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User name X. Zheng

Log entry time 16:00:15 on June16,2009

Entry number 281739

keyword=Day shift summary

10:30 tuned beam in hall with raster on. Until 10:44, runs 3644-3647 and 22497-22500 for spot check. Now using MCC unit 6x6.4 raster size for a 4x4mm^2 spot on target.

11:00-11:15 some CW beam (5-20uA)
11:15-12:10 Compton tune
12:10- CW beam (up to 35uA)

15:20 Insterted Beam HWP

Run list:

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Beam energy: 6.064 GeV
LHRS 3.6 GeV/c, 14 deg
RHRS 2.63 GeV/c, 18 deg
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until 3647/22500: spot check or tuned beam

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tagger enabled, beam HWP out
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3648/22501 with 5-20uA CW beam, #events 740K/362K, beam helicity missing

3649/22502 tuned beam again;

3650/22503 short run for helicity check (first run with target helicities enabled)

HAPPEX run 31540 started 12:14
3651/22504 5-35uA CW, #events 1M/500K, LHRS end run failed
3652/22505 up to 40uA, #events 2M/1M, LHRS end run failed
3653-3656 and 22506-22509 short runs with high deadtime (all previous runs also had high deadtime)
HAPPEX run 31540 ended 13:22

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tagger dis-abled, beam HWP out
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HAPPEX run 31541 started 13:23
3657/22510 #events 280k/210k good
3658/22511 junk no beam
3659/22512 450k/360k good
3660/22513 3M/2.2M good, first run with leftHRS config on LHRS
HAPPEX run 31541 ended 15:19

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tagger en-abled, beam HWP IN
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HAPPEX run 31542 started 15:20
3662 2.4M good, 22516 end run failed, no data at all (junk)
3663/22517 continue to next shift