Difference between revisions of "Data Acquisition System"

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==DAQ Hardware==
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=='''DAQ Hardware'''==
  
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* Electronic Map of Mott Crates (January 29, 2013):
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* Electronic Map of Mott Crates (May 06, 2014):
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[[Media:ElectronicsMap_20130129.pdf]]
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[[Media:ElectronicsMap_May062014.pdf]]
  
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[[Media:ElectronicsMap_20130129.ppt]]
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[[Media:ElectronicsMap_May062014.pptx]]
  
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* Cabling of FADC, Scalers, and TDC (January 29, 2013):  
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* Cabling of FADC, Scalers, and TDC (February 12, 2014):  
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[[Media:Cable_20130129.pdf]]
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[[Media:Cable_Feb122014.pdf]]
  
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[[Media:Cable_20130129.pptx]]
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[[Media:Cable_Feb122014.pptx]]
  
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* DAQ Timing (January 29, 2013):  
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* DAQ Timing (February 12, 2014):  
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[[Media:DAQ_Timing_20130129.pdf]]
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[[Media:DAQ_Timing_Feb122014.pdf]]
  
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[[Media:DAQ_Timing_20130129.pptx]]
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[[Media:DAQ_Timing_Feb122014.pptx]]
  
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* Discriminator threshold adjustments (18January2015):
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[[Media:Discriminator_threshold_adjustment.odt]]
  
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= How to run CODA =
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[[Media:Discriminator_threshold_adjust.ods]]
  
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* From an accelerator machine: '''ssh -X idaq@opsmdaq0''' (Note: '''idaq''' is the injector DAQ account and uses ssh authorized_keys for login - no need to enter password) and open few '''xterm &''' windows.
 
  
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  xterm 1: telnet iocmdaq1
 
  
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  xterm 2: mslqd (the msqlp database is usuaaly running unless opsmdaq0 was rebooted)
 
  
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  xterm 3: platform
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=='''DAQ Software'''==
  
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  xterm 4: codamaster
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* '''[[How to run CODA]]'''
  
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Choose the configuration: '''Mott_Sample'''
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* '''[[Online Monitoring]]'''
  
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When the CODA MASTER panel appears, select '''Config''' => '''Enable Buttons'''.
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* '''[[Mott Analysis]]'''
  
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Select '''ET System''', '''Event Builder''' and '''Event Recorder'''. and '''Run Control'''.
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* '''[[CODA Summary]]'''
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After doing that if you will click on '''Get Status''' you will find status of ''' Event builder''' '''Event Recorder''' and of the '''ROC1'''. All buttons must be green.
 
  
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Selecting '''Run Control''' the main CODA panel will appear.
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* '''[[CODA Scripts]]'''
  
  
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== Start and Stop a Run ==
 
  
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After the opening of the Run Control panel, select in order:
 
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# '''Sessions''' => '''inj'''
 
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# '''Configurations''' => '''Cool''' => '''Mott_Sample'''
 
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# '''Platform''' => '''Connect'''
 
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# '''Configure'''
 
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# '''Download'''
 
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# '''Prestart'''
 
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# '''Start'''
 
  
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At the end:
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=='''Manuals and References'''==
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<ol start="8">
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* Jefferson Lab Data Acquisition Group CODA Wiki [https://coda.jlab.org/drupal/]
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<li>''Stop''</li>
 
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</ol>
 
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and if you want to apply a change or you need a new configuration:
 
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<ol start="9">
 
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<li>''Reset''</li>
 
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</ol>
 
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and start from number 5. When you are applaying a reset, do it twice (suggestion).  
 
  
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== Errors, Warnings and FAQ ==
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* CAEN VME Crate Manual - VME8200 9U 21Slot (VME64x backplane with no P0 connector) [[media:VME8200_Manual.pdf]]
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#
 
  
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== How to use the VME discriminator ==
 
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The VME discriminator is the CAEN v895 whic has several possibilities.
 
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It is used in several configuration file but it must be set up correctly.
 
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The configurations used, at the moment, are:
 
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* PEPPo_Sample, PEPPo_Cosmics, Annihilation_Sample, PEPPo_SemiInt
 
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How to use the module, from every directory:
 
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  v895_config
 
  
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An user interface will appear.
 
