Before beamtime Checklist

Version 8.1 by sndueste on 2023/07/20 13:39

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Questions to consider before the beamtime

Weeks before the actual beamtime the Usergroup should think about the needs for the experiment and get in contact to the DAQ / IT group at FLASH and define several boundary conditions:

What kind of data you want to record in the FLASH DAQ?
- Several options of the photon diagnostic are available which are NOT operated as standard (VLS, OPIS, ... see Photon Diag pages
- What kind of ADC is the best one for you? Are amplifiers needed? what sample rate, how many channels ...
- several types of cameras can be integrated in the FLASH DAQ system - talk to the experts (well in advance !) if you plan to use cameras.
- For detector systems such as pnCCD imaging- detectors and ion/electron spectrometers available at the CAMP end-station please contact us to discuss your particular requirements (well in advance !).

Do you have own detectors to be recorded ?
- It has to be checked that they can be stored on the FLASH data storage (gpfs)
- They could probably be included in the FLASH DAQ system - _this needs sufficient lead time. Talk several WEEKS before the beam time to the local contact / experts _

What parameters you need to monitor life during the beamtime?
- how you plan to monitor the parameters (jDDD, Matlab, Python, Labview) ?
- do you need online treatment of data ( averaging, integration of peaks ...) ?
- do you have to control Hardware from FLASH ( e.g. delaylines ...). Do you need scans with online display ?

data analysis needs
- Do you need nearOnline HDF5 files for your (semi-online) analysis during the beamtime.
- Which parameters do you need for your (semi-online) analysis ?
- how do you want to do analyze your data ? Can we find scripts from other users servering most of your needs?
- How much computational power will the analysis need (can we use the analysis servers at the beamline or do we have to use more powerfull recources) ?

Data access after the beamtime:
- data recorded with the FLASH DAQ will have to be moved to a long time (tape) storage few month after the beamtime. During / shortly after the beamtime it has to be decided where to put the data.

Pre and post beamtime questionnaires

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at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:904)
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at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:832)
at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:91)
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at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2564)
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at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:598)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:223)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1580)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:221)
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at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:176)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:484)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1553)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:174)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1306)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:129)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:192)
at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:51)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:122)
at org.eclipse.jetty.server.Server.handle(Server.java:563)
at org.eclipse.jetty.server.HttpChannel$RequestDispatchable.dispatch(HttpChannel.java:1598)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:753)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:501)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:287)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:314)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:100)
at org.eclipse.jetty.io.SelectableChannelEndPoint$1.run(SelectableChannelEndPoint.java:53)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.runTask(AdaptiveExecutionStrategy.java:421)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.consumeTask(AdaptiveExecutionStrategy.java:390)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.tryProduce(AdaptiveExecutionStrategy.java:277)
at org.eclipse.jetty.util.thread.strategy.AdaptiveExecutionStrategy.run(AdaptiveExecutionStrategy.java:199)
at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:411)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:969)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.doRunJob(QueuedThreadPool.java:1194)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:1149)
at java.base/java.lang.Thread.run(Thread.java:840)

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