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<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif">Hi Ashot,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif">One more item is the GEM support structure ( 2 GEM planes vs 3 GEM planes). I believe it should be possible to hold procurement just for this item until a final decision is
made. Also, we may have to wait to finalize this part until all GEM parts have been procured.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif">Cheers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif">Dipangkar<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:14.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="color:black">From:
</span></b><span style="color:black">PRad <prad-bounces@jlab.org> on behalf of gasparan via PRad <prad@jlab.org><br>
<b>Date: </b>Wednesday, November 20, 2024 at 10:04</span><span style="font-family:"Arial",sans-serif;color:black"> </span><span style="color:black">AM<br>
<b>To: </b>PRad mail group <prad@jlab.org><br>
<b>Subject: </b>[PRad] Fwd: Re: Beamline Configuration Drawings for PRAD II, X17 and TFF<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><br>
Hi All,<br>
<br>
As you see Bob wants to fix the engineering drawings for the <br>
experiments. We are<br>
equally interested in finalizing this part to start the procurement and <br>
construction<br>
phase.<br>
<br>
There are few items still not finalized on this part, let us try to <br>
work on them before<br>
this Friday meeting, discuss them there and answer to Bob.<br>
<br>
1) veto scintillators thickness: we are testing them now but, it will <br>
take another week<br>
if not more. I will contact Youri to see if this is important for <br>
the engineering design<br>
part.<br>
2) Veto scintillator attachment tolerance: we are working on this item <br>
but, it will need<br>
again a week or so. I will contact with Youri and Dipangkar to see <br>
if a 0.5 mm tolerance<br>
is realistic (for both edges of a single scintilator). In all cases <br>
we need survey ponts<br>
on this device.<br>
Weizhi, please make this item a priority before the weekend. If we <br>
need one more meeting,<br>
I am ready for that.<br>
3) Changing the vacuum window from X17 to PRad_II experiments (as it <br>
was shown by Bob).<br>
This is highly undesirable since it will involve not only the vacuum <br>
part (that comes<br>
from the target change also) but, it will require a new survey of <br>
the HyCal.<br>
If we decide to run PRad-II with the new (smaller) window, then the <br>
Pb-glass part of the<br>
HyCal no longer in use (if even it is ready).<br>
Weizhi and Chao, please take one more look on this part to before <br>
the weekend.<br>
<br>
4) What else is there to be discussed???<br>
<br>
Thanks,<br>
Ashot<br>
<br>
<br>
-------- Original Message --------<br>
Subject: Re: [PRad] Beamline Configuration Drawings for PRAD II, X17 and <br>
TFF<br>
Date: 2024-11-20 08:17<br>
From: Bob Miller via PRad <prad@jlab.org><br>
To: Eugene Pasyuk <pasyuk@jlab.org>, "prad@jlab.org" <prad@jlab.org>, <br>
"pi0tff@jlab.org" <pi0tff@jlab.org><br>
Cc: Christopher Guthrie <guthrie@jlab.org><br>
Reply-To: Bob Miller <rmiller@jlab.org><br>
<br>
<br>
Good Morning All,<br>
<br>
Are there any comments on the layout of PRad II and X17, or do we<br>
assume the design is fixed and we can finalize the drawings and prepare<br>
to order parts?<br>
<br>
Thanks,<br>
<br>
Bob Miller<br>
Hall B Lead Engineer<br>
(757) 822-9586<br>
<br>
-------------------------<br>
<br>
From: Eugene Pasyuk <pasyuk@jlab.org><br>
Sent: Thursday, October 31, 2024 3:33 PM<br>
To: prad@jlab.org <prad@jlab.org>; pi0tff@jlab.org <pi0tff@jlab.org><br>
Cc: Bob Miller <rmiller@jlab.org>; Christopher Guthrie<br>
<guthrie@jlab.org><br>
Subject: Fw: Beamline Configuration Drawings for PRAD II, X17 and TFF<br>
<br>
Here are the beamline drawings for PRad/X17/TFF.<br>
Please review and give your feedback by November 15th.<br>
<br>
-Eugene<br>
<br>
-------------------------<br>
<br>
From: Christopher Guthrie <guthrie@jlab.org><br>
Sent: Thursday, October 31, 2024 14:47<br>
To: Eugene Pasyuk <pasyuk@jlab.org><br>
Cc: Bob Miller <rmiller@jlab.org><br>
Subject: Beamline Configuration Drawings for PRAD II, X17 and TFF<br>
<br>
Eugene,<br>
<br>
I have attached .pdf’s of the Preliminary versions<br>
PRAD II, X17 and TFF Beamline Configuration Drawings. Can you please<br>
send these out to the individual run groups and request comments by<br>
November 15th?<br>
<br>
Regards,<br>
<br>
Chris Guthrie<br>
<br>
Hall B Senior Mech. Designer<br>
<br>
(757) 269-6922<br>
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