF2.EXP/PHOTONWL.ML/WAVE_LENGTH/VAL.TD{{/code}}

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DAQ channel: {{code language="none"}}PBD.PHOTONWL.ML/WAVE_LENGTH{{/code}}

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desc : XUV Spectrum measured with the "tunnel spectrometer"

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units :

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{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/Tunnelspectrometer/wavelength start value{{/code}}

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_always saved (when Spectrum is measured !!) (PBD) _

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DOOCS prop : {{code language="none"}}TTF2.EXP/PBD.PHOTONWL.ML/BSTART/VAL{{/code}}

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DAQ channel: {{code language="none"}}TTF2.EXP/PBD.PHOTONWL.ML/BSTART/VAL{{/code}}

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desc : start value (in nm) for the wavelength axis of the XUV Spectrum measured with the "tunnel spectrometer"

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units : nm

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{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/Tunnelspectrometer/wavelength increment{{/code}}

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_always saved (when Spectrum is measured !!) (PBD) _

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DOOCS prop : ==

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DAQ channel: ==

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desc : increment value (in nm) for each pixel for the wavelength axis of the XUV Spectrum measured with the "tunnel spectrometer"

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units : nm

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{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon energy{{/code}}

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//saved on DEMAND (PBD spectrometer stream)//

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DOOCS prop : ==

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DAQ channel: {{code language="none"}}PBD.PHOTONEN.ML/PHOTON_ENERGY{{/code}}

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desc : XUV Spectrum in eV measured with the "PG2 spectrometer"

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units :

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{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon energy start value{{/code}}

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//saved on DEMAND (PBD spectrometer stream)//

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DOOCS prop : ==

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DAQ channel: ==

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desc : start value (in eV) for the wavelength axis of the XUV Spectrum measured with the "PG2 spectrometer"

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units : eV

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{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon energy increment{{/code}}

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//saved on DEMAND (PBD spectrometer stream)//

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DOOCS prop : ==

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DAQ channel: ==

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desc : increment value (in eV) for each pixel for the wavelength axis of the XUV Spectrum measured with the "PG spectrometer"

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units : eV

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{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon wavelength{{/code}}

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//saved on DEMAND (PBD spectrometer stream)//

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DOOCS prop : ==

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DAQ channel: {{code language="none"}}PHOTONEN.ML/PHOTON_WAVE_LEN{{/code}}

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desc : XUV Spectrum in nm measured with the "PG2 spectrometer"

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units :

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{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon wavelength increment{{/code}}

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//saved on DEMAND (PBD spectrometer stream)//

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DOOCS prop : ==

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DAQ channel: ==

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desc : start value (in nm) for the wavelength axis of the XUV Spectrum measured with the "PG2 spectrometer"

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units : nm

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{{code language="none"}}/FL1/Photon Diagnostic/Wavelength/PG2 spectrometer/photon wavelength start value{{/code}}

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//saved on DEMAND (PBD spectrometer stream)//

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DOOCS prop : ==

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DAQ channel: ==

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desc : increment value (in nm) for each pixel for the wavelength axis of the XUV Spectrum measured with the "PG spectrometer"

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units : nm

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[[Contents>>doc:||anchor="Contents"]]

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==== Electron Beam properties (FLASH1) ====

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===== bunch charge =====

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{{code language="none"}}/FL1/Electron Diagnostic/Bunch charge/after undulator{{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.DIAG/TOROID.ML/12EXP/CHARGE.FLASH1{{/code}}

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DAQ channel: {{code language="none"}}FLASH.DIAG/TOROID/12EXP{{/code}}

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desc: electron bunch charge (FLASH1)

units: nC

=====

arrival time =====

{{code language="none"}}/FL1/Electron Diagnostic/BAM/4DBC3/electron bunch arrival time (low charge){{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME{{/code}}

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DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/4DBC3.LOW_CHARGE_ARRIVAL_TIME{{/code}}

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desc: Electron bunch arrival time measured with the BAM inside the accelerator - however shows a very good correlation to the arrivaltime of the XUV pulses in the experiment (pulse resolved data).

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units: ps (bigger numbers indicate later arrivaltime of the electrons)

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{{code language="none"}}/FL1/Electron Diagnostic/BAM/1SFELC/electron bunch arrival time (low charge){{/code}}

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//always saved (PBD)//

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DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/1SFELC/LOW_CHARGE_ARRIVAL_TIME{{/code}}

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DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/1SFELC.LOW_CHARGE_ARRIVAL_TIME{{/code}}

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desc: Electron bunch arrival time measured with the BAM before the undulator (pulse resolved data). This one was newly installed in 2020.

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units: ps (bigger numbers indicate later arrivaltime of the electrons)

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* besides the arrivaltime from FLASH1 there is also the FLASH2/3 electron arrival time saved.In case of doubt ask your local contact

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* [[Link a collection of papers related to the BAM and the analysis of pump-probe experiments >>doc:FLASHUSER.Additional helpful things.FLASH beamlines and instruments references.WebHome]]

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* [[LINK to detailed infos from MSK (may only work inside DESY network~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:http://www.desy.de/~~mbock/pages/BAM_daq_channel_descriptions.html||shape="rect"]]

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* a recent [[talk about the working principle of the BAM>>attach:BAM-basics and outlook-2018_DESY-template_16-9Format.pdf]]

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===== electron beam profile =====

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{{code language="none"}}/FL1/Electron Diagnostic/Electron bunch profile/TDS profile{{/code}}

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//always saved (PBD) - IF LOLA is ON and ACTIVATED in the PBD DAQ (talk to expert)//

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DOOCS prop : {{code language="none"}}TTF2.DAQ/BEAM.PROF.ML/BEAM.PROF/OUT.PROF.CCCED{{/code}}

396

DAQ channel: {{code language="none"}}PBD.BEAM.PROF.ML/DAQ.OUT.PROF.CCCED{{/code}}

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desc: temporal profile of electron bunch, y axis in Ampers (FLASH1)

units: pixel

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{{code language="none"}}/FL1/Electron Diagnostic/Electron bunch profile/Expert stuff/TDS calibration constant{{/code}}

402

//always saved (PBD) - IF LOLA is ON and ACTIVATED in the PBD DAQ (talk to expert)//

403

DOOCS prop : {{code language="none"}}TTF2.DAQ/BEAM.PROF.ML/BEAM.PROF/CALIB.CONST.T{{/code}}

404

DAQ channel: = PBD.BEAM.PROF.ML/CCT=

405

desc: TDS calibration constant for the x-axis of the profiles: fs per pixel

units: fs per pixel

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{{code language="none"}}/FL1/Electron Diagnostic/Electron bunch profile/TDS profile width rms{{/code}}

