Log entry time 00:02:51 on November 29, 2010

Entry number 341869

Crew:
C. Hyde (SL) and (TO)
R. Beminiwattha (3rd)

Summary:
Compton rates high, beam energy unstable
Energy lock on Hall C
Kin-I Low LH2 target

Timeline:

• 16:00 Run 9059 in progress LH2 Target
• 16:26 Start Compton run 24317
• 16:39 Start Run 9060 in progress LH2 Target
• 16:40 Start Compton run 24318
• 17:14 Start Compton run 24319
• 18:00 MCC is working on phase oscillation. Linac is off crest. requested to turn down Compton HV to -1650 V
• 18:04 Start Compton run 24321
• 18:15 Compton HV back to -1750 V
• 18:18 Start Compton run 24322
• 19:00 Hall C off
• 19:15 Checklist
• 19:17 low level flammable gas alarm in Gas Shed
• 19:40 Start Run 9063 LH2 Target
• 19:45 Compton Run 24325 rates look good
• 20:00 Hall C on
• 19:55 rebooted IOC for DVCS Calo Readback
• 21:05 Replay of first split of run 9063 does not show anomalous DTC
• 23:05 Reported to MCC ABU=7.05, BANU=0.12

• Run Events BCM U3 D3 (C) Time Acg Curr Deadtime(%)
• 9059 247 k 0.00771 0.00852 60.2 mins 2.2456 uA 6.02
• 9060 300 k 0.01005 0.01105 59.7 mins 2.9437 uA 6.43
• 9061 284 k 0.00941 0.01034 59.6 mins 2.7613 uA 6.46
• 9062 260 K
• 9063 1361 k 0.01026 0.01130 59.8 mins 3.0039 uA 77.38
• 9064 308 k 0.01043 0.01147 59.7 mins 3.0563 uA 6.36
• 9065 300 k 0.01003 0.01109 60.1 mins 2.9264 uA 9.18
• 9066 298 k 0.01001 0.01102 59.1 mins 2.9674 uA 7.21