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I had a meeting with Bob and Chris. They started looking into the layout of the HyCal experiments.</div>
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They have a few questions which we need to answer. We'll need to talk about it at tomorrow's meeting. </div>
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-Eugene</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Bob Miller <rmiller@jlab.org><br>
<b>Sent:</b> Tuesday, November 14, 2023 13:37<br>
<b>To:</b> Eugene Pasyuk <pasyuk@jlab.org><br>
<b>Cc:</b> Christopher Guthrie <guthrie@jlab.org><br>
<b>Subject:</b> PRad II Questions</font>
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<p>Hi Eugene,</p>
<p>Here are the questions that we have for PRad II, X17, and TFF.</p>
<p>Thanks,</p>
<p>Bob<br>
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<p class="x_MsoNormal">GEM detectors</p>
<p class="x_MsoListParagraphCxSpFirst" style="text-indent:-.25in"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="">
</span></span></span>What size are the GEM detectors, length, width, height?</p>
<p class="x_MsoListParagraphCxSpMiddle" style="margin-left:1.0in; text-indent:-.25in">
<span style=""><span style="mso-list:Ignore">o<span style=""> </span></span></span>Provide a CAD model if possible</p>
<p class="x_MsoListParagraphCxSpMiddle" style="text-indent:-.25in"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="">
</span></span></span>What size is the helium bag?</p>
<p class="x_MsoListParagraphCxSpMiddle" style="text-indent:-.25in"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="">
</span></span></span>What are the GEMS bolted to?</p>
<p class="x_MsoListParagraphCxSpMiddle" style="margin-left:1.0in; text-indent:-.25in">
<span style=""><span style="mso-list:Ignore">o<span style=""> </span></span></span>Hycal detector for calibration?</p>
<p class="x_MsoListParagraphCxSpLast" style="margin-left:1.0in; text-indent:-.25in">
<span style=""><span style="mso-list:Ignore">o<span style=""> </span></span></span>Hycal stand?</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">Prad II</p>
<p class="x_MsoListParagraph" style="text-indent:-.25in"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="">
</span></span></span>What is the acceptance in theta, and the location of the target and Hycal along the beam line?</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">X17</p>
<p class="x_MsoListParagraphCxSpFirst" style="text-indent:-.25in"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="">
</span></span></span>What is the acceptance in theta, min and max, and the location of the target and Hycal along the beam line?</p>
<p class="x_MsoListParagraphCxSpMiddle" style="text-indent:-.25in"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="">
</span></span></span>Is it beneficial to have the target closer to Hycal and only use the small vacuum tank with a 1 meter diameter window?</p>
<p class="x_MsoListParagraphCxSpMiddle" style="text-indent:-.25in"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="">
</span></span></span>Beam tube connected to the window </p>
<p class="x_MsoListParagraphCxSpMiddle" style="margin-left:1.0in; text-indent:-.25in">
<span style=""><span style="mso-list:Ignore">o<span style=""> </span></span></span>Is this beneficial for X17, or does it cause more background at low angles?</p>
<p class="x_MsoListParagraphCxSpMiddle" style="margin-left:1.5in; text-indent:-.25in">
<span style="font-family:Wingdings"><span style="mso-list:Ignore">§<span style="">
</span></span></span>Should the beam tube be removed and just have a full size window 0.032” thick</p>
<p class="x_MsoListParagraphCxSpMiddle" style="margin-left:2.0in; text-indent:-.25in">
<span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="">
</span></span></span>Is it better to just have a thin window on the helium bag and have the electron beam go through the helium</p>
<p class="x_MsoListParagraphCxSpLast" style="margin-left:1.0in; text-indent:-.25in">
<span style=""><span style="mso-list:Ignore">o<span style=""> </span></span></span>If used, should it be smaller to allow more acceptance at lower angles?</p>
<p class="x_MsoNormal" style="margin-left:.25in"> </p>
<p class="x_MsoNormal" style="margin-left:.25in">TFF</p>
<p class="x_MsoListParagraph" style="text-indent:-.25in"><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="">
</span></span></span>What is the acceptance in theta, min and max, and the location of the target and Hycal along the beam line?</p>
<p></p>
<pre class="x_moz-signature" cols="72">--
Bob Miller
Hall B Lead Engineer
Jefferson Lab
757 822-9586
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