April 22nd 2021

• Updates
  • VMM
    • FPGA bought from Newark, were delivered, other chips ordered but have not came in yet
    • Firmware development : positive results for 128 channels with gigabit ethernet, looking at GBT data path
    • Jeff going back to VMM prototype board
    • George agreed to loan and ship VMM test board : eval board same that we have with a chip socket, different firmware and software. Cannot test direct path though . Though few failures of direct output if chip pass test with this board.
    • How big is BGA socket for VMM ?
    • need to get firmware and software to setup and practice
    • estimate prototype board ? ~10 layers
    • list of parts to Nilanga
  • APV
    • still looking at APV noise issue - testing with Ben, MPD might add to the noise - ordered filter to see if it can reduce the noise
    • MPD resistors 1.25 V line added, helps but not good enough
    • did test with small GEM : same behavior as large one but noise fluctuations small. Common noise same for small and big - will try copper shielding to see if that helps
    • Paolo looking at fixing design of MPD and small production of 5 MPDs
  • FADC
    • Dave Abbott has VTP readout running with TI, with FADC next
  • UMass test stand
    • Ben helped debugging cluster finding algorithm. Successfully compiled. Project next week to test
    • Asymmetry : function generator method works, second method with happex timing board need to be tested
      **AARDVARC received

*Next week streaming readout workshop