Owl Shift Summary

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User name danez

Log entry time 07:58:26 on March 17, 2011

Entry number 352250

keyword=Owl Shift Summary

SL: David Anez
TO: Konrad Aniol
3rd: Sophia Iqbal

Owl Shift Summary
=================
Plan: SRC Triple Coincidence Runs

Kinematic Settings

Beam Energy: 4453 GeV
Left HRS: 3601 MeV/c, 20.3 degrees
Right HRS: 1383 MeV/c, 33.5 degrees
Target: 20cm He4 / 10cm LD2
Current: 13 uA / 3.5 uA
Prescales:

T1 = 40 / 95
T2 = 1
T3 = 1
T4 = 1
T5 = 1
T6 = 0
T7 = 0
T8 = 400

Please note that all times are approximate
00:00	Taking production runs on 20cm He4, beam at 13 uA.
01:00	MCC turned off beam to prepare for high current to Hall C.
01:10	Beam back, continued production.
02:20	MCC called to say they're having trouble with Hall C's beam, beam will be down.
	Switched to 10cm LD2 target for short run when beam returns.
02:30	Beam back, changed prescales and started 30 min run on LD2.
03:15	Switched back to 20cm He4 target to continue production.
07:00	Went to controlled access with a full survey in preparation for target work.
07:30	Survey done.
08:00	Turned things over to Day Shift.

Run	Events	Time [mins]	Current [uA]	Deadtime [%]	Target	Comments
2884	954332	71.218	13	6.81	20cm He4	production run, stopped early when MCC shut down beam
2885	767235	62.804	13	6.59	20cm He4	production run, stopped early when MCC shut down beam
2886	707833	35.583	3.5	9.79	10cm LD2	deuterium run
2887	998606	71.255	13	6.71	20cm He4	production run
2888	998206	83.940	13	6.67	20cm He4	production run
2889	917409	65.994	13	6.73	20cm He4	production run, stopped early to go to controlled access

General Comments

Left dipole NMR still on the fritz, locking and unlocking on a whim.
Three HAND PMTs tripping. Two have had their HV lowered, and were good until about 7am.