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<p style="margin-top:0;margin-bottom:0">Hi, Tim,</p>
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<p style="margin-top:0;margin-bottom:0">I would be great if you could double check it.</p>
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<p style="margin-top:0;margin-bottom:0">Liping</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Timothy Whitlatch <whitey@jlab.org><br>
<b>Sent:</b> Thursday, February 28, 2019 6:19:25 PM<br>
<b>To:</b> Gan, Liping<br>
<b>Cc:</b> Simon Taylor; Ilya Larin; Shepherd, Matthew; Ashot Gasparian; primexd@jlab.org; andrsmit@jlab.org; GlueX Collaboration; Mark Stevens<br>
<b>Subject:</b> Re: [GlueX] Target installation plan</font>
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<div dir="auto">Hi All,
<div>The FCAL was surveyed fall 2018. The data can be found on the “O” drive halld_engineering/alignment/Fall 2019. I can check it in the morning.<br>
<br>
<div id="x_AppleMailSignature" dir="ltr">Tim</div>
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On Feb 28, 2019, at 3:35 PM, Gan, Liping <<a href="mailto:ganl@uncw.edu">ganl@uncw.edu</a>> wrote:<br>
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<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">Hi, Matt,</span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif"> </span></p>
<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">Do you know if FCAL position has been changed since 2015 survey?</span></p>
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<p class="x_MsoNormal"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">Liping
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<p class="x_MsoNormal"><b><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt; font-family:"Calibri",sans-serif"> GlueX-Collaboration <<a href="mailto:gluex-collaboration-bounces@jlab.org">gluex-collaboration-bounces@jlab.org</a>>
<b>On Behalf Of </b>Simon Taylor<br>
<b>Sent:</b> Thursday, February 28, 2019 3:23 PM<br>
<b>To:</b> Ilya Larin <<a href="mailto:ilarin@jlab.org">ilarin@jlab.org</a>>; Shepherd, Matthew <<a href="mailto:mashephe@indiana.edu">mashephe@indiana.edu</a>>; Ashot Gasparian <<a href="mailto:gasparan@jlab.org">gasparan@jlab.org</a>><br>
<b>Cc:</b> <a href="mailto:primexd@jlab.org">primexd@jlab.org</a>; <a href="mailto:andrsmit@jlab.org">
andrsmit@jlab.org</a>; GlueX Collaboration <<a href="mailto:gluex-collaboration@jlab.org">gluex-collaboration@jlab.org</a>>; Mark Stevens <<a href="mailto:stevensm@jlab.org">stevensm@jlab.org</a>><br>
<b>Subject:</b> Re: [GlueX] Target installation plan</span></p>
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<p><span style="font-family:"Calibri",sans-serif; color:black">For what it's worth, according to the 2015 survey (I am not sure if the FCAL was resurveyed at a later date), the FCAL as a whole is off in x by about +5mm, but only a tiny amount off from zero
in y.</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black"> </span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black">In the attachment the highlighted numbers are z,x,y in meters.</span></p>
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<p><span style="font-family:"Calibri",sans-serif; color:black">Simon</span></p>
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<p class="x_MsoNormal"><b><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">From:</span></b><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black"> GlueX-Collaboration <</span><a href="mailto:gluex-collaboration-bounces@jlab.org"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">gluex-collaboration-bounces@jlab.org</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">>
on behalf of Ilya Larin <</span><a href="mailto:ilarin@jlab.org"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">ilarin@jlab.org</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">><br>
<b>Sent:</b> Thursday, February 28, 2019 2:58:38 PM<br>
<b>To:</b> Shepherd, Matthew; Ashot Gasparian<br>
<b>Cc:</b> </span><a href="mailto:primexd@jlab.org"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">primexd@jlab.org</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">;
</span><a href="mailto:andrsmit@jlab.org"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">andrsmit@jlab.org</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">; GlueX Collaboration; Mark Stevens<br>
<b>Subject:</b> Re: [GlueX] Target installation plan</span><span style="font-family:"Calibri",sans-serif; color:black">