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//always saved (PBD) - IF LOLA is ON and ACTIVATED in the PBD DAQ (talk to expert)//

411

DOOCS prop : {{code language="none"}}TTF2.DAQ/BEAM.PROF.ML/BEAM.PROF/SOWS.W.CCTED{{/code}}

412

DAQ channel: {{code language="none"}}PBD.BEAM.PROF.ML/PROFWIDTHCCTED{{/code}}

413

desc: rms pulse width of the measures TDS electron bunch profile

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units: fs

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===== electron bunch energy =====

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{{code language="none"}}/FL1/Electron Diagnostic/Electron energy/average electron energy{{/code}}

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_always saved (PBD)

420

DOOCS prop : {{code language="none"}}TTF2.DAQ/ENERGY.DOGLEG/E_INTRA_MEAN/VAL{{/code}}

421

DAQ channel: {{code language="none"}}PBD.ENERGY.DOGLEG/E_MEAN{{/code}}

422

desc: electron bunch energy (average over the bunch train)

423

units: (% class="twikiNewLink" %)MeV(%%)

424

\\

425

426

{{code language="none"}}/FL1/Electron Diagnostic/Electron energy/pulse resolved energy{{/code}}

427

_always saved (PBD)

428

DOOCS prop : {{code language="none"}}TTF2.DAQ/ENERGY.DOGLEG/E_SPECT/VAL.TD{{/code}}

429

DAQ channel: {{code language="none"}}PBD.ENERGY.DOGLEG/E_SPECT{{/code}}

430

desc: electron bunch energy bunch resolved

431

units: (% class="twikiNewLink" %)MeV

\\

{{code language="none"}}/FL1/Electron Diagnostic/Electron energy/wavelength bunch train average{{/code}}

436

_always saved (PBD)

437

DOOCS prop : {{code language="none"}}TTF2.DAQ/ENERGY.DOGLEG/LAMBDA_MEAN/VAL{{/code}}

438

DAQ channel: {{code language="none"}}PBD.ENERGY.DOGLEG/LAMBDA_MEAN{{/code}}

439

desc: Wavelength calculated by the electron bunch energy (average over the bunch train) (FLASH1)

units: nm

\\

[[Contents>>doc:||anchor="Contents"]]

\\

==== Timing information, rep rate etc. (FLASH1) ====

448

449

===== bunch repetition rate =====

450

451

{{code language="none"}}/FL1/Timing/repetition rate{{/code}}

452

//always saved (PBD)//

453

DOOCS prop : {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/REP_RATE_KHZ.1{{/code}}

454

DAQ channel: {{code language="none"}}TTF2.UTIL/LASER.CONTROL/GUN/PULSE_FREQ{{/code}}

455

desc: repetition rate of the bunches / pulses within the burst (FLASH1)

units: kHz

\\

===== set number of pulses =====

460

461

{{code language="none"}}/FL1/Timing/set number of bunches{{/code}}

462

//always saved (PBD)//

463

DOOCS prop : {{code language="none"}}FLASH.DIAG/TOROID.ML/3GUN/NUMBEROFBUNCHES.FLASH1{{/code}}

464

DAQ channel: {{code language="none"}}TTF2.UTIL/LASER.CONTROL/GUN/PULSE_NUM{{/code}}

465

desc: Number of pulses set at the gun (FLASH1)

466

units:

467

468

===== actual number of pulses =====

469

470

{{code language="none"}}/FL1/Timing/actual number of bunches{{/code}}

471

//always saved (PBD)//

472

DOOCS prop : {{code language="none"}}FLASH.DIAG/TOROID.ML/12EXP/NUMBEROFBUNCHES.FLASH1{{/code}}

473

DAQ channel: {{code language="none"}}TTF2.DIAG/PBD.TOROID.ML/12EXP{{/code}}

474

desc: Number of bunches measured BEHIND the undulator. If pulses are used for diagnostic of the protection system of the accelerator limits the number of bunches to be accelerated this is the actual number that created XUV radiation.The number is calculated by the DAQ middle layer server, (FLASH1)

units:

\\

===== actual pulse pattern recorded after the undulator =====

479

480

{{code language="none"}}/FL1/Timing/Bunch pattern/pattern after undulator{{/code}}

481

//always saved (PBD)//

482

DOOCS prop : {{code language="none"}}TTF2.DIAG/PBD.TOROID.ML/12EXP/CHARGE.TD{{/code}}

483

DAQ channel: {{code language="none"}}TTF2.DIAG/PBD.TOROID.ML/12EXP{{/code}}

484

desc: The bunch pattern as function of time in a burst recorded by toroide diagnostic BEHIND the undulator. (FLASH1)

units:

\\

===== Train ID =====

{{code language="none"}}/Timing/train ID{{/code}}

491

//always saved (PBD)//

492

DOOCS prop : {{code language="none"}}none{{/code}}

493

DAQ channel: {{code language="none"}}none{{/code}}

494

desc: Each 10 Hz burst has its unique train ID. For the HDF5 data set the ID is the same for all parameters with the same index (note camera images may be shifted by 1 ID - talk to the experts !)

units:

\\

===== Train time =====

499

500

{{code language="none"}}/Timing/train time{{/code}}

501

desc:Local time as array of day, hour, minute, second, and centisecond. This data set is meant for visualization purposes only. For correlations use the train ID or the Unix time of the time stamp

units: d h min s cs

\\

{{code language="none"}}/Timing/time stamp{{/code}}

506

desc:first column: Local time in unix time. To get day, hour, minute, second you can use unix: e.g. date ~-~-date='@1553617729' or matlab, python etc

507

second column: microseconds

508

third column: Train ID of FLASH

509

\\

510

511

[[Contents>>doc:||anchor="Contents"]]

\\

==== Pump Probe Laser (FLASH1) ====

516

517

{{code language="none"}}/FL1/Experiment/Pump probe laser/laser attenuation{{/code}}

518

519

//always saved (PBD)//

520

DOOCS prop : {{code language="none"}}TTF2.FEL/PPDELAYCAL/PPDELAYCAL/ROT2.CURRENT{{/code}}

521

DAQ channel: {{code language="none"}}TTF2.FEL/PPDELAYCAL/PPDELAYCAL/ROT2.CURRENT{{/code}}

522

desc: attenuation of the PPLaser (rotation of a waveplate)

523

units : 0 no transmission , 1: full transmission

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/laser delay{{/code}}

528

//always saved (PBD)//

529

DOOCS prop : {{code language="none"}}TTF2.FEL/PPDELAYCAL/PPDELAYCAL/DLY1.CURRENT{{/code}}

