Changes for page The FLASH HDF5 structure
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... ... @@ -8,9 +8,9 @@ 8 8 9 9 == General information about HDF5 == 10 10 11 -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:// www.hdfgroup.org/HDF5/||shape="rect"]]11 +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"]] 12 12 13 -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:// support.hdfgroup.org/products/java/hdfview/index.html||shape="rect"]]13 +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"]] 14 14 15 15 For use on the DESY Maxwell or PAL (max-fsc or pal) **hdfview** is available in the xray module : 16 16 {{code language="none"}}> module load xray{{/code}} ... ... @@ -18,9 +18,9 @@ 18 18 19 19 [[Contents>>doc:||anchor="Contents"]] 20 20 21 -== FLASH HDF5 structure == 21 +== The current FLASH HDF5 structure == 22 22 23 -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 organi sed according to train IDs. The general structure is:23 +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: 24 24 25 25 * Electron Diagnostic 26 26 * Photon Diagnostics ... ... @@ -27,24 +27,24 @@ 27 27 * Beamlines 28 28 * Experiment 29 29 * Timing 30 -[[ ~[~[image:url:http://hasfweb.desy.de/pub/Setup/HDF5main/HDF5_structure.jpg~|~|alt="HDF5_structure.jpg" width="700" height="500"~]~]>>attach:HDF5_structure.jpg]]30 +[[image:attach:HDF5_structure.jpg||height="400"]] 31 31 32 -A detail led description of (most) channels can be found in the lower part of the hdf5 viewer:33 -[[ ~[~[image:url:http://hasfweb.desy.de/pub/Setup/HDF5main/HDF5_structure_desc.jpg~|~|alt="HDF5_structure_desc.jpg"width="341" height="413"~]~]>>attach:HDF5_structure_desc.jpg]]32 +A detailed description of (most) channels can be found in the lower part of the hdf5 viewer: 33 +[[image:attach:HDF5_structure_desc.jpg||thumbnail="true" height="250"]] 34 34 35 35 [[Contents>>doc:||anchor="Contents"]] 36 36 37 37 \\ 38 38 39 -== HDF5 example files == 39 +=== HDF5 example files === 40 40 41 41 Here we have a few HDF5 samples (User data combined with Photon diagnostics data) from a few beamtimes showing the different kind options. 42 42 43 - Example1:Images savedatFLASH243 +[[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"]] 44 44 45 45 \\ 46 46 47 -[[~[~[image:attach:image2019-10-2 1_17-2-50.png~|~|thumbnail="true"height="150"~]~]>>url:https://desycloud.desy.de/index.php/s/nyEgeCWJFC4gao2||shape="rect"]]47 +[[~[~[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"]] 48 48 49 49 \\ 50 50 ... ... @@ -54,10 +54,18 @@ 54 54 55 55 \\ 56 56 57 +== The new (starting 2021) HDF5 format == 58 + 59 +Here is [[some documentation on the changes of the HDF5 format>>doc:FLASHUSER.HDF5 format]] that well be available in 2021 (work in progress) 60 + 57 57 \\ 58 58 59 - == Most popular FLASH parameters and their names in HDF5, DOOCS and (raw) DAQ ==63 +\\ 60 60 65 +== Most popular FLASH parameters and their names in HDF5, DOOCS and (raw) DAQ == 66 + 67 +{{id name="DOOCSparameters"/}} 68 + 61 61 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"]]. 62 62 The most common and often used ones are summarized below: 63 63 ... ... @@ -137,23 +137,29 @@ 137 137 \\ 138 138 139 139 140 -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 contact148 +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 141 141 142 142 [[Contents>>doc:||anchor="Contents"]] 143 143 144 144 \\ 145 145 146 -==== Photon Diagnostics SASE ([[GMD>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/gmd_intensity_and_position/index_eng.html||shape="rect"]]) / Spectrometer (FLASH1)====154 +==== Photon Diagnostics SASE ([[GMD>>url:http://photon-science.desy.de/facilities/flash/photon_diagnostics/gmd_intensity_and_position/index_eng.html||shape="rect"]]) ==== 147 147 156 +\\ 157 + 158 +(% style="color: rgb(0,0,0);" %)**Discontinued GMD data recording / evaluation (VME + PhotonFlux ML server)** 159 + 148 148 {{code language="none"}}/FL1/Photon