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User name O.Glamazdin
Log entry time 18:15:20 on February 18, 2011
Entry number 347515
keyword=Moller measurements result
Moller results on February 18, 9:00 - 17:50
- Crew: Jixie, Roman, Sasha,
- Wien filter angle is -64.2°
- The raster was ON.
- The half wave plate was OUT.
- Beam was straight.
- Moller detector HV adjustment for 3 passes energy was done.
- We change a few times helicity board settings.
- Moller energy lock was used. Beam fluctuation was large.
Correction on the beam energy fluctuation is needed.
- Moller FSD problem was fixed(see elog 1569033)
- 12:45-13:30 Controlled access to fix moller rack power problem
(halog 347502)
- Runs 14985-14993: Moller Quad1 scan. Discrepancy between Geant
and measurement is here.
- Runs 14994-15000: Moller Quad3 scan. No difference between GEANT
and measurement.
- Runs 15021-15023: beam charge asymmetry test.
Preliminary results. Correction on the beam
energy fluctuation has to be done.
| # |
Wien angle |
beam |
runs |
target |
Pbeam% |
comments |
| 1 | -62.40° | 0.5
µA | 15001-15006 | 5 | -82.11±0.4
| - |
| 2 | -62.40° | 0.5
µA | 15007-15010 | 4 | -80.21±0.4
| - |
| 3 | -62.40° | 0.4
µA | 15011-15016 | 3 | -80.16±0.3
| - |
| 4 | -62.40° | 0.25
µA | 15017-15020 | 2 | -79.19±0.3
| - |
| Average | -62.40° | -
| 15001-15020 | 2-5 | -79.95±0.15 |
- |
A copy of this log entry has been emailed to: gen@jlab.org