530

DAQ channel: {{code language="none"}}TTF2.FEL/PPDELAYCAL/PPDELAYCAL/DLY1.CURRENT{{/code}}

531

desc: delay of the Pump probe laser - measured by the read back position of the motor. only read out every secound ... better use the encoder

532

units : ps ( pos delay means IR comes later)

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/delay line IK220.0/ENC.DELAY{{/code}}

537

//always saved (PBD)//

538

DOOCS prop : {{code language="none"}}TTF2.FEL/DELLINE.ENC/IK220.0/ENC.DELAY{{/code}}

539

DAQ channel: {{code language="none"}}TTF2.FEL/DELLINE.ENC/IK220.0:ENC.DELAY{{/code}}

540

subsystem: {{code language="none"}}DELLINE.ENC{{/code}} desc : delay of the Pump probe laser - measured by an encoder. The position is read out with 10Hz train synchronized and should be used to determine the actual laser delay (the motor position is only read out about every second

541

units : ps ( pos delay means IR comes later)

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/Synchronization/timing jitter RMS GECCO{{/code}}

546

//always saved (PBD)//

547

DOOCS prop : {{code language="none"}}FLASH.SYNC/F1PPL.LASER_LOCK/28C.F1PPL1.CONTROLLER/ADV_CTRL_MANAGER.0.PID_INPUT_JITTER.2.RD{{/code}}

548

DAQ channel: {{code language="none"}}FLASH.SYNC/F1PPL.LASER_LOCK/28C.F1PPL1.CONTROLLER/ADV_CTRL_MANAGER.0.PID_INPUT_JITTER.2.RD{{/code}}

549

desc: rms jitter of the GECCO (% class="twikiNewLink" %)TiSa(%%) Oscillator units: fs

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/streak camera delay time{{/code}}

554

//always saved (PBD)//

555

DOOCS prop : {{code language="none"}}TTF2.FEL/TDOLFEL/TDOLFEL/STREAK.CAM.TIME{{/code}}

556

DOOCS prop : {{code language="none"}}TTF2.FEL/TDOLFEL/TDOLFEL/STREAK.CAM.TIME{{/code}}

557

desc: delaytime between the optical laser and the FEL units: ps

\\

[[Contents>>doc:||anchor="Contents"]]

\\

==== User Data (FLASH1) ====

566

567

The data saved specifically for detectors at an experiment will show up in /Experiment/ there is a large number of options for cameras or monitoring pslow properties (motor positons etc) for user experiments. For details please ask your local contact.

568

569

NOTE: If parameters for an experiment are included on short notice the correct naming in the HDF5 may not be in time and the data will show up in /uncategorized/ with the DOOCS names

570

571

The most common and permanently installed device used by experiment are our ADCs:

===== GHz ADCs =====

ADC traces of the (SPDevices 412) GHZ ADCs available for the users . More information about the ADCs can be found** [[here>>doc:FLASHUSER.Data Acquisition and controls.Controls (DOOCS, jDDD,\.\.\.).MTCA ADCs.WebHome]]**

576

//saved on DEMAND in the user DAQ//

577

\\The HDF5 names for the ADC traces are depending on the beamline :

578

\\PG Beamline:

579

{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH00/TD{{/code}}

580

{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH01/TD{{/code}}

581

{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH02/TD{{/code}}

582

{{code language="none"}}/FL1/Experiment/PG/ADQ412 GHz ADC/CH03/TD{{/code}}

583

584

BL Beamlines:

585

{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH00/TD{{/code}}

586

{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH01/TD{{/code}}

587

{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH02/TD{{/code}}

588

{{code language="none"}}/FL1/Experiment/BL1/ADQ412 GHz ADC/CH03/TD{{/code}}

589

\\{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH00/TD{{/code}}

590

{{code language="none"}}/FL1/Experiment/BL2/ADQ412 GHz ADC/CH01/TD{{/code}}

591

\\{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH02/TD{{/code}}

592

{{code language="none"}}/FL1/Experiment/BL3/ADQ412 GHz ADC/CH03/TD{{/code}}

593

594

DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00/CH00.TD or CH00.DAQ.TD{{/code}}

595

here the {{code language="none"}}CH00.TD{{/code}} is the full ADC trace as it is sampled ( typically several 100.000 samples per pulse train) while the {{code language="none"}}CH00.DAQ.TD{{/code}} trace only has the number of samples which are sent to the DAQ OR if //grouping// is activated the {{code language="none"}}CH00.DAQ.TD{{/code}} conatins only the grouped spectra. To read the ADC trace with an online analysis program the {{code language="none"}}CH00.DAQ.TD{{/code}} is used preferablly.

596

DAQ channel: {{code language="none"}}FLASH.FEL/ADC.ADQ.PG/EXP1.CH00{{/code}}

597

598

In addition there are also additional parameters saved like:

599

600

* {{code language="none"}}sample frequency{{/code}}: it shows the sample frequency in MHz (number of samples per µs). NOTE: the clock of the ADC is NOT synchronized to the FLASH timing system. Thus the number of samples between bunches in the bunch train may be not integer numbers which will be show up for long bunch trains.

601

* {{code language="none"}}number of samples{{/code}}: total number of samoles recorded for each 10 Hz trigger

602

* {{code language="none"}}error (ADC):{{/code}} 0 indicates that there was no error

===== MHz ADCs =====

similar to the GHz ADCs the MHz ADCs are saved with HDF5 names like:

607

{{code language="none"}}/FL1/Experiment/BL1/SIS8300 100MHz ADC/CH2/TD{{/code}}

608

DOOCS prop : FLASH.FEL/ADC.SIS.BL1/EXP1.CH02/CH00.TD

609

DAQ channel: : FLASH.FEL/ADC.SIS.BL1/EXP1.CH02

610

611

In addition there are also additional parameters saved like:

612

613

* {{code language="none"}}sample frequency{{/code}}: it shows the sample frequency in MHz (number of samples per µs). NOTE: the clock of the ADC is NOT synchronized to the FLASH timing system. Thus the number of samples between bunches in the bunch train may be not integer numbers which will be show up for long bunch trains.

