• Main INDEX
  • Monthly INDEX
  • PREV
  • NEXT
    Make New Entry, Make Followup Entry

    User name D. Parno

    Log entry time 21:15:37 on February 15, 2009

    Entry number 261357

    keyword=Wiring additions to Compton FADC DAQ

    During this evening's access, I made a few additions to the new Compton FADC photon DAQ.

    Thanks to a level converter generously provided by Alexandre, I was able to add two variables to our scalers: the MPS signal (now in scaler #5) and a copy of the trigger generated by the photon detector signal (now in scaler #6). This last is the same trigger used for our triggered mode.

    I increased the threshold on the discriminator used to generate the trigger from -30 mV to -50 mV. We'll see over the next day and a half whether this is a reasonable level for cutting out low-energy noise while retaining Compton events. If it isn't, I will change the threshold again during Tuesday beam studies.

    A copy of this log entry has been emailed to: gbfranklin@cmu.edu, camsonne, fatiha, rom