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Last modified by sndueste on 2025-09-08 15:36
From version 26.1
edited by sndueste
on 2021-06-07 08:45
Change comment: There is no comment for this version
To version 27.1
edited by erlandm
on 2021-06-17 15:46
Change comment: There is no comment for this version

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99 99  The (% class="twikiNewLink" %)DAQdataGui(%%) is a powerful tool to visualize the saved data and to do very preliminary analysis. however for more detailed analysis the data has to be read into analysis programs ( matlab, python, Origin ...) here are different options one can use (what option is the best and how to set it up has to be discussed before hand with the FLASH DAQ experts ...)
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101 101  * The FLASH DAQ system records the data in binary " {{code language="none"}}.raw{{/code}} " files.
102 -** [[reading the data via Matlab >>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]] works not for all data types equally well and needs precise knowledge of the desired Parameters (useful to have a quick look / preliminary analysis on few parameters).
102 +** (% class="confluence-link" %)reading the .raw files [[directly via Python>>url:https://ttfinfo.desy.de/DOOCSWiki/Wiki.jsp?page=PythonDAQClientInterface||shape="rect"]], or [[via Matlab >>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]](%%)(no longer recommended) works, yet not for all data types equally well, and needs precise knowledge of the desired Parameters (useful to have a quick look / preliminary analysis on few parameters).
103 103  ** Note that the raw data is only accessible from certain computers within the DESY network and thus not very handy for offline analysis later on ...
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105 105  \\
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107 107  * To ease the data analysis we IN ADDITION provide //ON REQUEST// the data from the FLASH DAQ as HDF5 format
108 -** ONLINE HDF5s: To make efficient use of the HDF5 files for analysis during the beamtime and afterwards we provide a [[very useful tool (Beamtime Daq Access)>>doc:FLASHUSER.Near-Online data analysis]]. Using this tool (working for Python and Matlab) one can get the data of parameters per run or for specific bunch ID intervals etc. without having to care from which subset of HDF5 files the data is read ...
109 -** Summary HDF5 files include complete runs. They will be put after the beamtime on the gpfs storage and are available from computers within DESY (for registered Beamtime participants) and also access
110 -** Intro to the [[HDF5 structure used at FLASH>>doc:FLASHUSER.Data Acquisition and controls.Data Access at FLASH (DAQ, gpfs,\.\.\.).Offline data analysis (DAQ).The FLASH HDF5 structure.WebHome]]. This contains also a list of the most used Parameters saved at FLASH for analysis - including the HDF5 names, DOOCS and DAQ names ...
111 -** [[Short examples>>doc:FLASHUSER.Data Acquisition and controls.Data Access at FLASH (DAQ, gpfs,\.\.\.).Offline data analysis (DAQ).The FLASH HDF5 structure.WebHome]] and [[user provided examples>>doc:FLASH.Collection of user codes]] on how to read HDF5 in Matlab
108 +** ONLINE HDF5s: Intro to the [[HDF5 structure used at FLASH>>doc:FLASHUSER.Data Acquisition and controls.Data Access at FLASH (DAQ, gpfs,\.\.\.).Offline data analysis (DAQ).The FLASH HDF5 structure.WebHome]]. This contains also a list of the most used Parameters saved at FLASH for analysis - including the HDF5 names, DOOCS and DAQ names ...
109 +** [[Examples>>url:https://gitlab.desy.de/christopher.passow/flash-daq-hdf||shape="rect"]] and an [[API>>url:https://gitlab.desy.de/christopher.passow/fdh-builder||shape="rect"]] to make use of the online HDF5s
110 +** [[Short examples>>doc:FLASHUSER.Data Acquisition and controls.Data Access at FLASH (DAQ, gpfs,\.\.\.).Offline data analysis (DAQ).The FLASH HDF5 structure.WebHome]] and [[user provided examples>>doc:FLASH.OUTDATED - Collection of user codes]] on how to read HDF5 in Matlab (no longer recommended).
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113 113  The HDF5 files (online and summary) are saved in the [["gpfs" system ~[~[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"]]. it can be accessed from [[Windows and Linux computers at DESY~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://confluence.desy.de/display/ASAP3/Mounting+the+storage+system+at+the+beamline||shape="rect"]] by the persons ( logins) which are registered for the beamtime in DOOR ( functional accounts
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