614

* {{code language="none"}}number of samples{{/code}}: total number of samoles recorded for each 10 Hz trigger

615

616

[[Contents>>doc:||anchor="Contents"]]

\\

\\

\\

=== FLASH2 ===

There is analog to FLASH1 a permanently running "PhotonDagnostic DAQ FLASH2" (PBD2) and 2 User DAQs

627

628

==== Beamline info (FLASH2) ====

629

630

(% style="color: rgb(255,153,0);" %)(not yet available){{code language="none"}}/FL2/Beamlines/Attenuator/pressure {{/code}}(%%)

631

(% style="color: rgb(193,199,208);" %)//always saved (PBD2)// (%%)

632

(% style="color: rgb(193,199,208);" %)DOOCS prop : {{code language="none"}}FLASH.FEL/ATT.GAS_DOSING/FL2.HALL/PRESSURE{{/code}} (%%)

633

(% style="color: rgb(193,199,208);" %)DAQ channel: {{code language="none"}}FLASH.FEL/ATT.GAS_DOSING/FL2.HALL/PRESSURE{{/code}} (%%)

634

(% style="color: rgb(193,199,208);" %)desc: set pressure in the gas attenuator (%%)

635

(% style="color: rgb(193,199,208);" %)units: mbar(%%)

636

\\

637

638

{{code language="none"}}/FL2/Beamlines/FL20/Shutter/open{{/code}}

639

//always saved (PBD2)//

640

DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.SIS.FL2FS/FL20.SHUTTER/CH00.TD{{/code}}

641

DAQ channel: {{code language="none"}}FLASH.FEL/ADC.SIS.FL2FS/FL20.SHUTTER{{/code}}

642

desc: BL Beamline Fast shutter state: 1 is open, 0 is closed ( for technical reasons there are 100 vales of this state saved ...)

units: none

{{code language="none"}}/FL2/Beamlines/Filter wheel/position wheel 1{{/code}}

647

//always saved (PBD2)//

648

DOOCS prop : {{code language="none"}}FLASH.FEL/FL20H.PH.MOTOR/MOTOR1.MOT3/FPOS{{/code}}

649

DAQ channel: FLASH.FEL/FL20H.PH.MOTOR/MOTOR1.MOT3/FPOS

650

desc: Position of the BL filter wheel 1 - to correlate with the filter material please look **[[here>>doc:FLASHUSER.jddd-linked help pages.Filter-Units.Filter wheels in FLASH1 and FLASH2.WebHome]]**

units: degree

\\

//always saved (PBD2)//

656

\\\\**[[here>>doc:FLASHUSER.jddd-linked help pages.Filter-Units.Filter wheels in FLASH1 and FLASH2.WebHome]]**

657

{{code language="none"}}/FL2/Beamlines/Filter wheel/position wheel 2 DOOCS prop : FLASH.FEL/FL20H.PH.MOTOR/MOTOR2.MOT3/FPOS DAQ channel: FLASH.FEL/FL20H.PH.MOTOR/MOTOR2.MOT3/FPOS desc: Position of the BL filter wheel 2 - to correlate with the filter material please look units: degree{{/code}}

\\

NOTE: Aperture positions in the beamline as well as the positions of the beam steering mirrors are also saved. for more Info contact your local contact

662

663

[[Contents>>doc:||anchor="Contents"]]

\\

\\

==== Photon Diagnostics SASE ([[XGMD>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/gmd_intensity_and_position/index_eng.html||shape="rect"]] - FLASH2) ====

670

671

{{code language="none"}}/FL2/Photon Diagnostic/GMD/Average energy/energy tunnel{{/code}}

672

//always saved (PBD2)//

673

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.PHOTONFLUX/FL2.TUNNEL/PHOTONFLUX.UJ{{/code}}

674

DAQ channel:{{code language="none"}} FLASH.FEL/XGM.PHOTONFLUX/FL2.TUNNEL/PHOTONFLUX.UJ{{/code}}

675

desc : calibrated average ( ~~ 20 sec averaging time ) SASE Energy/pulse measured in the TUNNEL before the attenuator (ion current)

units : microJ

\\

{{code language="none"}}/FL2/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel{{/code}}

681

//always saved (PBD2)//

682

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.TD{{/code}}

683

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.TD{{/code}}

684

desc : Energy per pulse measured in the Tunnel (in front of the gas attenuator and the apertures in the Hall) In addition measurement errors and beam position are included for EACH pulse in the pulse train !! (see below)

685

units : a.u. (more or less µJ but need to be calibrated with the "Average energy" for good precision)** [[see here for help>>doc:FLASHUSER.jddd-linked help pages.Calibrating the pulse resolved (electron) data from GMD.WebHome]]**

686

687

688

For every pulse in the pulse train the information is saved:

689

690

691

1. **Intensity per pulse** (a.u. (more or less µJ ))

692

1. Intensity per pulse (auxillary GMD) - not used

693

1. Position horizontal (mm, for a single pulse the position information may be very noisy - talk to your local contact)

694

1. Position vertical (mm, for a single pulse the position information may be very noisy - talk to your local contact)

695

1. **Intensity per pulse sigma** (a.u. (more or less µJ ), (% style="color: rgb(0,0,0);" %)This parameter gives an indication of the error of the measurement of the pulse energy. This takes signal to noise, detector resolution, uncertainties in crossection etc into account. (it is NOT the measurement of the statistical fluctuation of the SASE pulses)(%%))

696

1. Position horizontal sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise)

697

1. Position vertical sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise)

698

1. Combined warning and error flags

699

700

The pulse energy and the error are plotted for the first bunch of the pulse trains saved in this

file

[[image:attach:image2021-2-9_10-51-6.png||height="250"]]

\\

\\

All values for the GMD are also available for the** HALL GMD **which is located in the experimental hall down stream the gas attenuator. If the attenuator is on the ratio between Hall and Tunnel signal shows the attenuation. **BUT NOTE** that the filter unit and the Aperture 4 are downstream the GMD. So if filters and aperture are used this influence is NOT measured by the GMD hall !

\\

Besides pulse energy the GMD also provides information about the beam position

\\

{{code language="none"}}/FL2/Photon Diagnostic/GMD/Average Beam position/position tunnel horizontal{{/code}}

720

//always saved (PBD2)//

721

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL2.TUNNEL/IX.POS{{/code}}

722

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL2.TUNNEL/IX.POS{{/code}}

723

desc : the Average ( ~~ 20 sec averaging time ) Beam position of the photon Beam determined by the GMD (tunnel, x=horizontal)

units : mm

\\

{{code language="none"}}/FL2/Photon Diagnostic/GMD/Average Beam position/position tunnel vertical{{/code}}

729

//always saved (PBD2)//

730

DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL2.TUNNEL/IY.POS{{/code}}

731

DAQ channel: {{code language="none"}}FLASH.FEL/XGM.POSMON/FL2.TUNNEL/IY.POS{{/code}}