Diagnostic/GMD/Average energy/energy tunnel{{/code}} 149 -//always saved (PBD)// 150 -DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT04/VAL{{/code}} 151 -DAQ channel: {{code language="none"}}PBD.PHFLUX/TUNNEL.ENPULSEIC{{/code}} 152 -desc : calibrated average SASE Energy/pulse measured in the TUNNEL before the attenuator (ion current) 161 +//always saved (PBD)//\\ 162 + 163 +(% style="color: rgb(0,0,0);" %)DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT04/VAL{{/code}} (%%) 164 +(% style="color: rgb(0,0,0);" %)DAQ channel: {{code language="none"}}PBD.PHFLUX/TUNNEL.ENPULSEIC{{/code}}(%%) 165 +desc : calibrated average SASE Energy/pulse measured in the TUNNEL upstream the gas attenuator (ion current) 153 153 units : microJ 154 154 155 155 {{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel{{/code}} 156 -//always saved (PBD)// 169 +//always saved (PBD)// 170 + 157 157 DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT34/VAL{{/code}} 158 158 DAQ channel: {{code language="none"}}PBD.PHFLUX/TUNNEL.ENERGYPULSE.USER{{/code}} 159 159 desc :Energy per pulse Tunnel (from e-) - the values are set to "0" if there was no SASE beam in the FEL ... ... @@ -167,7 +167,8 @@ 167 167 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]]** 168 168 169 169 {{code language="none"}}/FL1/Photon Diagnostic/GMD/Average energy/energy BDA{{/code}} 170 -//always saved (PBD)// 184 +//always saved (PBD)// 185 + 171 171 DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT05/VAL{{/code}} 172 172 DAQ channel: {{code language="none"}}PBD.PHFLUX/BDA.ENPULSEIC{{/code}} 173 173 desc : calibrated average SASE Energy/pulse measured in the BDA (in the experimental hall) after the attenuator (ion current) ... ... @@ -174,7 +174,8 @@ 174 174 units : microJ 175 175 176 176 {{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy BDA{{/code}} 177 -//always saved (PBD)// 192 +//always saved (PBD)// 193 + 178 178 DOOCS prop : {{code language="none"}}TTF2.DAQ/PHFLUX/OUT35/VAL{{/code}} 179 179 DAQ channel: {{code language="none"}}PBD.PHFLUX/BDA.ENERGYPULSE.USER{{/code}} 180 180 desc :Energy per pulse BDA (from e-) - the values are set to "0" if there was no SASE beam in the FEL ... ... @@ -187,6 +187,57 @@ 187 187 desc :Energy per pulse BDA (from e-) - uncorrected values. There are also values saved if there was no beam ... just background noise 188 188 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]]** 189 189 206 +\\ 207 + 208 +(% style="color: rgb(0,0,0);" %)**NEW (2021) GMD data recording / evaluation (MTCA, analog to FLASH2 and XFEL)** 209 + 210 +{{code language="none"}}/FL1/Photon Diagnostic/GMD/Average energy/energy tunnel{{/code}} 211 +//always saved (PBD)// 212 +(% style="color: rgb(0,0,0);" %)DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.PHOTONFLUX/FL1.TUNNEL/PHOTONFLUX.UJ{{/code}} (%%) 213 +(% style="color: rgb(0,0,0);" %)DAQ channel: {{code language="none"}}FLASH.FEL/XGM.PHOTONFLUX/FL1.TUNNEL/PHOTONFLUX.UJ{{/code}} 214 + 215 +desc : calibrated average SASE Energy/pulse measured in the TUNNEL upstream the gas attenuator 216 +units : microJ 217 + 218 +\\ 219 + 220 +{{code language="none"}}/FL1/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel{{/code}} 221 +//always saved (PBD)// 222 + 223 +(% style="color: rgb(0,0,0);" %)DOOCS prop : 224 +{{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}} 225 + 226 +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) 227 +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]]** 228 + 229 +{{info title="GMD pulse resolved data structure"}} 230 +For every pulse in the pulse train the information is saved: 231 + 232 + 233 +1. **Intensity per pulse** (a.u. (more or less µJ )) 234 +1. Intensity per pulse (auxillary GMD) - not used 235 +1. Position horizontal (mm, for a single pulse the position information may be very noisy - talk to your local contact) 236 +1. Position vertical (mm, for a single pulse the