Swing Shift Summary Feb. 23, 2011

NEXT
Make New Entry, Make Followup Entry

User name V. Sulkosky

Log entry time 00:02:01 on February 24, 2011

Entry number 348357

keyword=Swing Shift Summary Feb. 23, 2011

February 23, 2011
SL: Vincent Sulkosky
TO: V. Bellini
3rd: F. Garibaldi

Swing Shift Summary:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Plan: HAND Efficieny Measurement
Kinematic settings:

    energy = 3.355 GeV 
    left HRS P0 = 3.114 GeV/c
    left HRS angle = 14 degs
    right HRS P0 = 0.488 GeV/c
    right angle = -33.5 degs

16:00 Begin taking neutron efficiency data Pmiss = 488 MeV/c
17:07 Changed T3 delay from 72 to 0 ns.
17:35 Changed T3 delay back to 72 ns.
Reduced current to 3 uA.
18:04 Hall C starting large charge asymmetry test.
18:17 Ask Controlled access for trigger work; right P0 changed to 478 MeV/c.
19:10 Back to Beam permit.
19:14 MCC ready to send beam back.
19:21 3 uA on LD2 target.
19:34 Cycle Q3 properly: twice to 1100 A and then turn regulation on.
19:49 Turned regulator on for right Q3.
19:52 Resume neutron efficiency running at 3 uA.
20:24 Asked MCC to give us 5 uA of current.

Run Summary:

Run	Events	CODA Rate [Hz]	T5 Rate [Hz]	Time [mins]	Average Beam Current	Deadtime [%]	Target	Comments
1774	225 k	100	60	45	6.4 uA	6.3	LD2 4 cm	Neutron eff
1775	160 k	100	64	30	6.4 uA	6.8	LD2 4 cm	Neutron eff
1776	137 k	100	62	26.4	6.4 uA	6.9	LD2 4 cm	Neutron eff; T3 delay 0 ns
1777	60 k	35	21	28.5	3.1 uA	5.9	LD2 4 cm	Neutron eff; T3 delay 76 ns
1778	25.5k	35	18	15.2	3.1 uA	8.0	LD2 4 cm	Neutron eff; Hall C large Qasy run
1779	40 k	61	43	10.5	3.1 uA	10	LD2 4 cm	Neutron eff
1780	109 k	65	39	30.5	3.1 uA	7.0	LD2 4 cm	Neutron eff
1781	244 k	130	100	30.4	5.2 uA	8.0	LD2 4 cm	Neutron eff
1782	580 k	275	100	35.2	5.2 uA	10	LD2 4 cm	Neutron eff
1783	544 k	275	100	33.0	5.2 uA	10	LD2 4 cm	Neutron eff
1784	692 k	268	98	43.0	5.1 uA	9.8	LD2 4 cm	Neutron eff
1785	566 k	274	100	34.4	5.2 uA	10	LD2 4 cm	Neutron eff
1786	527 k	275	100	32.0	5.2 uA	10	LD2 4 cm	Neutron eff