Changes for page DAQ and data analysis

Last modified by sndueste on 2025/02/05 14:56
From version 6.1
edited by sendels
on 2019/05/15 16:23
Change comment: There is no comment for this version
To version 3.1
edited by sendels
on 2019/05/15 16:07
Change comment: There is no comment for this version

Summary

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Content
... ... @@ -63,8 +63,8 @@
63 63  
64 64  [[image:url:http://hasfweb.desy.de/pub/Setup/Index/it-infrastructure2.png||alt="it-infrastructure2.png" width="800" height="393"]]
65 65  
66 -The FLASH control & DAQ system supports [[several devices>>doc:FLASHUSER.Data Acquisition and controls.Controls (DOOCS, jDDD,\.\.\.).DOOCS Device Support.WebHome]] and at each beamline are [[doc:FLASHUSER.Data Acquisition and controls.Controls (DOOCS, jDDD,\.\.\.).MTCA ADCs.WebHome]] available. With the MTCA technology it is possible to [[synchronize own devices in respect to the FEL>>doc:FLASHUSER.Data Acquisition and controls.Controls (DOOCS, jDDD,\.\.\.).Trigger Howto.WebHome]].
67 -If the user is using his or her own DAQ system it is further possible to [[receive the trainId via network>>doc:FLASHUSER.TrainID]] for the purpose of synchronization.
66 +The FLASH control & DAQ system supports [[several devices>>doc:FLASHUSER.Data Acquisition and controls.Controls (DOOCS, jDDD,\.\.\.).DOOCS Device Support.WebHome]] and at each beamline are [[doc:FLASHUSER.Data Acquisition and controls.Controls (DOOCS, jDDD,\.\.\.).MTCA ADCs.WebHome]] available. With the MTCA technology it is possible to [[synchronize own devices in respect to the FEL>>url:http://hasfweb.desy.de/bin/view/Setup/TriggerHowto||shape="rect" class="twikiLink"]].
67 +If the user is using his or her own DAQ system it is further possible to [[receive the trainId via network>>url:http://hasfweb.desy.de/bin/view/Setup/TrainID||shape="rect" class="twikiLink"]] for the purpose of synchronization.
68 68  
69 69  \\
70 70  
... ... @@ -98,7 +98,7 @@
98 98  [[image:url:http://hasfweb.desy.de/pub/Setup/Index/timescale_dataAccess.png||alt="timescale_dataAccess.png" width="1000" height="539"]]
99 99  
100 100  At the Free-electron Laser Hamburg ( [[FLASH~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://flash.desy.de/||shape="rect"]]) we use the Distributed Object Oriented Control System ( [[DOOCS~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:http://tesla.desy.de/doocs/doocs.html||shape="rect"]]). Devices are implemented via DOOCS server and via an API ( [[ONLINE>>url:http://hasfweb.desy.de/bin/view/Setup/OnlineAPIs||shape="rect" class="twikiLink"]]) it is possible to request data directly from the DOOCS server by knowing the DOOCS address.
101 -As correlations of different physical properties are often required all data at FLASH are indexed by the [[trainID>>doc:FLASHUSER.TrainID]], which identify each of FLASH's pulse trains. The during a beamtime recorded data are stored via a Data Acquisition System ( [[DAQ>>doc:FLASHUSER.Information about the FLASH DAQ system]]) which sort all events from the individual DOOCS server by trainID. When requested [[HDF files>>doc:FLASHUSER.Information about the FLASH HDF5 structure]] are created after the beamtime which includes the important data from [[the accelerator and its diagnostic>>doc:FLASHUSER.PBD DAQ]] as well as the data created by the [[users>>doc:FLASHUSER.Description of the Properties in the FLASH1_USER1, 2 and 3 for FLASH1 Users]]. This time scale we define as {{code language="none"}}offline{{/code}} as the HDF files are converted after the beamtime is over. For synchronous data during an experiment it is possible to create shorter HDF slices via a {{code language="none"}}nearOnline{{/code}} converter within a few minutes. For working with this partially incomplete HDF slices we provide an API called [[BeamtimeDaqAccess>>doc:FLASHUSER.Beamtime DAQ Access]]. Reading synchronous data via an {{code language="none"}}online{{/code}} API is possible via a configurable DAQ middle layer server, the [[DAQmonitor>>doc:AIDA2020ESST.DAQ Monitor]], which feeds the correlated data back in the control system while it provides a ring buffer with 32 events in size.