732

desc : the Average ( ~~ 20 sec averaging time ) Beam position of the photon Beam determined by the GMD (tunnel, x=horizontal)

units : mm

\\

//always saved (PBD2)//

739

\\\\{{code language="none"}}/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position tunnel x DOOCS prop : FLASH.FEL/XGM.BPM/FL2.HALL/X.TDDAQ channel: FLASH.FEL/XGM.BPM/FL2.HALL:2 desc: {{/code}}Besides the well calibrated averaged beam position information there is also the option

740

{{code language="none"}}to measure the beam position on a single bunch level. HOWEVER this methide needs a perfectly adjusted signal level (talk to your local contact !!) and also then the signal to noise is rather small and one needs some averaging ... BUT with this option one can determine if there was a spatial slope on a burst (say forst bunches were lower than the last ones or so ...)units : mm {{/code}}

741

742

{{code language="none"}}(x=horizontal, y = vertial){{/code}}

743

744

again the same parameter set is available for the **HALL GMD**

\\

\\

==== Photon Diagnostics OPIS[[ >>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/opis_spectrometer/index_eng.html||shape="rect"]](FLASH2) ====

751

752

for more info see:** [[ OPIS>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/opis_spectrometer/index_eng.html||shape="rect"]]**

753

754

(The OPIS hall is not installed yet ...)

\\

{{code language="none"}}/FL2/Photon Diagnostic/Wavelength/OPIS tunnel/Processed/mean photon energy{{/code}}

759

// saved opon request (PBD2)//

760

DOOCS prop : {{code language="none"}}FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL042{{/code}}

761

DAQ channel:{{code language="none"}} FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL042{{/code}}

762

desc : mean photon energy ( ~~ 1 sec averaging time ) measured in the TUNNEL for a specific bunch out of the bunch train (via photoelectron spectroscopy)

units : eV

\\

{{code language="none"}}/FL2/Photon Diagnostic/Wavelength/OPIS tunnel/Processed/mean wavelength{{/code}}

768

// saved opon request (PBD2)//

769

DOOCS prop : {{code language="none"}}FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL040{{/code}}

770

DAQ channel:{{code language="none"}} FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL040{{/code}}

771

desc : meanwavelength ( ~~ 1 sec averaging time ) measured in the TUNNEL for a specific bunch out of the bunch train (via photoelectron spectroscopy)

units : nm

\\

{{code language="none"}}/FL2/Photon Diagnostic/Wavelength/OPIS tunnel/Processed/number of analyzed bunch (in older version this can be found in OPIS tunnel/Expert stuff/General operation parameters/){{/code}}

777

// saved opon request (PBD2)//

778

DOOCS prop : {{code language="none"}}FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL060{{/code}}

779

DAQ channel:{{code language="none"}} FLASH.UTIL/STORE/FL2.TUNNEL.OPIS/VAL060{{/code}}

780

desc : The bunch number of the bunch used for the wavelength calculation

units :

\\

If Opis is running typically on the the averaged data is saved. For several experiments it may make sense to save the information for each single bunch. This is up to now done by savng the compleate ADC trace of the TOF setup. This is a huge amount of data and needs processing. This has to be performed after the beamtime in close contact to [[Markus Braune>>mailto:markus.braune@desy.de||shape="rect"]] ( respobsible for [[OPIS>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/opis_spectrometer/index_eng.html||shape="rect"]])

\\

In case OPIS was not operating there is still informaton about the **set wavelength** for the undulators (see below) which may differ by up to 5 % from the actual wavelength due to different settings in the FEL ...

\\

\\

==== Electron Beam properties (FLASH2) ====

796

797

===== bunch charge =====

798

799

{{code language="none"}}/FL2/Electron Diagnostic/Bunch charge/after undulator{{/code}}

800

//always saved (PBD2)//

801

DOOCS prop : {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/9FL2BURN/CHARGE.FLASH2{{/code}}

802

DAQ channel: {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/9FL2BURN/CHARGE.FLASH2{{/code}}

803

desc: electron bunch charge FLASH2 (average value for each bunchtrain).

units: nC

\\

===== undulator settings =====

809

810

{{code language="none"}}/FL2/Electron Diagnostic/Undulator setting/set wavelength{{/code}}

811

//always saved (PBD2)//

812

DOOCS prop : {{code language="none"}}TTF2.FEEDBACK/FL2.WAVELENGTHCONTROL/FLASH2/WAVELENGTH{{/code}}

813

DAQ channel: {{code language="none"}}TTF2.FEEDBACK/FL2.WAVELENGTHCONTROL/FLASH2/WAVELENGTH{{/code}}

814

desc: Set value for the anticipated wavelength . This parameter is used to set the undulator gap. It may however deviate from the actual wavelength by several % ...

815

units: nm

816

817

{{code language="none"}}/FL2/Electron Diagnostic/Undulator setting/SASE14 gap{{/code}}

818

//always saved (PBD2)//

819

DOOCS prop : {{code language="none"}}FLASH.UTIL/FL2.UND.MOTOR/FL2SASE14/GAP{{/code}}

820

DAQ channel: {{code language="none"}}FLASH.UTIL/FL2.UND.MOTOR/FL2SASE14/GAP{{/code}}

821

desc: gap value of the undulators. This can be used to follow up how many undulators were closed and if there was a taper

822

units: mm

823

824

The gap values are saved for all 12 undulators (Nr 3 to 14). Undulator 14 is the one closest to the experimental hall.

=====

arrival time =====

{{code language="none"}}/FL2/Electron Diagnostic/BAM/8FL2XTDS/electron bunch arrival time (low charge){{/code}}

830

//always saved (PBD2)//

831

DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/8FL2XTDS/LOW_CHARGE_ARRIVAL_TIME{{/code}}

832

DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/8FL2XTDS.LOW_CHARGE_ARRIVAL_TIME{{/code}}

833

desc: Electron bunch arrival time measured with the BAM after the FLASH2 undulator (pulse resolved data)

834

units: ps (bigger numbers indicate later arrivaltime of the electrons)

835

836

**FL1**{{code language="none"}}//Electron Diagnostic/BAM/4DBC3/electron bunch arrival time (low charge){{/code}}

837

//always saved (PBD2)//

838

DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME{{/code}}

839

DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/4DBC3.LOW_CHARGE_ARRIVAL_TIME{{/code}}

840

desc: Electron bunch arrival time measured with the BAM in the accelerator (pulse resolved data)

841

units: ps (bigger numbers indicate later arrivaltime of the electrons)

\\

* The BAM 4DBC3 measures the arrivaltime of** FLASH 1 and FLASH2** in the same data set (thus also sorted in at /FL1/ !).

