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<a href="https://logbooks.jlab.org/entry/3926253" rel="bookmark" style="font-size: 1.6em; font-family: "Trebuchet MS", "Helvetica Neue", Arial, Helvetica, sans-serif;">RC Update and plan for swing and owl</a><br>
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<p class="author-datetime">Lognumber <a href="https://logbooks.jlab.org/entry/3926253" class="lognumber">
3926253</a>. Submitted by <a href="https://logbooks.jlab.org/user/pking">pking</a> on
<time datetime="2021-10-16T19:52:20-0400"><a href="https://logbooks.jlab.org/entries?start_date=1634424740&end_date=1634431940&book=HALOG">Sat, 10/16/2021 - 19:52</a></time>.
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<th>Logbooks: </th>
<td><a href="https://logbooks.jlab.org/book/halog">HALOG</a></td>
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<p>Since this morning, we have completed our series of runs on LH2 at different beam currents with SBS set to 100% field. The list of runs is at the bottom of the message.</p>
<p>At about 17:00, we changed the SBS setting to 50% (<a href="https://logbooks.jlab.org/entry/3926154">https://logbooks.jlab.org/entry/3926154</a>,
<a href="https://logbooks.jlab.org/entry/3926172">https://logbooks.jlab.org/entry/3926172</a>, and
<a href="https://logbooks.jlab.org/entry/3926189">https://logbooks.jlab.org/entry/3926189</a>). We changed our beam position from Y=0.9 to Y=0.7 to be centered on the 2mm hole target; this was reversing about half of the change needed to go from zero field
to full field (<a href="https://logbooks.jlab.org/entry/3926196">https://logbooks.jlab.org/entry/3926196</a>).</p>
<p>We then put the LD2 target into beam, and OPS performed the ion chamber calibration for it.</p>
<p>We are currently taking an hour of data on the LD2 target with a beam current of 2.5uA. After this we will switch back to LH2 with 5uA of beam current.</p>
<p>*** I plan to have an RC meeting tomorrow at 3:15pm to discuss our final two shifts using 1-pass beam. ***</p>
<p><br>
</p>
<p>Plan for tonight through tomorrow morning<br>
================================<br>
Runs should be about an hour long; you can use the whiteboard to keep track of how much time we have on each target.<br>
1) Take 4 hours of data on the LH2 target with 5 uA of beam current.<br>
2) Take 2 hours of data on the LD2 target with 2.5uA of beam current<br>
3) Continue to repeat steps (1), (2), and (3).</p>
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<p>Run list for the beam current scans with SBS at 100% field<br>
============================================<br>
Run 11207: LH2, 1uA beam current, BBCal threshold -250mV, PS1==1, PS2==2</p>
<p>Run 11208: LH2, 2uA beam current, BBCal threshold -250mV, PS1==1, PS2==2, others off<br>
Run 11212: LH2, 2uA beam current, BBCal threshold -250mV, PS1==1, PS2==2, others off<br>
Run 11214: LH2, 2uA beam current, BBCal threshold -250mV, PS1==1, PS2==2, others off</p>
<p>Run 11215: LH2, 3uA beam current, BBCal threshold -250mV, PS1==1, PS2==2, others off</p>
<p>Run 11216: LH2, 3uA beam current, BBCal threshold -262mV, PS1==1, others off<br>
Run 11218: LH2, 3uA beam current, BBCal threshold -262mV, PS1==1, others off<br>
Run 11219: LH2, 3uA beam current, BBCal threshold -262mV, PS1==1, others off; GMN1_pedestal (no zero suppression)</p>
<p>Run 11224: LH2, 4uA beam current, BBCal threshold -262mV, PS1==1, others off<br>
Run 11226: LH2, 4uA beam current, BBCal threshold -262mV, PS1==1, others off</p>
<p>Run 11228: LH2, 5uA beam current, BBCal threshold -262mV, PS1==1, others off</p>
<p>Run 11229: LH2, 5uA beam current, BBCal threshold -274mV, PS1==1, others off<br>
Run 11230: LH2, 5uA beam current, BBCal threshold -274mV, PS1==1, others off<br>
Run 11235: LH2, 5uA beam current, BBCal threshold -274mV, PS1==1, others off</p>
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