[Hallc_running] [New Logentry] RC Daily Update

cyero at jlab.org cyero at jlab.org
Thu Feb 23 08:15:02 EST 2023


Logentry Text:
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Changed to Au SRC kinematics yesterday ~ 9 pm, and started taking data on Au for remaining of CaFe run, (~ 8 AM Friday)

The average count rate has been 0.035 SRC counts/ sec @ ~ 30-35 uA, which gives 126 counts / hr (or 1008 counts / 8hr-shift)
We currently have a total 664 of counts as of 5 am, today.  As of now, we have 3 shifts remaining ( or 1008 * 3 = 3024 counts),
which means we will end up with ~ 3700 counts assuming 100 % beam efficiency @ 35 uA,  or more realistically, 1850 counts @ 50% beam efficiency.

Our MUST stats goal for this setting is 3K, ---> 1850 / 3000 = 61.4 % of stats collected

There is hope, however, . . .

During MCC meeting this morning, I asked If we could get higher current, and they agreed, and will give it a try,
since Hall A will need to make an access today.   Depending on how high of a current they give, we may be able
to complete our minimum stats goal.

Also, Ops will need to make an access to North Linac (~ 1 hr) for some checks + accelerator recovery afterwards,
so they could have smooth running over weekend.  The best time for this would be tomorrow at ~8:30 AM, since
at that time we will be changing kinematics from CaFe to deuteron experiment.






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This is a plain text email for clients that cannot display HTML.  The full logentry can be found online at https://logbooks.jlab.org/entry/4137303
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