847

* The BAM 8FL2XTDS measures only for FLASH2 BUT has the same data structure as the other BAMS ... thus there are also (random) values in in the FLASH1 time slot

848

** Structure: The first values are for FLASH1 bunches. After a gap of about 70 micros ( 70 colums) with as entry for the switching between FLASH 1 and 2 the values for the electrons used in FLASH2 start. The start time of FLASH2 is also recorded in the DAQ. FLASH1 start time is for historic reasons 700. thus if e.g. the start time of FLASH2 ( property name see below) is 1200 it means that FLASH starts at column 500 (1200-700) ... .In case of doubt ask your local contact

849

* [[Link a collection of papers related to the BAM and the analysis of pump-probe experiments >>doc:FLASHUSER.Additional helpful things.FLASH beamlines and instruments references.WebHome]]

850

* [[LINK to detailed infos from MSK (may only work inside DESY network~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:http://www.desy.de/~~mbock/pages/BAM_daq_channel_descriptions.html||shape="rect"]]

851

* a recent [[talk about the working principle of the BAM>>attach:BAM-basics and outlook-2018_DESY-template_16-9Format.pdf]]

[[Contents>>doc:||anchor="Contents"]]

\\

==== Timing information, rep rate etc. (FLASH2) ====

860

861

===== start time of FLASH2 =====

862

863

{{code language="none"}}/FL2/Timing/start time flash2{{/code}}

864

//always saved (PBD2)//

865

DOOCS prop : {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/BUNCH_POSITION.2{{/code}}

866

DAQ channel: {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/BUNCH_POSITION.2{{/code}}

867

desc: The max 600 µs acceleration time of FLASH is devided between FLASH1 and FLASH2. This 600 µs window starts with FLASH1 (up to now) at a time"label" of 700 µs (for historic reasons). Thus the first bunch of FLASH 1 comes at "700" and the last possibel bunch comes at 1300 (700+600). After FLASH1 train is over ther is a about 70µs switching time with no bunches. Then comes the first FLASH2 bunch. Thus if e.g. the start time of FLASH2 is 1200 it means that FLASH2 starts at column 500 (1200-700) in the HDF5 files. (However for yet unknown reasons this may change by 2-3 colums ...)

868

units: µs

869

870

===== bunch repetition rate =====

871

872

{{code language="none"}}/FL2/Timing/repetition rate{{/code}}

873

//always saved (PBD2)//

874

DOOCS prop : {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/REP_RATE_KHZ.2{{/code}}

875

DAQ channel: {{code language="none"}}FLASH.DIAG/TIMER/FLASHCPUTIME1.0/REP_RATE_KHZ.2{{/code}}

876

desc: repetition rate of the bunches / pulses within the burst (FLASH2)

877

units: kHz

878

879

===== actual number of pulses =====

880

881

{{code language="none"}}/FL1/Timing/actual number of bunches{{/code}}

882

//always saved (PBD2)//

883

DOOCS prop : {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/3GUN/NUMBEROFBUNCHES.FLASH2{{/code}}

884

DAQ channel: {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/3GUN/NUMBEROFBUNCHES.FLASH2{{/code}}

885

desc: Number of bunches measured BEHIND the undulator. If pulses are used for diagnostic of the protection system of the accelerator limits the number of bunches to be accelerated this is the actual number that created XUV radiation.The number is calculated by the DAQ middle layer server, (FLASH2)

units:

\\

===== actual pulse pattern recorded after the undulator =====

890

891

{{code language="none"}}/FL1/Timing/Bunch pattern/pattern after undulator{{/code}}

892

//always saved (PBD2)//

893

DOOCS prop : {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/9FL2BURN.PULSEPATTERN{{/code}}

894

DAQ channel: {{code language="none"}}FLASH.DIAG/PBD2.TOROID.ML/9FL2BURN.PULSEPATTERN{{/code}}

895

desc: The bunch pattern as function of time in a burst recorded by toroide diagnostic BEHIND the undulator. (FLASH2)

units:

\\

===== Train ID =====

{{code language="none"}}/Timing/train ID{{/code}}

902

//always saved (PBD2)//

903

DOOCS prop : {{code language="none"}}none{{/code}}

904

DAQ channel: {{code language="none"}}none{{/code}}

905

desc: Each 10 Hz burst has its unique train ID. For the HDF5 dataset the ID is the same for all parameters with the same index (note camera images may be shifted by 1 ID - talk to the experts !)

units:

\\

===== Train time =====

910

911

//always saved (PBD2)

912

//{{code language="none"}}/Timing/train time{{/code}}

913

desc:Local time as array of day, hour, minute, second, and centisecond. This dataset is meant for visualisation purposes only. For correlations use the train ID or the Unix time of the time stamp

units: d h min s cs

\\

{{code language="none"}}/Timing/time stamp{{/code}}

918

919

//always saved (PBD2)//

920

desc: first column: Local time in unix time. To get day, hour, minute, second you can use unix: e.g. date ~-~-date='@1553617729' or matlab, python etc

921

second column: microseconds

922

third column: Train ID of FLASH

923

\\

924

925

[[Contents>>doc:||anchor="Contents"]]

\\

==== User Data (FLASH2) ====

930

931

The data saved specifically for detectors at an experiment will show up in /Experiment/ there is a large number of options for cameras or monitoring pslow properties (motor positons etc) for user experiments. For details please ask your local contact.

932

933

NOTE: If parameters for an experiment are included on short notice the correct naming in the HDF5 may not be in time and the data will show up in /uncategorized/ with the DOOCS names

934

935

The most common and permanently installed device used by experiment are our ADCs:

===== GHz ADCs =====

ADC traces of the (SPDevices 412) GHZ ADCs available for the users . More information about the ADCs can be found** [[here>>doc:FLASHUSER.Data Acquisition and controls.Controls (DOOCS, jDDD,\.\.\.).MTCA ADCs.WebHome]]**

940

//saved on DEMAND in the user DAQ//

941

\\Up to now there are 4 channels available at FL24

942

\\\\{{code language="none"}}/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH00/TD{{/code}}

943

{{code language="none"}}/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH01/TD{{/code}}

944

\\{{code language="none"}}/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH02/TD{{/code}}{{code language="none"}}/FL2/Experiment/MTCA-EXP1/ADQ412 GHz ADC/CH03/TD{{/code}}

\\

DOOCS prop : {{code language="none"}}FLASH.FEL/ADC.ADQ.FL2EXP1/FL2EXP1.CH00/CH00.TD or CH00.DAQ.TD{{/code}}

949

here the {{code language="none"}}CH00.TD{{/code}} is the full ADC trace as it is sampled ( typically several 100.000 samples per pulse train) while the {{code language="none"}}CH00.DAQ.TD{{/code}} trace only has the number of samples which are sent to the DAQ OR if //grouping// is activated the {{code language="none"}}CH00.DAQ.TD{{/code}} conatins only the grouped spectra. To read the ADC trace with an online analysis program the {{code language="none"}}CH00.DAQ.TD{{/code}} is used preferablly.

