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<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Just to be clear, the higher current is only because Hall A is down.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">The limit isn’t really current to one hall, it is the total power and that machine isn’t able to get beyond 700-800 kW. As soon as Hall A is back then the available power will be shared. (i.e. the 35-40
uA that you have been seeing).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">NOTE: There have also been other issues that can limit the current, but power is the one we have been fighting with the most this run period.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">From:
</span></b><span style="font-size:12.0pt;color:black">Hallc_running <hallc_running-bounces@jlab.org> on behalf of Carlos Yero via Hallc_running <hallc_running@jlab.org><br>
<b>Date: </b>Thursday, February 23, 2023 at 8:15 AM<br>
<b>To: </b>Dien Nguyen <dien@jlab.org>, hallc_running@jlab.org <hallc_running@jlab.org>, weinstei@jlab.org <weinstei@jlab.org><br>
<b>Subject: </b>[Hallc_running] [New Logentry] RC Daily Update<o:p></o:p></span></p>
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<h1><span style="font-size:15.0pt;font-family:"Trebuchet MS",sans-serif;color:#555555"><a href="https://logbooks.jlab.org/entry/4137303">RC Daily Update</a>
<o:p></o:p></span></h1>
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<p class="author-datetime1"><span style="font-size:8.5pt;font-family:"Trebuchet MS",sans-serif;color:#555555">Lognumber
<a href="https://logbooks.jlab.org/entry/4137303">4137303</a>. Submitted by <a href="https://logbooks.jlab.org/user/cyero">
cyero</a> on <a href="https://logbooks.jlab.org/entries?start_date=1677154309&end_date=1677161509&book=HCLOG">
Thu, 02/23/2023 - 08:11</a>. <o:p></o:p></span></p>
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<span style="font-size:8.5pt;font-family:"Trebuchet MS",sans-serif"><a href="https://logbooks.jlab.org/book/hclog">HCLOG</a><o:p></o:p></span></p>
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<span style="font-size:8.5pt;font-family:"Trebuchet MS",sans-serif">cyero<o:p></o:p></span></p>
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<p><span style="font-size:9.5pt;font-family:"Trebuchet MS",sans-serif;color:#555555">Changed to Au SRC kinematics yesterday ~ 9 pm, and started taking data on Au for remaining of CaFe run, (~ 8 AM Friday)<o:p></o:p></span></p>
<p><span style="font-size:9.5pt;font-family:"Trebuchet MS",sans-serif;color:#555555">The average count rate has been 0.035 SRC counts/ sec @ ~ 30-35 uA, which gives 126 counts / hr (or 1008 counts / 8hr-shift)<br>
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),<br>
which means we will end up with ~ 3700 counts assuming 100 % beam efficiency @ 35 uA, or more realistically, 1850 counts @ 50% beam efficiency.<o:p></o:p></span></p>
<p><span style="font-size:9.5pt;font-family:"Trebuchet MS",sans-serif;color:#555555">Our MUST stats goal for this setting is 3K, ---> 1850 / 3000 = 61.4 % of stats collected<o:p></o:p></span></p>
<p><span style="font-size:9.5pt;font-family:"Trebuchet MS",sans-serif;color:#555555">There is hope, however, . . .<o:p></o:p></span></p>
<p><span style="font-size:9.5pt;font-family:"Trebuchet MS",sans-serif;color:#555555">During MCC meeting this morning, I asked If we could get higher current, and they agreed, and will give it a try,<br>
since Hall A will need to make an access today. Depending on how high of a current they give, we may be able<br>
to complete our minimum stats goal.<o:p></o:p></span></p>
<p><span style="font-size:9.5pt;font-family:"Trebuchet MS",sans-serif;color:#555555">Also, Ops will need to make an access to North Linac (~ 1 hr) for some checks + accelerator recovery afterwards,<br>
so they could have smooth running over weekend. The best time for this would be tomorrow at ~8:30 AM, since<br>
at that time we will be changing kinematics from CaFe to deuteron experiment.<o:p></o:p></span></p>
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