2018 Data - Analysis Page

2018 Data: Analysis Summary

Target Information

• Target configuration report
  • Note: cryotargets need to subtract window thickness and apply a correction of 0.996 due to length contraction at low temperature
• Target ladder survey
  • Note: z position of "raster target" is upstream face. All solid targets have upstream face at same psoition.
• Solid target notes
  • Note: I think there was a transcription error for the carbon target. The report says 0.5244 g/cm2. I get 0.5224 g/cm2 from the notes above.
• Beam and target offsets:
  • Analysis of SHMS/HMS C data (log entry needed)
  • Offsets to put in MC (from email from Abishek)
    • x-spec offset = +0.127 cm
    • y-spec offset = -0.057 cm
    • x-beam offset = (0.073 - x-bpm) cm
    • z-target offset = 0.212 cm (carbon target)
• How I get Boron from B4C: [1]

BCM calibration

• Summary from Deb
• Correction for runs 2557-2563 (multiply charge by 1.0115) XEM2 elog 60

Efficiencies and corrections

• Target Boiling
  • Bill's analysis (HMS tracks?): F2 elog 444
    • LH2 3.83% / 100 uA (+/- 0.64 %)
    • LD2 4.44% / 100 uA (+/- 0.72 %)
  • Casey (HMS tracks): XEM2 elog 75
    • LH2 2.88% / 100 uA (+/- 0.62 %)
    • LD2 3.56% / 100 uA (+/- 0.41 %)
• SHMS
  • NGC efficiency lookup table: F2 elog 317
  • Calorimeter efficiency: F2 elog 287 F2 elog 287
  • Trigger efficiency F2 elog 295
  • Electronic dead time
  • FADC dead time (100 ns)???
• HMS
  • Cerenkov efficiency F2 elog 300
  • Calorimeter efficiency F2 elog 300
  • Trigger efficiency F2 elog 299
  • Electronic dead time
  • FADC dead time (100 ns)???
• EMC only
  • Isoscalar corrections