Difference between revisions of "SBS DAQ meetings"

Revision as of 11:20, 13 December 2019

Bluejeans

https://bluejeans.com/596873830/?src=calendarLink

December 13th 2019

• GEp DAQ layout
• GMn DAQ layout

November 22th 2019

• HCAL status
  • debugging old half, 6 channels have issues - TDC or discriminator issues maybe for 4 of them - 2 might be related to VME slot ? -

look with Bryan's decoder located in /site/coda/contrib/devel/dataDecode - if really looks like hardware issue can use VME bus analyzer

• • Ben setup the FADC gui - will be useful for FADC/detector debugging - Scott will write some documentation on wiki
  • start cabling other half of detector maybe next week
  • control pulser - use L1A to trigger LED, or use a VME pulser ( will try to give a DVCS LED board to Juan Carlos )
• Grinch
  • DAQ issues - crashing for long runs
  • need to investigate - maybe check event size
• BigBite
  • need new TS crate to check the final timing
  • takes about to generate Shower trigger : 60 ns cable + 60 ns logic + cable 25 m = 100 ns ~ 250 ns

October 25th 2019

• Detectors DAQ status
  • BigBite
    • ADCs working fine running with CODA 2
    • signals from all shower preshower channels
    • can look at data with scripts
    • add TDCs to setup (27x7 + 2x27 ) = 243 channels, only sums so 52 channels ( 1 x 1877S )
    • try CODA3

• • HCal
    • FADC and F1 all running on HCAL
    • resolution checks, not good right now, might be due to discriminator ( Phillips 715 )
    • looking at cosmics
    • all cables for second half of HCAL
    • still unlock error on 1 TDC , need try lower resolution
    • still on CODA2

• CODA3 testing (Bob) pdf
  • decoder in Podd can figure out if CODA3 or CODA2 data so should be transparent to SBS online library
  • trigger data not decoded yet
  • Eric tried CODA3 at beginning but still need some work for Fastbus
  • Need CODA3 for VTP

• ATOM CPU testing
  • does not work out from the box

October 4th 2019

• Bigbite DAQ status ( Eric )
  • slide here pdf
  • taking data but timing needs to be done to look at detector signals
  • Eric should look at existing PODD classes for shower to decode Fastbus
  • Shower trigger  : less than 200 ns
  • test trigger lines : 190 ns might

• HCAL DAQ status ( Scott )
  • 2 crates : 1 VXS crates with FADC and 1 VME64X with F1 and FADC

- see cosmics in both crates in FADC , missing in TDC ( need to check new timing with 2 crates )

- resolution lock issue with F1, might be overheating

- add blanks to improve cooling

- reduce resolution of F1 to see if problem goes away

- latency from TI ( OT2 is prompt output less delay down to 200 ns)

• UVA GEM status (Bryan / Kondo )

- 3 VME crates in clean room with TI ( 2 VME and 1 VXS ) : 2 planes per crate , 1 TI and one fiber, need 1 TI with two transceiver

- using CODA3

- wiki with information on wiki : SBS_DAQ:_GEM_EEL_Cleanroom_setup

- computer ready soon

- 3rd (VXS) crate with SSP and MPDs

• SSP readout ( Ben )

- 16 MPD for 1 SSP to be tested

- all transceiver and fibers on site

- test radiation hardness of transceivers and fibers

• BCM digital :

- daughter board design done, need to make prototypes and test

• Certification of electronics : need to check with Ed Folts ( Nilanga question )

• CDet
  • All TDC for coordinate in weldment : need checks ?
  • Software : running DAQ CODA and root scripts to analyze, need to check if other functionalities needed. Library can be loaded in Hall A / SBS analyzer
  • amount of TDCs for CDet sufficient
  • 25 TDCs - need to check with Bob