Difference between revisions of "2018 Data - Analysis Page"
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* 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 was the gas used in the noble gas | + | CO2 at 1 atm was the gas used in the SHMS noble gas Cherenkov. |
https://logbooks.jlab.org/entry/3508688 | 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=== | ||
Revision as of 23:25, 20 September 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
- 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 %)
- Bill's analysis (HMS tracks?): F2 elog 444
- 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
- Radiative corrections
