Difference between revisions of "2018 Data - Analysis Page"

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* [https://wiki.jlab.org/xem2wiki/images/7/75/TGT-RPT-18-001.pdf Target configuration report]
 
* [https://wiki.jlab.org/xem2wiki/images/7/75/TGT-RPT-18-001.pdf Target configuration report]
 
** Note: cryotargets need to subtract window thickness and apply a correction of 0.996 due to length contraction at low temperature
 
** Note: cryotargets need to subtract window thickness and apply a correction of 0.996 due to length contraction at low temperature
 +
* [https://wiki.jlab.org/xem2wiki/images/e/e0/DT_C1819.pdf Target ladder survey]
 +
** Note: z position of "raster target" is upstream face.  All solid targets have upstream face at same psoition.
 
* [https://wiki.jlab.org/xem2wiki/images/5/5f/Solid-tgt-thick-notes.pdf Solid target notes]
 
* [https://wiki.jlab.org/xem2wiki/images/5/5f/Solid-tgt-thick-notes.pdf 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.
 
** 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.
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** Analysis of SHMS/HMS C data ('''''log entry needed''''')
 
** Analysis of SHMS/HMS C data ('''''log entry needed''''')
 
** Offsets to put in MC (from email from Abishek)
 
** Offsets to put in MC (from email from Abishek)
−
*** x-spec offset = +0.127 cm  
+
*** x-spec offset = -0.127 cm (updated from + to - 5/21/2021)
 
*** y-spec offset = -0.057 cm  
 
*** y-spec offset = -0.057 cm  
−
*** x-beam offset = (0.073 - x-bpm) cm  
+
*** x-beam offset = (0.073 - x-bpm) cm (xbpm calculated in right handed coordinate system)
 
*** z-target offset = 0.212 cm (carbon target)
 
*** z-target offset = 0.212 cm (carbon target)
 +
**** LH2 1.55 mm upstream of carbon center: z = 0.057
 +
**** LD2 1.45 mm upstream of carbon center: z = 0.067
 +
**** Be 2.4 mm downstream of carbon center: z = 0.452
 +
**** 10B4C and 11B4C at same z position as carbon: z = 0.212
 
* How I get Boron from B4C: [https://wiki.jlab.org/xem2wiki/images/4/4c/Boron_yield_and_subtraction.pdf]
 
* How I get Boron from B4C: [https://wiki.jlab.org/xem2wiki/images/4/4c/Boron_yield_and_subtraction.pdf]
 +
 +
===SHMS/HMS Cherenkov Gas Information===
 +
*CO2 at 1 atm was the gas used in the SHMS noble gas Cherenkov.
 +
https://logbooks.jlab.org/entry/3508688
 +
*The HMS Cherenkov was filled with C4F8O at 0.45 atm.
 +
https://logbooks.jlab.org/entry/3497989
 +
 
===BCM calibration===
 
===BCM calibration===
 +
* Summary from Deb
 
* Correction for runs 2557-2563 (multiply charge by 1.0115) [https://hallcweb.jlab.org/elogs/X%3E1+%26+EMC/60 XEM2 elog 60]
 
* Correction for runs 2557-2563 (multiply charge by 1.0115) [https://hallcweb.jlab.org/elogs/X%3E1+%26+EMC/60 XEM2 elog 60]
  
 
===Efficiencies and corrections===
 
===Efficiencies and corrections===
 
* Target Boiling
 
* Target Boiling
−
** LH2 target:
+
** Bill's analysis (HMS tracks?): [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/444 F2 elog 444]
−
** LD2 target:
+
***LH2 3.83% / 100 uA  (+/- 0.64 %)
 +
***LD2  4.44% / 100 uA  (+/- 0.72 %) 
 +
** Casey (HMS tracks): [https://hallcweb.jlab.org/elogs/X%3E1+%26+EMC/75 XEM2 elog 75]
 +
***LH2  2.88% / 100 uA  (+/- 0.62 %)
 +
***LD2 3.56% / 100 uA  (+/- 0.41 %)
 
* SHMS
 
* SHMS
 
** NGC efficiency lookup table: [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/317 F2 elog 317]
 
** NGC efficiency lookup table: [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/317 F2 elog 317]
−
** Calorimeter efficiency: [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/287 F2 elog 287] (can't find log entry with polynomial form)
+
** Calorimeter efficiency: [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/287 F2 elog 287] [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/321 F2 elog 287]
−
** Trigger efficiency
+
** Trigger efficiency [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/295 F2 elog 295]
 
** Electronic dead time
 
** Electronic dead time
 +
** FADC dead time (100 ns)???
 
* HMS
 
* HMS
−
** Cerenkov efficiency
+
** Cerenkov efficiency [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/300 F2 elog 300 ]
−
** Calorimeter efficiency
+
** Calorimeter efficiency [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/300 F2 elog 300]
 +
** Trigger efficiency [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/299 F2 elog 299]
 
** Electronic dead time
 
** Electronic dead time
 +
** FADC dead time (100 ns)???
 +
* EMC only
 +
** [https://hallcweb.jlab.org/elogs/X%3E1+%26+EMC/67 Isoscalar corrections]
 +
=== Radiative corrections ===
 +
** [https://wiki.jlab.org/xem2wiki/images/f/f1/Dasu.pdf S.R. Dasu E140 thesis]
 +
** [https://wiki.jlab.org/xem2wiki/images/1/17/Tsai_rc_slac-pub-0848.pdf Yung-Su Tsai SLAC not on radiative corrections]

Latest revision as of 10:47, 6 October 2021

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 (updated from + to - 5/21/2021)
      • y-spec offset = -0.057 cm
      • x-beam offset = (0.073 - x-bpm) cm (xbpm calculated in right handed coordinate system)
      • z-target offset = 0.212 cm (carbon target)
        • LH2 1.55 mm upstream of carbon center: z = 0.057
        • LD2 1.45 mm upstream of carbon center: z = 0.067
        • Be 2.4 mm downstream of carbon center: z = 0.452
        • 10B4C and 11B4C at same z position as carbon: z = 0.212
  • How I get Boron from B4C: [1]

SHMS/HMS Cherenkov Gas Information

  • CO2 at 1 atm was the gas used in the SHMS noble gas Cherenkov.

https://logbooks.jlab.org/entry/3508688

  • The HMS Cherenkov was filled with C4F8O at 0.45 atm.

https://logbooks.jlab.org/entry/3497989

BCM calibration

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

Efficiencies and corrections

Radiative corrections

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