Wiki-page for E12-11-112
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Overview
E12-011-112 (x>1) at Hall A is proposed to precisely measure the isospin dependence of two-nucleon short range correlations using mirror nuclei 3H and 3He. More details can be found in the PAC38 Proposal and Patricia's web page.
Trigger configuration
- All run were taken at single arm mode ( inclusive e' ).
LHRS (run number <20000):
T1: S0 && S2 T2: (S0 && S2) && Cer T3: (S0 || S2) && Cer
RHRS (run number >90000):
T4: S0 && S2 T5: (S0 && S2) && Cer T6: (S0 || S2) && Cer
Run Periods
Fall 2018
- Beam energy: 5 pass for optics, 2 pass for production.
- Run Plan
- Statistics Summary
- Target report
- Surveys:
Date | LHRS | RHRS |
---|---|---|
09.18.2018 | 17 degree | 24 degree |
10.30.2018 | 28 degree |
- Issues:
- BCM new receiver gain changed during optics run
- wierd BPM Y signal ( seems a noise pickup from beamline, went away by itself [1] [2] )
- PS 25 and SH39 not connected until sept 30
- LQ2 cycle at 1600 A which is lower than the default setting for 3.82 and 3.93 GeV. Since this was how we set up magnets during optics run, live with it.
- LHRS L1A signal is noisy but Trigger rate and ADC gate rate is good (https://logbooks.jlab.org/entry/3602167), fixed during the Oct 9 hall access
- run 3581, 3582 have wrong Q1 current ( 882.8A instead of 875 A)
- suspicious hotspot on raster pattern during the L17-SRC1 runs ( hitting the collimator?)
- RHRS shower gate adjusted on Oct 09, need a new calibration
- Run 3912-3919 LQ1 regulator on
- Raster1 has been off since Oct 14.
- Oct 14 - Oct 20: beam dump vacuum leak, target 15k valve leak, etc...
- Oct 21-23: LQ3 tripped several times. RD quench.
- Starting from run 94026 on RHRS after RD revived, saw noise when T6 turned on. Kept T6 off till the end. This will affect R28-LS, R28-HS, and the inelastic data we took in the last day. ( starting from run 93822 - right after move to 28 degree, s2 trigger eff dropped to ~95%. DR.tS2coinc spectrum different from before).
- small hydrogen contamination in the new Tritium cell.
Spring 2018
- target report
- 2nd pass beam
- Spring run plan and summary spreadsheet
Calibrations
- LHRS sieve runs with 10.6 GeV beam run summary
- Harp Scan logbook
December 2017
- Beam Energy: 1 pass (2.216 GeV)
- Targets: 3H, 3He, 2H, 1H
- Run plan: spreadsheet
Calibration Runs
- BPM
- BCM
- Optics
Run number | Description |
---|---|
757, 758 | LHRS BPM pedestal runs |
90357, 90358 | RHRS BPM pedestal runs |
805 - 810 | LHRS harp scan |
90595- 90600 | RHRS harp scan |
814 - 819 | LHRS BCM calibration |
90604- 90608 | RHRS BCM calibration |
Production Runs
Run number | Angle (degree) | Momentum (GeV) |
---|---|---|
809 - 924 | 17 | 2.0 |
932 - 949 | 22 | 1.805 |
Meetings
How-to Documentation
- How to get most of the scientific software setup in your Jlab CUE
- Getting started with the Hall A analyzer
Links
- Tritium target wiki
- Hall A new logbook
- Hall A web page
- Tritium Collaboration wiki
- Analysis mailing list
- Tritium elog
- Run info from SQL database webpage