950

DAQ channel: {{code language="none"}}FLASH.FEL/ADC.ADQ.FL2EXP1/FL2EXP1.CH00{{/code}}

951

952

In addition there are also additional parameters saved like:

953

954

* {{code language="none"}}sample frequency{{/code}}: it shows the sample frequency in MHz (number of samples per µs). NOTE: the clock of the ADC is NOT synchronized to the FLASH timing system. Thus the number of samples between bunches in the bunch train may be not integer numbers which will be show up for long bunch trains.

955

* {{code language="none"}}number of samples{{/code}}: total number of samoles recorded for each 10 Hz trigger

956

* {{code language="none"}}error (ADC):{{/code}} 0 indicates that there was no error

957

* {{code language="none"}}/CH0-CH3/offset{{/code}}: To use the full dynamic range of the ADC one can shift the base line . This offset is saved here.

===== MHz ADCs =====

similar to the GHz ADCs the MHz ADCs are saved with HDF5 names like:

962

{{code language="none"}}/FL2/Experiment/MTCA-EXP1/SIS8300 100MHz ADC/CH2/TD{{/code}}

963

DOOCS prop : FLASH.FEL/ADC.SIS.FL2EXP1/FL2EXP1.CH02/CH00.TD

964

DAQ channel: : FLASH.FEL/ADC.SIS.FL2EXP1/FL2EXP1.CH02

965

966

In addition there are also additional parameters saved like:

967

968

* {{code language="none"}}sample frequency{{/code}}: it shows the sample frequency in MHz (number of samples per µs). NOTE: the clock of the ADC is NOT synchronized to the FLASH timing system. Thus the number of samples between bunches in the bunch train may be not integer numbers which will be show up for long bunch trains.

969

* {{code language="none"}}number of samples{{/code}}: total number of samoles recorded for each 10 Hz trigger

970

971

[[Contents>>doc:||anchor="Contents"]]

\\

\\

==== Pump Probe Laser (FLASH2) ====

978

979

There may be more information available from the "Laser DAQ". laese contact your Laser Local Contact.

980

981

982

{{code language="none"}}/FL2/Experiment/Pump probe laser/FL24/attenuator position{{/code}}//always saved (PBD2)//

983

DOOCS prop : {{code language="none"}}FLASH.FEL/FLAPP2BEAMLINES/MOTOR1.FL24/FPOS{{/code}}

984

DAQ channel: {{code language="none"}}FLASH.FEL/FLAPP2BEAMLINES/MOTOR1.FL24/FPOS{{/code}}

985

desc: attenuation of the PPLaser in the FL24 hutch (rotation of a waveplate)

units : deg.

\\

{{code language="none"}}/FL2/Experiment/Pump probe laser/FL24/polarization position{{/code}}//always saved (PBD2)//

992

DOOCS prop : {{code language="none"}}FLASH.FEL/FLAPP2BEAMLINES/MOTOR2.FL24/FPOS{{/code}}

993

DAQ channel: {{code language="none"}}FLASH.FEL/FLAPP2BEAMLINES/MOTOR2.FL24/FPOS{{/code}}

994

desc: attenuation of the PPLaser in the FL24 hutch (rotation of a waveplate)

units : deg.

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/laser delay readback{{/code}}

1000

//always saved (PBD2)//

1001

DOOCS prop : {{code language="none"}}FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/FMC0.MD22.0.POSITION.RD{{/code}}

1002

DAQ channel: {{code language="none"}}FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/FMC0.MD22.0.POSITION.RD{{/code}}

1003

desc: delay of the Pump probe laser - measured by the read back position of the motor. There is also the set value available ( upto now these values are only updating every 1-2 seconds. There is no fast encoder property as on FLASH1 available)

units : ps )

\\

{{code language="none"}}/FL1/Experiment/Pump probe laser/Synchronization/timing jitter RMS{{/code}}

1009

//always saved (PBD)//

1010

DOOCS prop : {{code language="none"}}FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/CURRENT_INPUT_JITTER.RD{{/code}}

1011

DAQ channel: {{code language="none"}}FLASH.SYNC/LASER.LOCK.EXP/FLASH2.PPL1.OSC1/CURRENT_INPUT_JITTER.RD{{/code}}

1012

desc: rms jitter of the fs-Oscillator

1013

units: fs

1014

1015

[[Contents>>doc:||anchor="Contents"]]

\\

=== "/uncategorized/" ===

1020

1021

If parameters for an experiment are included on short notice the correct naming in the HDF5 may not be in time and the data will show up in /uncategorized/ with their DOOCS names

\\

=== HDF5 structure revisions ===

1026

1027

Starting with Beamblock 4, August 2018, the hierarchy of the HDF group names have been adapted to reflect the new situation at FLASH. FLASH2 is operating for users quite some time now. Therefore, both accelerators appear equally in their respective HDF groups, namely "/FL1" and "/FL2". The root group of proper, by run organised HDF files have an attribute called "version". This version attribute has changed from "0.2.x" to "0.3.x". The changes in detail:

\\

* All FLASH1 related HDF groups moved to group "/FL1", i.e. a new prefix "/FL1" is added to their HDF path.

1032

* The ambigious term "pulse" has been replaced by "train" to refer to "pulse train". Most notably, the dataset "/Timing/pulse ID" has changed to "/Timing/train ID".

1033

* A number of inconsistent names have been streamlined. The relevant changes are listed in the following table.

