Difference between revisions of "June 29th 2022"

Latest revision as of 09:37, 29 June 2022

• Subsystems update
  • HCal
    • Jiwan working with detector, cosmics and LED, detector looks good, new wiki for HCAL
    • Fast FADC configuration, to be tested, need to modify analysis
    • side band still needs to be investigated
  • Hodoscope
    • HV scans with FADC
    • everything looks ok
    • HV crate update : waiting for the box to ship the new crate, old board should work in new crate, old crate might have radiation
  • Beamline
    • hardware working on improving uniformity of raster, reasonable shape but could do better
    • want to do unser calibration , takes about 1 hour
    • will use DAQ 10 AM EST for about one
    • split for parity feedback - do we want to do unser calibration after the split ?
  • Parity/helicity
    • cables run next to the BCM and already plug on other side, will coordinate with David ( unser 4 KHz/uA as expected ) , can pull down by about 1%
    • plan to run 30 Hz 500 us for GEn
    • might be delayed for Hall B
    • calibration of sign of asymmetry ? (Bogdan) - Usually come from Moller
    • detector asymmetries ? event tagged with helicity
  • GEM
    • hardware work, SBS GEM frame on , need few more weeks before install, installation network and fibers ~ 2 weeks
    • Bigbite GEM : new parallel HV installed, working, Sean will take cosmics, Nilanga coordinating EPICS controls for the new HV
    • started put SBS crate on network, 2 VTP booted and 2 CPU, one device did not pick up correct IP address, still need to plug fiber for VTP
    • eel124gemdaq will be installed in the hall so DAQ can be run
    • Bryan putting together SBS and BB libraries together, programs for goal post and fish plots, can now be done from the VTP , information on wiki, working on resolving the differences between readout list
  • Shower
    • trigger working and set for cosmics data
    • can modify and read threshold for bbcal high, need to implement for bbcal low, unplugged discrminator and given to Armen to modify to be able
    • 14-2 PMT behaving weirdly, might replace the base, very unstable - same HV peak was 20 mV but week ago 80 mV now high unexplained difference
    • check if PMT itself or electronic chain, check electronics and HV first
    • magnetic field : measure with Hall probe and measure - look at GMn
    • VTP trigger for shower

• Update spreadsheet Dillon