Day Shift Summary

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User name Annand

Log entry time 15:53:09 on April11,2011

Entry number 355060

keyword=Day Shift Summary

April 11, 2011

SL: John Annand

TO: Zhihong Ye

3rd: David Hamilton

Day Shift Summary:

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Plan: SRC Producti on 755 MeV/c

Kinematic settings:



    energy = 4.451 GeV 

    left HRS P0 = 3.6014 GeV/c

    left HRS angle = 20.3 degs

    right HRS P0 = 1.19635 GeV/c

    right angle = -24.5 degs

08:00 Continue taking production data; Pmiss = 755 MeV/c

Lost beam at around 8.13....took about 1hr 45min before return

Heidi asked controlled access to check He system on LHRS while beam down

Q1 left was taken down for the check, ramped up again after finish

Beam returned around 9.50, checked position rates spot++ at 1uA

Return to production at 4uA around 10.00

HAND HV tripped off completely around 13.20, ended run 3417. HV off-on cycle seemed to clear fault...response very slow

Run Summary:

Run	Events	I_beam [uA]	BCM U1 [C]	Accumulated Q [C]	Deadtime [%]	Target	Comments
3412	1.0 M	4.0 uA	0.0177	0.0177	9	4He 20 cm	Production
3413	0.07 M	4.1 uA	0.0011	0.0188	9	4He 20 cm	Production
3414	0.04 M	1.0 uA	0.0	0.0188	--	--	Spot++
3415	1.0 M	4.0 uA	0.0176	0.0364	9	4He 20 cm	Production
3416	1.0 M	4.0 uA	0.0175	0.0539	9	4He 20 cm	Production
3417	0.44 M	4.1 uA	0.0078	0.0617	9	4He 20 cm	Production
3418	1.0 M	4.1 uA	0.0176	0.0793	9	4He 20 cm	Production
3419	Current	4.1 uA	--	--	9	4He 20 cm	Production