  
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[[Image:V895_config.png]]
 
  
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PMT refer to PEPPO cristal PMTs, A1 and A2 are for annihilation counter and cosmics are for cosmic paddles.
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=='''To-do List'''==
  
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* Set thresholds for all the channels (thresholds are in mV) and select(tick) only channels used.
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* Analysis List:
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# Add delayed helicity analysis for Mott_Sample and Mott_SemiInt Modes. Delayed analysis is already included for Scalers and PEPPo_Int Modes.
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# Modify decoder for the updated Mott_SemiInt mode. Started: /work/idaq/Mott/Analysis/1, Runs: 7642, 7672. Sample: 7673
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# Update MottOnline
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# Replace "PEPPo" with "Mott" in scripts, decoder, ... .
  
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* To set the number of channels used as to generate one trigger select the ''Majority Level'' (MJL) or coincidence.
 
  
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MJL = 1 means that, with at least one detector above the threshold, it generates the output signal.
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* '''[[New Delayed Helicity Readout Scheme for Physics Events Trigger]]'''
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MJL = 3 you need at least 3 detector signals above the thresholds to generate the output signal
 
  
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For Cosmic and Annihilation configurations MJL set to 2.
 
  
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To close Coda use the codamaster panel and press ''kill all'' followed by the exit botton under 'configuration'.
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* Things to do to speed up the DAQ and reduce deadtime:
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# Use the new SemiIntFast Mode:
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## Upgrade the time-of-flight readout to the FADC TDC mode
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## Upgrade the scalers readout to the FADC Scaler mode
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## Add Block Readout
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# Reduce the Mott Trigger rate by rejecting low energy electrons or dump events:
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## Increase E-detector discriminator thresholds
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## Veto dump events using beam timing signal
  
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* Max's list of random things
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== How to use the JLAB VME discriminator ==
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# need to get the signal propagation vs. electron TOF delay for the helicity decoder correct
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One can open a GUI in from opsmdaq0
 
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  /opt/idaq/lib/JLabdiscr/GUIDiscrim/src
 
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[[Image:JLABDisc.png]]
 

Latest revision as of 16:39, 14 November 2024

DAQ Hardware

  • Electronic Map of Mott Crates (May 06, 2014):

Media:ElectronicsMap_May062014.pdf

Media:ElectronicsMap_May062014.pptx

  • Cabling of FADC, Scalers, and TDC (February 12, 2014):

Media:Cable_Feb122014.pdf

Media:Cable_Feb122014.pptx

  • DAQ Timing (February 12, 2014):

Media:DAQ_Timing_Feb122014.pdf

Media:DAQ_Timing_Feb122014.pptx

  • Discriminator threshold adjustments (18January2015):

Media:Discriminator_threshold_adjustment.odt

Media:Discriminator_threshold_adjust.ods



DAQ Software



Manuals and References

  • Jefferson Lab Data Acquisition Group CODA Wiki [1]



To-do List

* Analysis List:
  1. Add delayed helicity analysis for Mott_Sample and Mott_SemiInt Modes. Delayed analysis is already included for Scalers and PEPPo_Int Modes.
  2. Modify decoder for the updated Mott_SemiInt mode. Started: /work/idaq/Mott/Analysis/1, Runs: 7642, 7672. Sample: 7673
  3. Update MottOnline
  4. Replace "PEPPo" with "Mott" in scripts, decoder, ... .


* New Delayed Helicity Readout Scheme for Physics Events Trigger



* Things to do to speed up the DAQ and reduce deadtime:
  1. Use the new SemiIntFast Mode:
    1. Upgrade the time-of-flight readout to the FADC TDC mode
    2. Upgrade the scalers readout to the FADC Scaler mode
    3. Add Block Readout
  2. Reduce the Mott Trigger rate by rejecting low energy electrons or dump events:
    1. Increase E-detector discriminator thresholds
    2. Veto dump events using beam timing signal
* Max's list of random things
  1. need to get the signal propagation vs. electron TOF delay for the helicity decoder correct
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