May 4th 2022

• Updates
  • HCAL
    • Bryan booted the VTPs and working on readout list for VTP
    • Ben 10 gigE transceiver, Alexandre plugged the fibers to router
    • VTP library and initial readout list setup, few configurations files need to be updated, switch to add to the flash readout list, maybe test in a few days
  • Hodoscope
    • Glasgow people coming in summer
    • might still need to take data for ToT calibration with FADC
  • GEM
    • one layer taken out from BB, will replace HV parallel power supply
    • can other detector be turned on ? HV GEM off so can take cosmics
  • Shower : get ready to take cosmics again
  • made configuration without GEM with 2 and 3 event builders
  • HV
    • HV software working with RPi4

• Discussion multiple streams
  • testing DAQ setup https://logbooks.jlab.org/entry/3992794
  • want to add second DC
  • online monitoring
  • EPICS/scaler insertion : would like to insert in all the streams ? Right now only going in one stream - ev
    • 3 streams : 3 to 1 split - evenly
    • open 3 files at same time - and make one stream ? ( need software work )
    • or put back 3 streams in one and feed existing software

• • Helicity info insertion - Paul has readout list to test with ring buffer
    • if in time can record in register -
    • new helicity board should be avalaible : can record helicity event by event
    • use the scaler and event register
    • needs helicity event ?
    • only one stream of event number - unique
    • Ole could try to open 3 streams and produce one stream - small snag : number of event could be different
    • input class taking all segments to present to analyzer , so could adapt class for multiple streams
  • charge feedback ? with multistream - use parity DAQ so most likely ok- could use scalers but less precise - Could set up QWeak - Parity DAQ using CODA 2.6 - ET would be broken for CODA 3 - but existing should be fine for feedback

• • software required changes to handle multiple stream files
  • make sure some headers are in all stream : control events written to all 3 streams
  • feature used by Hall D, every time new split file , one event can be recorded in each new BOR
  • can write to one stream by selecting the ET system where EB runs

• Channel counts for GEM per plan : Alex will get ( from Kondo presention )

• GEn ERR : option to have GEM SBS was not on ERR - 20 or 30 lower luminosity

• GEn RP : had all the GEMs -