Trigger History

Dec 2017

• Dec 7 2017  : NIM modules for setting the pulse width of S1X,S1Y,S2X and S2Y before the HODO 3/4 trigger changed to 758 from 752 in SHMS and HMS Log Entry
• Dec 8 2017  : HMS/SHMS HODO thresholds at 30mV. Log Entry
• Dec 8 2017  : Oscilliscope pictures of HMS trigger using EDTM Log Entry
  • Note that this quickly changed and use later pictures.
• Dec 8 2017  : Oscilliscope pictures of SHMS trigger using EDTM Log Entry
  • Note that this quickly changed and use later pictures.
• Dec 12 2017 : Oscilliscope pictures of HMS trigger using beam. Log Entry
  • In HMS HODO 3of4 S1X is now sets the timing. All widths are 50ns.
  • In HMS EL_LO which is a 2/3 from PR_LO,STOF and HODO 3of4, the STOF sets the timing.
  • All other signal widths at 50ns.
• Dec 19 2017  : Oscilliscope pictures of SHMS trigger using beam. Log Entry
  • In SHMS HODO 3of4 S1X is now sets the timing. All widths are 100ns.
  • In SHMS EL_LO which is a 2/3 from PR_LO,STOF and HODO 3of4, the STOF sets the timing.
  • All other signal widths at 50ns.
• Dec 21 2017  : Oscilliscope pictures of SHMS/HMS coincidence using beam. Log Entry
  • Signal widths at 50ns.
  • HMS sets timing.
  • Elastic data with SHMS p = -1.816, theta = 25.01 and HMS p = +0.957, theta = 53.3

Jan-July 2018

• Jan 15 2018: Shift the STOF by 15ns in the SHMS and HMS EL_LO triggers. Log Entry
• Jan 18 2018 : Adjusted HMS timing in the coincidence trigger for having both spectrometers with beta near 1. Log Entry
  • Oscilliscope picture of trigger. Log Entry
• Jan 23 2018 : Removed the HMS STOF from reference time singal. Log Entry

Aug 2018 =

• Aug 9 2018 : Removed El_CLEAN from SHMS/HMS reference time Log Entry