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<p><span style="font-family:"Calibri",sans-serif; color:black"> Hi Matt,</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black"> </span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black">according to the pictures the square pipe is asymmetrical vs beam line</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black">and is most likely causing the "shade" on ComCal face.</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black">Wondering if FCAL is placed symmetrically vs beam,</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black">that should mean that pipe doesn't exactly match FCAL hole.</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black">The exact values from drawings would help and needed for MC</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black">geometry db to get an exact acceptance.</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black">If it is the case, that only mean we have to reduce ComCal</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black">fiducial region for Compton events.</span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black"> </span></p>
<p><span style="font-family:"Calibri",sans-serif; color:black"> Thanks for pictures.</span></p>
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<p><span style="font-family:"Calibri",sans-serif; color:black">Ilya</span></p>
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<p class="x_MsoNormal"><b><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">От:</span></b><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black"> GlueX-Collaboration <</span><a href="mailto:gluex-collaboration-bounces@jlab.org"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">gluex-collaboration-bounces@jlab.org</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">>
от имени Shepherd, Matthew <</span><a href="mailto:mashephe@indiana.edu"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">mashephe@indiana.edu</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">><br>
<b>Отправлено:</b> 28 февраля 2019 г. 12:49<br>
<b>Кому:</b> Ashot Gasparian<br>
<b>Копия:</b> </span><a href="mailto:primexd@jlab.org"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">primexd@jlab.org</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">;
</span><a href="mailto:andrsmit@jlab.org"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">andrsmit@jlab.org</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black">; GlueX Collaboration; Mark Stevens<br>
<b>Тема:</b> Re: [GlueX] Target installation plan</span><span style="font-family:"Calibri",sans-serif; color:black">
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Hi Ashot,<br>
<br>
> On Feb 28, 2019, at 11:58 AM, </span><a href="mailto:gasparan@jlab.org"><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">gasparan@jlab.org</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black"> wrote:<br>
<br>
> Therefore, it would be extremely important to take pictures of the FCAL<br>
> insertion part and post on some place to see, before our meeting this<br>
> evening.<br>
<br>
<br>
I've posted pictures of the FCAL insert here:<br>
<br>
</span><a href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flogbooks.jlab.org%2Fentry%2F3661206&data=02%7C01%7Cprimexd%40jlab.org%7C0aa0c7f5e13f42ab297408d69df4beb5%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636870071849608831&sdata=quO29QLF14Cu6UJSYkwEl0xndbv1zCGgbRR1FnOlEVU%3D&reserved=0" originalSrc="https://logbooks.jlab.org/entry/3661206" shash="I+gBSb9SsX9OBgQl6x4dBQVBvJnOl/whXmfb+GUNpHMVrHR+UXCURwq/lindcumEBqwMAZzaFKWHU3tsNxAnMGK2JF4mFb4royZZq1D18hoa1AxU44pzeTMTqIDiuY01TUzoAGkmB2gkg5N/QHXP+ksKJhLEXI0MEFb+Lzq7jv0=" originalsrc="https://logbooks.jlab.org/entry/3661206" shash="DlodJVEno0W6l44gXLNPa8p7bZVaU29jgdXKMVX8nF2kdisAQ+0HNqlrgcuj/kGEqOMeo3ysVCGvgrfyMGPaZkVmkQs7F8MifE9CKeoxu31Gh3n/qo/9FNdY4mibcRB9gtjBoBZYHRfBQyTIbKBM3Yul1w03J2HXBeO2Y/KSqNQ=" originalsrc="https://logbooks.jlab.org/entry/3661206" shash="OYDwv/Os/6+LqwBlAf957vqCgKsUsyrOss1ztmPjMVml6U8T4bsZg+BEEmye4qLnSFyBsBIxxakxokFKKnRutJgnAvaP7k5Bv7O3uZS36XDdGbgPZ9In8uDLS9w3OyaoQnogxFowshDsQGKwBXWjgIoHgBDaGRshuV3A+zA0F1I="><span style="font-size:11.0pt; font-family:"Calibri",sans-serif">https://logbooks.jlab.org/entry/3661206</span></a><span style="font-size:11.0pt; font-family:"Calibri",sans-serif; color:black"><br>
<br>
It looked today exactly as it did 5+ years ago when these were taken. (I'm surprised you haven't taken a peek at it before as it defines the acceptance of your detector.)<br>
<br>
The Plexiglas monitoring system is held in the groove on the upstream end. Anything of any density should be clear of the inner opening in the tube. From the darkroom all that is visible is what appears to be a thin tedlar cover on the upstream end. It is
needed for a light seal or else there is light path from the hall into the darkroom via the beam pipe.<br>
<br>
Matt<br>
<br>
---------------------------------------------------------------------<br>
Matthew Shepherd, Professor<br>
Department of Physics, Indiana University, Swain West 265<br>
727 East Third Street, Bloomington, IN 47405<br>
<br>
Office Phone: +1 812 856 5808</span></p>
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