position information may be very noisy - talk to your local contact) 237 +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)(%%)) 238 +1. Position horizontal sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise) 239 +1. Position vertical sigma (mm, indicates the error (RMS, sigma) of the measurement according to known uncertainties and signal to noise) 240 +1. Combined warning and error flags 241 + 242 +The pulse energy and the error are plotted for the first bunch of the pulse trains saved in this 243 +file 244 + 245 + 246 +[[image:attach:image2021-2-9_10-51-6.png||height="250"]] 247 + 248 +\\ 249 +{{/info}} 250 + 251 +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 ! 252 + 253 +\\ 254 + 255 +Besides pulse energy the GMD also provides information about the beam position 256 + 190 190 {{code language="none"}}/FL1/Photon Diagnostic/GMD/Beam position/position BDA horizontal{{/code}} 191 191 //always saved (PBD)// 192 192 DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.POSMON/FL1.BDA/IX.POS{{/code}} ... ... @@ -215,6 +215,10 @@ 215 215 desc :Beam position of the photon Beam determined by the GMD (TUNNEL, y=vertical) 216 216 units : mm 217 217 285 +\\ 286 + 287 +==== Spectrometer (FLASH1) ==== 288 + 218 218 {{code language="none"}}/FL1/Photon Diagnostic/Wavelength/Tunnelspectrometer/wavelength{{/code}} 219 219 _always saved (when Spectrum is measured !!) (PBD) _ 220 220 DOOCS prop : {{code language="none"}}TTF2.EXP/PHOTONWL.ML/WAVE_LENGTH/VAL.TD{{/code}} ... ... @@ -298,10 +298,25 @@ 298 298 //always saved (PBD)// 299 299 DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME{{/code}} 300 300 DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/4DBC3.LOW_CHARGE_ARRIVAL_TIME{{/code}} 301 -desc: Electron bunch arrival time measured with the BAM (more or less) before the undulator (pulse resolved data) 302 -units: ps (bigger numbers indicate later arrivaltime of the electrons) 303 -note: besides the arivaltime from FLASH1 there is also the FLASH2/3 electron arrival time saved. [[LINK to detailled 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"]] and to a recent [[talk about the working principle of the BAM>>attach:BAM-basics and outlook-2018_DESY-template_16-9Format.pdf]] 372 +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). 373 +units: ps (bigger numbers indicate later arrivaltime of the electrons) 304 304 375 +{{code language="none"}}/FL1/Electron Diagnostic/BAM/1SFELC/electron bunch arrival time (low charge){{/code}} 376 +//always saved (PBD)// 377 +DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/1SFELC/LOW_CHARGE_ARRIVAL_TIME{{/code}} 378 +DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/1SFELC.LOW_CHARGE_ARRIVAL_TIME{{/code}} 379 +desc: Electron bunch arrival time measured with the BAM before the undulator (pulse resolved data). This one was newly installed in 2020. 380 +units: ps (bigger numbers indicate later arrivaltime of the electrons) 381 + 382 +{{info title="BAM hints"}} 383 +* besides the arrivaltime from FLASH1 there is also the FLASH2/3 electron arrival time saved.In case of doubt ask your local contact 384 +* [[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]] 385 +* [[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"]] 386 +* a recent [[talk about the working principle of the BAM>>attach:BAM-basics and outlook-2018_DESY-template_16-9Format.pdf]] 387 +{{/info}} 388 + 389 +\\ 390 + 305 305 ===== electron beam profile ===== 306 306 307 307 {{code language="none"}}/FL1/Electron Diagnostic/Electron bunch profile/TDS profile{{/code}} ... ... @@ -591,40 +591,37 @@ 591 591 592 592 \\ 593 593 594 -(% style="color: rgb(255,204,0);" %)average Sigma to be included in 595 - 596 -(% style="color: rgb(193,199,208);" %){{code language="none"}}/FL2/Photon Diagnostic/GMD/Average energy/energy tunnel uncertainty{{/code}} (%%) 597 -(% style="color: rgb(193,199,208);" %)//always saved (PBD2)// (%%) 598 -(% style="color: rgb(193,199,208);" %)DOOCS prop : FLASH.FEL/XGM.PHOTONFLUX/FL2.TUNNEL/PHOTONFLUX.UJ.SIGMA (%%) 599 -(% style="color: rgb(193,199,208);" %)DAQ channel: FLASH.FEL/XGM.PHOTONFLUX/FL2.TUNNEL/PHOTONFLUX.UJ.SIGMA (%%) 600 -(% style="color: rgb(193,199,208);" %)desc : This parameter gives an indication of the error of the measurement of the average 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)(%%) 601 -(% style="color: rgb(193,199,208);" %)units : microJ 602 - 603 -\\ 604 - 605 -\\ 606 - 607 607 {{code language="none"}}/FL2/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel{{/code}} 608 608 //always saved (PBD2)// 609 609 DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.TD{{/code}} 610 610 DAQ channel: {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.TD{{/code}} 611 -desc : Energy per pulse measured in the Tunnel (in fro mt of the gas attenuator and the apertures in the Hall)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) 612 612 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]]** 613 613 614 -\\ 687 +{{info title="GMD pulse resolved data structure"}} 688 +For every pulse in the pulse train the information is saved: 689 + 615 615 616 -\\ 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 617 617 618 -{{code language="none"}}/FL2/Photon Diagnostic/GMD/Pulse resolved energy/energy tunnel uncertainty (sigma){{/code}} 619 -//always saved (PBD2)// 620 -DOOCS prop : {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL/INTENSITY.SIGMA.TD{{/code}} 621 -DAQ channel: {{code language="none"}}FLASH.FEL/XGM.INTENSITY/FL2.TUNNEL:4{{/code}} 622 -desc :(% 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)(%%) 623 -units : a.u. (more or less µJ - related to the value of the pulse energy ) 700 +The pulse energy and the error are plotted for the first bunch of the pulse trains saved in this 701 +file 624 624 703 + 704 +[[image:attach:image2021-2-9_10-51-6.png||height="250"]] 625 625 626 -{{code language="none"}}{{/code}} 706 +\\ 707 +{{/info}} 627 627 709 +\\ 710 + 628 628 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 ! 629 629 630 630 \\ ... ... @@ -743,17 +743,30 @@ 743 743 ===== 744 744 arrival time ===== 745 745 829 +{{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 + 746 746 **FL1**{{code language="none"}}//Electron Diagnostic/BAM/4DBC3/electron bunch arrival time (low charge){{/code}} 747 747 //always saved (PBD2)// 748 748 DOOCS prop : {{code language="none"}}FLASH.SDIAG/BAM/4DBC3/LOW_CHARGE_ARRIVAL_TIME{{/code}} 749 749 DAQ channel: {{code language="none"}}FLASH.SDIAG/BAM.DAQ/4DBC3.LOW_CHARGE_ARRIVAL_TIME{{/code}} 750 -desc: Electron bunch arrival time measured with the BAM (moreor less) beforetheundulator (pulse resolved data)840 +desc: Electron bunch arrival time measured with the BAM in the accelerator (pulse resolved data) 751 751 units: ps (bigger numbers indicate later arrivaltime of the electrons) 752 752 753 -The BAM measures the arrivaltime of** FLASH 1 and FLASH2** in the same data set (thus also sorted in at /FL1/ !). The first values are for FLASH1 bunches. 754 -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) ... 843 +\\ 755 755 756 -Docu for BAM: [[LINK to detailled 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"]] and to a recent [[talk about the working principle of the BAM>>attach:BAM-basics and outlook-2018_DESY-template_16-9Format.pdf]] 845 +{{info title="BAM hints"}} 846 +* 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]] 852 +{{/info}} 757 757 758 758 759 759 [[Contents>>doc:||anchor="Contents"]] ... ... @@ -1098,10 +1098,6 @@ 1098 1098 1099 1099 [[Contents>>doc:||anchor="Contents"]] 1100 1100 1101 -=== How to read HDF5 with Python via FLASHH5 === 1102 - 1103 -With [[FlashH5>>doc:FLASHUSER.FLASHH5 for easier access of FLASH's HDF5 files]] we provide h5py based examples to access and evaluate FLASH's HDF5 files. 1104 - 1105 1105 \\ 1106 1106 1107 1107 == HDF5 and DOOCS ==