101 +As correlations of different physical properties are often required all data at FLASH are indexed by the [[trainID>>url:http://hasfweb.desy.de/bin/view/Setup/TrainID||shape="rect" class="twikiLink"]], which identify each of FLASH's pulse trains. The during a beamtime recorded data are stored via a Data Acquisition System ( [[DAQ>>url:http://hasfweb.desy.de/bin/view/Setup/DAQmain||shape="rect" class="twikiLink"]]) which sort all events from the individual DOOCS server by trainID. When requested [[HDF files>>url:http://hasfweb.desy.de/bin/view/Setup/HDF5main||shape="rect" class="twikiLink"]] are created after the beamtime which includes the important data from [[the accelerator and its diagnostic>>url:http://hasfweb.desy.de/bin/view/Setup/DAQPbdDescription||shape="rect" class="twikiLink"]] as well as the data created by the [[users>>url:http://hasfweb.desy.de/bin/view/Setup/DAQExp2Description||shape="rect" class="twikiLink"]]. This time scale we define as {{code language="none"}}offline{{/code}} as the HDF files are converted after the beamtime is over. For synchronous data during an experiment it is possible to create shorter HDF slices via a {{code language="none"}}nearOnline{{/code}} converter within a few minutes. For working with this partially incomplete HDF slices we provide an API called [[BeamtimeDaqAccess>>url:http://hasfweb.desy.de/bin/view/Setup/BeamtimeDaqAccess||shape="rect" class="twikiLink"]]. Reading synchronous data via an {{code language="none"}}online{{/code}} API is possible via a configurable DAQ middle layer server, the [[DAQmonitor>>url:http://hasfweb.desy.de/bin/view/Setup/ConfigureDAQmonitor||shape="rect" class="twikiLink"]], which feeds the correlated data back in the control system while it provides a ring buffer with 32 events in size.
102 102  
103 103  \\
104 104  
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126 126  
127 127  == Online ==
128 128  
129 -To monitor individual parameters online, e.g. ADCs or cameras, the use of jddd is recommended. For more complex tasks the users can use the DOOCS client API for [[Matlab>>doc:FLASHUSER.Data Acquisition and controls.Data Access at FLASH (DAQ, gpfs,\.\.\.).Online data analysis.MatlabDOOCS.WebHome]], [[Python>>doc:FLASHUSER.Data Acquisition and controls.Data Access at FLASH (DAQ, gpfs,\.\.\.).Online data analysis.PythonDOOCS.WebHome]] and [[Labview>>doc:FLASHUSER.How to read and write DOOCS properties with LABVIEW]]. For accessing the control system [[DOOCS addresses>>doc:FLASHUSER.Information about the FLASH HDF5 structure]] are required.
129 +To monitor individual parameters online, e.g. ADCs or cameras, the use of jddd is recommended. For more complex tasks the users can use the DOOCS client API for [[Matlab>>url:http://hasfweb.desy.de/bin/view/Setup/MatlabDOOCS||shape="rect" class="twikiLink"]], [[Python>>url:http://hasfweb.desy.de/bin/view/Setup/PythonDOOCS||shape="rect" class="twikiLink"]] and [[Labview>>url:http://hasfweb.desy.de/bin/view/Setup/LabviewDOOCS||shape="rect" class="twikiLink"]]. For accessing the control system [[DOOCS addresses>>url:http://hasfweb.desy.de/bin/view/Setup/HDF5main||shape="rect" class="twikiLink"]] are required.
130 130  
131 -A collection (Matlab [ [[scan tool>>doc:FLASHUSER.Matlab Scantools]] , [[TOF & camera GUIs~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://stash.desy.de/projects/FSFL/repos/matlab-guis/browse||shape="rect"]], [[others>>doc:FLASHUSER.Collection of user codes]]] / [[Juypter notebooks~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://stash.desy.de/projects/FSFL/repos/jupyter-notebook/browse||shape="rect"]]) for common use cases is available.
131 +A collection (Matlab [ [[scan tool>>url:http://hasfweb.desy.de/bin/view/Setup/MatlabScanTools||shape="rect" class="twikiLink"]] , [[TOF & camera GUIs~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://stash.desy.de/projects/FSFL/repos/matlab-guis/browse||shape="rect"]], [[others>>url:http://hasfweb.desy.de/bin/view/Setup/UserCodeCollection||shape="rect" class="twikiLink"]]] / [[Juypter notebooks~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://stash.desy.de/projects/FSFL/repos/jupyter-notebook/browse||shape="rect"]]) for common use cases is available.
