[clas_members] [New Logentry] RC Daily Summary July 9

holtrop at jlab.org holtrop at jlab.org
Sat Jul 9 12:00:01 EDT 2022

Logentry Text:
<p><strong>RC Summary Saturday July 9th</strong></p><p> </p><p>Friday day shift started with data taking, run 16270, 35M events, and 16271,  5.7M events.<br>Friday around 1pm beam started to get poor. MCC worked on the injector.<br>Friday at 2pm We went to controlled access to anneal the target:  https://logbooks.jlab.org/entry/4012891<br>                         The target material was taken out, mixed, allowed to warm up in Argon, then replaced in target cell.<br>Friday at 6pm Target group is done and we close the hall.<br>Friday 6pm - 0am MCC is trying to get the injector problems fixed for us, which were causing high counts on beam halo monitors.</p><p>Saturday owl - Spend most of the night trying to get the raster optimized. <br>Saturday owl - New raster offsets: X = -0.3 Y = 0.4   https://logbooks.jlab.org/entry/4013087   2H01:  (-2.3, 1.8) https://logbooks.jlab.org!
 /entry/4013089 <br>Saturday day - Taking data with 4nA to 50M events. Then another ~3 hours of 50nA, then more 4nA data taking.</p><p>Results from Cold Target Irradiation: <br>Dose calculation,  Chris Keith: approximately 2E15 e-/cm^2  https://logbooks.jlab.org/entry/4012951  <br>Effect on Forward Tagger, Raffaella DeVita: We should not over-raster for 50nA running: https://logbooks.jlab.org/entry/4013181 and https://logbooks.jlab.org/entry/4012927 Target polarization at start of 50nA running was up to 9% after 1 hour of 50nA down tp 5.9%</p><p> </p><p>Summaries:<br>Day: https://logbooks.jlab.org/entry/4012627<br>Swing: https://logbooks.jlab.org/entry/4012856<br>Owl: https://logbooks.jlab.org/entry/4012993<br>Day Saturday: https://logbooks.jlab.org/entry/4013125</p><p> </p><p>Runs: https://clasweb.jlab.org/clas12online/timelines/rg-c/RGC2022_progress_charge.html</p><p>16270  35M events.<br>16271   5.7M events.<br>16273  &nbs!
 p;32M events. 4nA raster optimization in process, still produc!
 tion run.<br>16276   10M events<br>16277   51M events </p><p> </p><p>Total production running charge on ND3 ~ 0.1 mC</p>


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/4013194
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