[Hallc_running] [New Logentry] RC Daily Update

cyero at jlab.org cyero at jlab.org
Sat Jun 18 07:35:02 EDT 2022


Logentry Text:
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The accelerator has been able to deliver ~ 45 uA since yesterday Swing shift (Jun 17 Swing), which has
enabled the shift crew/experts to move forward with the run plan:

1)  pionLT optics checkout completed (Jacob verified 200 counts / hole / foil)

2) coincidence trigger checkout was completed during late Jun 17 Swing / Early Owl shift  --> https://logbooks.jlab.org/entry/4004019

3) On-going H(e,e'p) coincidence, which needs ~10,000 counts, and as of 6 am they have ~5400 events (expected to be completed during day Shift)

4) Then, finally, pionLT production will be able to start sometime during today Jun 18 Day Shift

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Some issues that have happened over the previous shift are:

1) During early Owl, shift crew noticed pTRIG5 (coin. trigger HMS EL-REAL + SHMS 3/4) was missing. 
This was determined by Brad to be a faulty delay module and module was replaced -->  https://logbooks.jlab.org/entry/4004101

2)There was also a report of an issue with TDC errors in the replay, but these were found to be an insignificant fraction, and most 
likely due to a noise burst which caused the TDCs to reject hits due to exceeding its buffer --> https://logbooks.jlab.org/entry/4004102

3) Jacob noticed a discrepancy between estimates and reality in the SHMS singles and coincidence rates for H(e,e'p) --> https://logbooks.jlab.org/entry/4004139

We'll have a brief RC meeting today @ 11 am to discuss the plan moving forward with the run plan.
Zoom link: https://jlab-org.zoomgov.com/j/1607100885?pwd=ZFBsRTFsYm5Zb0laZ0tyZXNjcEE0QT09


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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/4004203
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