[Halla_running] [New Logentry] RC daily update

[shujie at jlab.org]

Logentry Text:
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Run summary:
In the past 24 hours we accumulated about 10 hours of beam on Tritium for the e'K experiment. MCC took beam away from 1pm-5pm for system recovery. There will be no system recovery or any other scheduled beam down until the experiment finishes on the coming Wednesday. 

MCC:
There were some vacuum issues but got fixed.

Hall:
It's a known issue that very time we move the target, vacuum went bad, ladder temperature fluctuated, but quickly recovered by themselves. However, according to JP this heat leak is getting worse. (https://logbooks.jlab.org/entry/3626767). For now the plan is to stay at Tritium target over the weekend, except moving to carbon hole for necessary beam centering.

Plan:
We will continue taking production data until the experiment ends at 7am Wednesday (Nov 21st). Between 7-8 am we will take some high momentum hydrogen elastic data ( no HRS move, only momentum change) for optics calibration. Then we will install the sieve slits and drop to phase 2 (no gas cell, max current 40 uA, raster on) , so that MCC can do their high current test while we can collect some raster on optics data. Beam will be off at 10am.  



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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/3627139
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