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 = | + | *** 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 | + | ** Bill's analysis (HMS tracks?): [https://hallcweb.jlab.org/elogs/E12-10-002+Preparations/444 F2 elog 444] |
− | ** LD2 | + | ***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] | + | ** 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
- 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