Owl Shift Summary

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User name danez

Log entry time 08:29:55 on February 25, 2011

Entry number 348549

keyword=Owl Shift Summary

SL: David Anez
TO: Vincenzo Bellini
3rd: Raffaele De Leo

Owl Shift Summary
=================
Plan: HAND Efficiency Measurement

Kinematic Settings

Beam Energy: 3.355 GeV
Left HRS: 3.100 GeV/c, 15.0 degrees
Right HRS: 0.585 GeV/c, 44.0 degrees
Target: 4cm LD2
Current: 14 µA
Prescales:

T1 = 500
T2 = 0
T3 = 220
T4 = 0
T5 = 1
T6 = 0
T7 = 0
T8 = 0

0:00	Taking neutron calibration runs
0:20	Tai changed BB HV settings
0:50	Tai changed BB HV settings
0:55	CODA crashed - BBTS1 not responding - CODA restarted
1:37	IA/Pocket Cell turned off as per Hall C request
1:55	Tai changed BB HV settings
2:20	BB HV turned off
2:25	Increased beam current to 30 µA
2:28	Decreased beam current to 25 µA
2:33	Decreased beam current to 20 µA
4:30	Power outage, everything tripped

5:00	Kaylan arrived
5:45	JP arrived
7:08	Another short power interruption
7:10	Techs arrived

Run	Events	Time [mins]	Average Beam Current	Deadtime [%]	Target	Comments
1825	135k	5	15	8	4cm LD2	BB Threshold change - run stop
1826	916k	29	15	15	4cm LD2	New BB Threshold (4.0 4.5)
1827	---	5	15	---	4cm LD2	Junk
1828	1002k	32	15	16	4cm LD2	New BB Threshold (4.5 5.0)
1829	733	25	15	15	4cm LD2	New BB Threshold (4.5 5.0)
1830	---	29	15	15	4cm LD2	New Bb Threshold (5.0, 5.5)
1831	---	1	30	40	4cm LD2	Junk
1832	---	1	30	40	4cm LD2	Junk
1833	1444k	34	20	23	4cm LD2
1834	1607k	38	20	22	4cm LD2
1835	1386k	31	20	22	4cm LD2	Failure in power supply