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Looks good to me as well.
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Regards,<br class="">
-David<br class="">
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-------------------------------------------------------------<br class="">
David Lawrence Ph.D.</div>
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Staff Scientist - - EPSCI Group Lead<br class="">
Thomas Jefferson National Accelerator Facility<br class="">
Newport News, VA<br class="">
<a href="mailto:davidl@jlab.org" class="">davidl@jlab.org</a><br class="">
(757) 269-5567 W<br class="">
(757) 746-6697 C<br class="">
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<div class="">On Jun 23, 2022, at 9:25 AM, miskimen <<a href="mailto:miskimen@physics.umass.edu" class="">miskimen@physics.umass.edu</a>> wrote:</div>
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<div dir="auto" class="">Hi Elton, this looks like a reasonable plan for both full and empty target running. Rory<br class="">
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<div dir="ltr" class="">Sent from my iPad</div>
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<blockquote type="cite" class="">On Jun 23, 2022, at 8:29 AM, Elton Smith <<a href="mailto:elton@jlab.org" class="">elton@jlab.org</a>> wrote:<br class="">
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<div dir="ltr" class=""> I received some feedback from Sean, Curtis, Alexandre and Alexander regarding the amount of amorphous radiator data needed.
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<div class="">Another reason for having empty target data that I had overlooked is that it proves very useful for MONITORING. For example, see Alexandre’s log entry <a href="https://logbooks.jlab.org/entry/4006041" class="">https://logbooks.jlab.org/entry/4006041</a>.
Alexander points out that we need regular amorphous data in order to normalize the coherent peak spectrum, which is used for monitoring during data taking. The consensus is that we may not need as much data as was taken for GlueX. Let me make the following
proposal for the taking full-target data:</div>
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<div class="">Sequence for Full-Target Data</div>
<div class=""><span style="caret-color: rgb(49, 49, 49); color: rgb(49, 49, 49); font-family: "Trebuchet MS", "Helvetica Neue", Arial, Helvetica, sans-serif; font-size: 14.000000953674316px; background-color: rgb(255, 255, 255);" class="">Diamond 45(2h)/ Diamond
45(2h)/Diamond 135(2h)/Diamond 135(2h)/AMO(0.5 h). That results in 0.5/8.5h = 6% of time allocated to amorphous running. It also makes sure that we take the data uniformly through the running period.</span></div>
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</span></div>
<div class=""><span style="background-color: rgb(255, 255, 255);" class=""><font color="#313131" face="Trebuchet MS, Helvetica Neue, Arial, Helvetica, sans-serif" class=""><span style="caret-color: rgb(49, 49, 49); font-size: 14.000000953674316px;" class="">I
am inclined to continue the SAME sequence of data taking for empty target, including the amorphous running, so that we have consistent sets between full and empty. </span></font></span></div>
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</span></font></span></div>
<div class=""><span style="background-color: rgb(255, 255, 255);" class=""><font color="#313131" face="Trebuchet MS, Helvetica Neue, Arial, Helvetica, sans-serif" class=""><span style="caret-color: rgb(49, 49, 49); font-size: 14.000000953674316px;" class="">Thoughts/comments?</span></font></span></div>
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</span></font></span></div>
<div class=""><span style="background-color: rgb(255, 255, 255);" class=""><font color="#313131" face="Trebuchet MS, Helvetica Neue, Arial, Helvetica, sans-serif" class=""><span style="caret-color: rgb(49, 49, 49); font-size: 14.000000953674316px;" class="">Cheers,
Elton</span></font></span></div>
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<div class="">------------------------------------</div>
<div class="">Elton Smith</div>
<div class="">Jefferson Lab MS 12H3</div>
<div class="">12000 Jefferson Ave STE 4</div>
<div class="">Newport News, VA 23606</div>
<div class="">(757)269-7625</div>
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<div class="">On Jun 22, 2022, at 5:31 PM, Sean Dobbs <<a href="mailto:sdobbs@jlab.org" class="">sdobbs@jlab.org</a>> wrote:</div>
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<div dir="ltr" class="">Hi Elton,
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<div class="">Another thing we use the amorphous data for is to evaluate instrumental asymmetries. This may be something to be concerned about since you're looking at tracks at small angles, but I also agree that for this you probably need less data than we
have been taking.</div>
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<div class="">Cheers,</div>
<div class="">Sean</div>
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<div dir="ltr" class="gmail_attr">On Wed, Jun 22, 2022 at 5:05 PM Curtis A. Meyer <<a href="mailto:cmeyer@cmu.edu" class="">cmeyer@cmu.edu</a>> wrote:<br class="">
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<div style="word-wrap:break-word;line-break:after-white-space" class="">Hi Elton,
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<div class=""> I think we have used the amorphous data to also check systematics when we analyze data away from the coherent peak. My guess is you probably need less than GlueX.</div>
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<div class="">Curtis<br class="">
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A. Meyer</span><span class=""> </span>|<span class=""> </span><span style="font-size:1.2em;line-height:1.2em" class="">MCS Associate Dean for Research<span class=""> </span><br class="">
The Otto Stern Professor of Physics<span class=""> </span></span><br class="">
<a href="mailto:cmeyer@cmu.edu" style="color:rgb(71,124,204);text-decoration:none;display:inline" target="_blank" class="">cmeyer@cmu.edu</a><span class=""> </span>|<span class=""> </span>412 260 6290</span>
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<span style="color:rgb(33,33,33)" class="">5000 Forbes Ave., Pittsburgh PA, 15213</span><span class=""> </span><br class="">
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<div class="">On Jun 22, 2022, at 16:57, Elton Smith <<a href="mailto:elton@jlab.org" target="_blank" class="">elton@jlab.org</a>> wrote:</div>
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<div class="">Dear Hovanes, Mike, and others,<br class="">
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The CPP experiment has been considering how much data should be taken with the amorphous radiator and wanted to get your input. As you know, for GlueX we collected about 10% of the triggers on the amorphous radiator.
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As, I understand it, the main arguments for collecting data with an amorphous radiator are a) to be able to normalize the coherent spectrum and b) check systematics of the polarization. We need very little data for a), but how much data we need to address
b)? Also, if there are other used for the amorphous radiator data, please send us feedback.
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We have already started taking data that can be considered production and all of it was taken using polarized beam. We will want to make a plan regarding how much amorphous radiator data we take so that it is interspersed with diamond radiator data. At the
moment, we do not anticipate using the amorphous radiator data in the physics analyzes for CPP nor NPP. <br class="">
<br class="">
Thanks, Elton.<br class="">
<br class="">
<br class="">
------------------------------------<br class="">
Elton Smith<br class="">
Jefferson Lab MS 12H3<br class="">
12000 Jefferson Ave STE 4<br class="">
Newport News, VA 23606<br class="">
(757)269-7625<br class="">
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