\\

(% class="wrapped" %)

1038

|=(((

1039

earlier HDF path (vers. 0.2)

)))|=(((

is now (vers. 0.3)

)))

|(((

/Photon Diagnostic/GMD/Beam position/position BDA x

1045

)))|(((

1046

/FL1/Photon Diagnostic/GMD/Beam position/position BDA horizontal

1047

)))

1048

|(((

1049

/Photon Diagnostic/GMD/Beam position/position BDA y

1050

)))|(((

1051

/FL1/Photon Diagnostic/GMD/Beam position/position BDA vertical

1052

)))

1053

|(((

1054

/Photon Diagnostic/GMD/Beam position/position tunnel x

1055

)))|(((

1056

/FL1/Photon Diagnostic/GMD/Beam position/position tunnel horizontal

1057

)))

1058

|(((

1059

/Photon Diagnostic/GMD/Beam position/position tunnel y

1060

)))|(((

1061

/FL1/Photon Diagnostic/GMD/Beam position/position tunnel vertical

1062

)))

1063

|(((

1064

/Experiment/Pump probe laser/BPM/position x

1065

)))|(((

1066

/FL1/Experiment/Pump probe laser/BPM/position horizontal

1067

)))

1068

|(((

1069

/Experiment/Pump probe laser/BPM/position y

1070

)))|(((

1071

/FL1/Experiment/Pump probe laser/BPM/position vertical

1072

)))

1073

|(((

1074

/FL2/Photon Diagnostic/GMD/Beam position/Average/position hall horizontal

1075

)))|(((

1076

/FL2/Photon Diagnostic/GMD/Average beam position/position hall horizontal

1077

)))

1078

|(((

1079

/FL2/Photon Diagnostic/GMD/Beam position/Average/position hall vertical

1080

)))|(((

1081

/FL2/Photon Diagnostic/GMD/Average beam position/position hall vertical

1082

)))

1083

|(((

1084

/FL2/Photon Diagnostic/GMD/Beam position/Average/position tunnel horizontal

1085

)))|(((

1086

/FL2/Photon Diagnostic/GMD/Average beam position/position tunnel horizontal

1087

)))

1088

|(((

1089

/FL2/Photon Diagnostic/GMD/Beam position/Average/position tunnel vertical

1090

)))|(((

1091

/FL2/Photon Diagnostic/GMD/Average beam position/position tunnel vertical

1092

)))

1093

|(((

1094

/FL2/Photon Diagnostic/GMD/Average energy/hall

1095

)))|(((

1096

/FL2/Photon Diagnostic/GMD/Average energy/energy hall

1097

)))

1098

|(((

1099

/FL2/Photon Diagnostic/GMD/Average energy/hall (raw)

1100

)))|(((

1101

/FL2/Photon Diagnostic/GMD/Average energy/energy hall (raw)

1102

)))

1103

|(((

1104

/FL2/Photon Diagnostic/GMD/Average energy/tunnel

1105

)))|(((

1106

/FL2/Photon Diagnostic/GMD/Average energy/energy tunnel

1107

)))

1108

|(((

1109

/FL2/Photon Diagnostic/GMD/Average energy/tunnel (raw)

1110

)))|(((

1111

/FL2/Photon Diagnostic/GMD/Average energy/energy tunnel (raw)

1112

)))

1113

|(((

1114

/FL2/Photon Diagnostic/GMD/Beam position/Pulse resolved/hall x

1115

)))|(((

1116

/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position hall horizontal

1117

)))

1118

|(((

1119

/FL2/Photon Diagnostic/GMD/Beam position/Pulse resolved/hall y

1120

)))|(((

1121

/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position hall vertical

1122

)))

1123

|(((

1124

/FL2/Photon Diagnostic/GMD/Beam position/Pulse resolved/tunnel x

1125

)))|(((

1126

/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position tunnel horizontal

1127

)))

1128

|(((

1129

/FL2/Photon Diagnostic/GMD/Beam position/Pulse resolved/tunnel y

1130

)))|(((

1131

/FL2/Photon Diagnostic/GMD/Pulse resolved beam position/position tunnel vertical

)))

\\

[[Contents>>doc:||anchor="Contents"]]

\\

== Example code showing how to access HDF5 files ==

\\

=== Samples how to read HDF5 with Matlab ===

1145

1146

The examples apply to HDF files with HDF tree version before vers. 0.3.0.

1147

1148

(% style="color: rgb(0,128,0);" %)%% read in the needed data p=path; path(p,'D:\mess-daten\DAQ-data\hdf5\Gotthard') % add the actual folder to the path hdf5file='FLASH1_EXP-2016-03-16T1420.h5'; % data with Gotthard and VLS

1149

1150

(% style="color: rgb(0,128,0);" %)% h5disp(hdf5file,'/','min') % to get an idea what is in the file % h5info(hdf5file,'/Experiment/Gotthard1/BL.0') % get info about the individual channel

1151

1152

(% style="color: rgb(0,128,0);" %)% read a Number per 10 Hz pulse train:

(% class="code" %)

(((

FEL_Wavelength_energy_server=h5read(hdf5file,'/Photon Diagnostic/Wavelength/Calculated by energy/wavelength' );

1157

)))

1158

1159

(% style="color: rgb(0,128,0);" %)% read in a 1D array (spectrum) %GMD data GMD_Spectrum=h5read(hdf5file,'/Photon Diagnostic/GMD/Pulse resolved energy/energy BDA');

1160

1161

(% style="color: rgb(0,128,0);" %)% This reads in all the data . One can also limit the amount of data read to a subset of the data stored in the file. e.g. for image Data (Gotthard)

\\

(% class="code" %)

(((

Start_event= 500 ; % define the first 10 Hz event

1168

Number_of_events = 20; % how many 10 Hz events to load

1169

)))

1170

1171

(% style="color: rgb(0,128,0);" %)% read only part of the data:

(% class="code" %)

(((

Gotthard_data=h5read(hdf5file,'/Experiment/Gotthard1/BL.0',[2 650 Start_event],[50 85 Number_of_events]);

1176

)))

1177

1178

(% style="color: rgb(0,128,0);" %)% start stop increment "manual" for 2 D data : [start bunch number in Gotthard data start pixelin spectrum start sample in 10 Hz trains], % [number of bunches in the Gotthard data number of points in the spectrum number of spectra ]

(% class="code" %)

(((

VLS_Spectrum=h5read(hdf5file,'/Photon Diagnostic/Wavelength/VLS online spectrometer/PCO.ROI.X',[400 Start_event],[200 Number_of_events] );

)))

(% style="color: rgb(0,128,0);" %)% start stop increment "manual" for 1D data : [start sample in the spectrum start sample in 10 Hz trains],[number of points in the spectrum number of spectra ]

1187

1188

(% style="color: rgb(0,128,0);" %)%GMD data

(% class="code" %)

(((

GMD_Spectrum=h5read(hdf5file,'/Photon Diagnostic/GMD/Pulse resolved energy/energy BDA',[1 Start_event],[40 Number_of_events] );

1193

)))

1194

1195

[[Contents>>doc:||anchor="Contents"]]

\\

== HDF5 and DOOCS ==

Here is an outdated [[list with the available properties that are always saved (PBD) for FLASH1 as>>attach:FLASH1__DaqChannel2HdfNamePbd.xlsx]] HDF5 names and the corresponding DOOCS names

1202

1203

[[Contents>>doc:||anchor="Contents"]]

Wiki source code of The FLASH HDF5 structure