Pedestals for ~timed MAPMT
  • events were taken by Jim with STAR DAQ run 5022015, trig=pedAsPhys, 3K events
  • the Gaussian was fitted arround peak in ADC spectrum [0,400].
  • primitive QA flagged suspected spectra 
       pix- > setQA(2000, 1.,30, 0.5,2.); // minInt, pedLow, pedHigh, pedSigMin pedSigMax

   if(h- > Integral() < qa_minInt) qaString[0]='I';
    if(fit- > GetParameter(1)< qa_pedLow) qaString[1]='L';
    if(fit- > GetParameter(1)> qa_pedHigh) qaString[2]='H';
    if(fit- > GetParameter(2)< qa_pedSigMin) qaString[3]='N';
    if(fit- > GetParameter(2)>qa_pedSigMax) qaString[4]='W';
  • ASCII data for SMD for ~2300 strips. QA is included.
  • ASCII data for pre/post for 4x180 channels
  • The majority of channels has a nice spectra with pedestal at 140 - 250, as this one
    Three are 3 distinct patologies picked up by the QA with cuts as above (from all 16 boxes).

  • A) pedestal is very high, channels are born in pairs
    strip ped , RMS crate/channel
    05U019 3545, 2.6 84/85
    05U079 2045 , .88 84/84
    05U120 964, .52 86/168
    05U220 933, .52 84/175
    06U217 531, .6 89/000
    07U089 3071, 0.0 93/077
    07U149 3071, 0.0 93/079
    07U213 1997, 1.1 93/076
    07U277 93/078
    08U085 98/45
    08U145 98/47
    08U146 98/144
    08U190 96/119
    08U209 98/44
    08U230 96/118
    08U273 98/46
    08V011 96/117
    08V071 96/116
    06QB08 * 99/116
  • B) apart from a good pedestal peak (green squeezed peak) there are few more spikes. Only in channel 004!
    strip ped , RMS crate/channel
    06U069 88/004
    06U169 90/004
    06V169 89/004
    06RD10 91/004
    07U069 92/004
  • C) spectrum is just an electronic burp.
    strip ped , RMS crate/channel
    06U154 88/154
    06V136 88/015
    06V231 88/153
    06V249 89/008
    07V156 88/167
  • D) jumping pedestal (all have similar width & intensity)
    strip ped , RMS crate/channel
    06QA10 91/108
    06QB01 91/102