132 132  
133 133  == Data acquisition ==
134 134  
135 -Relevant machine data, e.g. pulse energy or arrival time, are are saved in the FLASH Photon diagnostics DAQ (PBD) while experiment related parameter are saved on demand in the FLASH [[User DAQs>>doc:FLASHUSER.Data Acquisition and controls.Data Access at FLASH (DAQ, gpfs,\.\.\.).Offline data analysis (DAQ).How to save data in the User DAQ.WebHome]]. In addition it is disk space availabe for devices and paramter outside the FLASH DAQ, which can be [[ synchronized via Ethernet connection>>doc:FLASHUSER.TrainID]]. The for the beamtime provided storage space, the [[spectrum scale~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://confluence.desy.de/display/ASAP3/Architecture||shape="rect"]] formerly known as ASAP3/GPFS, is access regulated via [[DOOR~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://door.desy.de/door/index.php||shape="rect"]] and only registered participants have access.
135 +Relevant machine data, e.g. pulse energy or arrival time, are are saved in the FLASH Photon diagnostics DAQ (PBD) while experiment related parameter are saved on demand in the FLASH [[User DAQs>>url:http://hasfweb.desy.de/bin/view/Setup/DAQjddd||shape="rect" class="twikiLink"]]. In addition it is disk space availabe for devices and paramter outside the FLASH DAQ, which can be [[synchronized via Ethernet connection>>url:http://hasfweb.desy.de/bin/view/Setup/TrainID||shape="rect" class="twikiLink"]]. The for the beamtime provided storage space, the [[spectrum scale~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://confluence.desy.de/display/ASAP3/Architecture||shape="rect"]] formerly known as ASAP3/GPFS, is access regulated via [[DOOR~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://door.desy.de/door/index.php||shape="rect"]] and only registered participants have access.
136 136  
137 137  The FLASH DAQ system records the data in binary .raw files. On request the data will also be available in the HDF5 format after a conversion during or after the beamtime. Incoming data is collected, sorted and saved into .raw files in chunks of 60 MB to 1 GB which corresponds to tens of seconds up to several minutes. The HDF5 files can be created nearOnline or Offline. In the nearOnline conversion every individual .raw files will be converted to a single HDF5 file to provide the fastest access possible. After the beamtime it is possible to get a HDF5 file per DAQ run which is very convenient as it contains the merged data of the User DAQ and the PBD DAQ.
138 138  
139 -While the DOOCS addresses are rather cryptic the [[HDF5 file>>doc:FLASHUSER.Information about the FLASH HDF5 structure]] is structured based on the actual location and function of the devices. A complete list is available 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"]].
139 +While the DOOCS addresses are rather cryptic the [[HDF5 file>>url:http://hasfweb.desy.de/bin/view/Setup/HDF5main||shape="rect" class="twikiLink"]] is structured based on the actual location and function of the devices. A complete list is available 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"]].
140 140  
141 141  \\
142 142  
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144 144  |=(((
145 145  [[DAQ introduction>>url:http://hasfweb.desy.de/pub/Setup/DAQmain/Operator_training_DAQ_May_2016.pdf||shape="rect"]]
146 146  )))|=(((
147 -[[FLASH1 PBD>>doc:FLASHUSER.PBD DAQ]]
147 +[[FLASH1 PBD>>url:http://hasfweb.desy.de/bin/view/Setup/DAQPbdDescription||shape="rect" class="twikiLink"]]
148 148  )))|=(((
149 149  [[FLASH2 PBD>>url:http://hasfweb.desy.de/bin/view/Setup/FL2PhotDiagDataStream||shape="rect" class="twikiLink"]]
150 150  )))|=(((
151 -[[User DAQs>>doc:FLASHUSER.Data Acquisition and controls.Data Access at FLASH (DAQ, gpfs,\.\.\.).Offline data analysis (DAQ).How to save data in the User DAQ.WebHome]]
151 +[[User DAQs>>url:http://hasfweb.desy.de/bin/view/Setup/DAQjddd||shape="rect" class="twikiLink"]]
152 152  )))|=(((
153 -[[User DAQs subsytems>>doc:FLASHUSER.Description of the Properties in the FLASH1_USER1, 2 and 3 for FLASH1 Users]]
153 +[[User DAQs subsytems>>url:http://hasfweb.desy.de/bin/view/Setup/DAQExp2Description||shape="rect" class="twikiLink"]]
154 154  )))|=(((
155 -[[HDF5 files>>doc:FLASHUSER.Information about the FLASH HDF5 structure]]
155 +[[HDF5 files>>url:http://hasfweb.desy.de/bin/view/Setup/HDF5main||shape="rect" class="twikiLink"]]
156 156  )))
157 157  
158 158  == nearOnline ==
... ... @@ -159,17 +159,17 @@
159 159  
160 160  ==== .raw files ====
161 161  
162 -The .raw files are only accessible from certain computers within the DESY network and in generell it is not recommended to use them directly. For checking the file content and doing simple analysis, e.g. histogram, line outs, we provide the [[DAQdataGUI>>doc:FLASHUSER.How to get the data out of the DAQ]]. If the user already have very precise knowledge of the desired parameters and it's types it is possible [[to read with Matlab from the files directly>>doc:FLASHUSER.Data Acquisition and controls.Data Access at FLASH (DAQ, gpfs,\.\.\.).Offline data analysis (DAQ).For experts\: many ways to get Data from the DAQ.How to Access the DAQ Using Matlab.WebHome]].
162 +The .raw files are only accessible from certain computers within the DESY network and in generell it is not recommended to use them directly. For checking the file content and doing simple analysis, e.g. histogram, line outs, we provide the [[DAQdataGUI>>url:http://hasfweb.desy.de/bin/view/Setup/DAQRootGui#How_to_Use_the_FLASH_DAQ_Data_GU||shape="rect" class="twikiAnchorLink"]]. If the user already have very precise knowledge of the desired parameters and it's types it is possible [[to read with Matlab from the files directly>>url:http://hasfweb.desy.de/bin/view/Setup/DAQMatlabAccessExamples||shape="rect" class="twikiLink"]].
163 163  
164 164  FLASH's DAQ .raw files are saved locally and with a time delay of a few minutes backupped via tape ( [[dCache~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://confluence.desy.de/display/ASAP3/Managing+data+taken+before+April+2015||shape="rect"]]) by the DESY central IT.
165 165  
166 166  ==== HDF5 files ====
167 167  
168 -As the .raw files are highly optimized for writing speed there are some issues which have to be taken care of which are also present in the nearOnline HDF5 files (e.g. missing/doubled events). For this we provide with [[BeamtimeDaqAccess>>doc:FLASHUSER.Beamtime DAQ Access]] an API which handles a lot of the occurring difficulties as knowing the file or DAQ instances. The [[BeamtimeDaqAccess>>doc:FLASHUSER.Beamtime DAQ Access]] library is written in Python, but a Matlab wrapper is available.
168 +As the .raw files are highly optimized for writing speed there are some issues which have to be taken care of which are also present in the nearOnline HDF5 files (e.g. missing/doubled events). For this we provide with [[BeamtimeDaqAccess>>url:http://hasfweb.desy.de/bin/view/Setup/BeamtimeDaqAccess||shape="rect" class="twikiLink"]] an API which handles a lot of the occurring difficulties as knowing the file or DAQ instances. The [[BeamtimeDaqAccess>>url:http://hasfweb.desy.de/bin/view/Setup/BeamtimeDaqAccess||shape="rect" class="twikiLink"]] library is written in Python, but a Matlab wrapper is available.
169 169  
170 170  == Offline ==
171 171  
172 -The offline HDF5 files containing complete DAQ runs will be put after the beamtime on the spectrum scale file system. Access is granted from the within the DESY network for beamtime participants or from the outside via [[Gamma portal~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://confluence.desy.de/display/ASAP3/The+Gamma+Portal||shape="rect"]]. HDF-by-run files can processed with common tools, e.g. with [[Matlab>>doc:FLASHUSER.Information about the FLASH HDF5 structure]] or [[Python>>doc:FLASHUSER.FLASHH5 for easier access of FLASH's HDF5 files]], as during the conversion a lot of discrepancies have been resolved. As .raw files are rarely used for analysis they are saved on the FLASH DAQ servers and will only be put on the spectrum scale file system on special request.
172 +The offline HDF5 files containing complete DAQ runs will be put after the beamtime on the spectrum scale file system. Access is granted from the within the DESY network for beamtime participants or from the outside via [[Gamma portal~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://confluence.desy.de/display/ASAP3/The+Gamma+Portal||shape="rect"]]. HDF-by-run files can processed with common tools, e.g. with [[Matlab>>url:http://hasfweb.desy.de/bin/view/Setup/HDF5main#Samples_how_to_read_HDF5_with_Ma||shape="rect" class="twikiAnchorLink"]] or [[Python>>url:http://hasfweb.desy.de/bin/view/Setup/FlashH5||shape="rect" class="twikiLink"]], as during the conversion a lot of discrepancies have been resolved. As .raw files are rarely used for analysis they are saved on the FLASH DAQ servers and will only be put on the spectrum scale file system on special request.
173 173  
174 174  The spectrum scale file system contains the [[substructure~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://confluence.desy.de/display/ASAP3/Directory+Structure||shape="rect"]]: {{code language="none"}}raw{{/code}}, {{code language="none"}}processed{{/code}}, {{code language="none"}}shared{{/code}} and {{code language="none"}}scratch{{/code}}. The (% class="WYSIWYG_TT" %)raw (%%)folder contains the data recorded by the experiment (user data and HDF5) and will be set read only shortly after the beamtime is over. {{code language="none"}}Processed{{/code}} is typically used to store processed data and analysis software. Both folder are backupped by the spectrum scale file system.
175 175