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<p>Hello Bob,</p>
<p><br>
</p>
<p>Thank you for providing the new procedures. They look very good.
A couple a comments on the target installation and replacement
procedure:</p>
<p>- Target initial installation should have a last step to remove
the tooling support plate installed in step 2.</p>
<p>- For the target replacement, I think we should add a mention to
the failed target procedure in the other document in the case of a
failed target. <br>
</p>
<p><br>
</p>
<p>Following up on the pressure discussion, another couple of
remarks.</p>
<p>- I think the repeatability test can indeed be done at a lower
pressure (15psi is fine with me). The measurement that will be
most important is the final one with cabling in place, which
should be at 68psi.<br>
</p>
<p>- It would be useful to add a measurement without pressure as
well at the end. This is because we will setup the beam position
without the target pressurized in the beginning of the experiment.
So if the target moves by more than 100µm sideways when
pressurized that will be important to know for our commissioning.</p>
<p><br>
</p>
<p>Thanks</p>
<p>Raphael<br>
</p>
<p><br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">Le 17/10/2024 à 13:32, Bob Miller a
écrit :<br>
</div>
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Hi Whit,</div>
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See answers below in bold:</div>
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Bob Miller</div>
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Hall B Lead Engineer</div>
<div
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(757) 822-9586</div>
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<div id="divRplyFwdMsg" dir="ltr"><span
style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Armstrong,
Whitney R. <a class="moz-txt-link-rfc2396E" href="mailto:warmstrong@anl.gov"><warmstrong@anl.gov></a><br>
<b>Sent:</b> Wednesday, October 16, 2024 5:15 PM<br>
<b>To:</b> alert collaboration
<a class="moz-txt-link-rfc2396E" href="mailto:alert_collaboration@jlab.org"><alert_collaboration@jlab.org></a>; Raphael Dupre
<a class="moz-txt-link-rfc2396E" href="mailto:raphael.dupre@ijclab.in2p3.fr"><raphael.dupre@ijclab.in2p3.fr></a>; Bob Miller
<a class="moz-txt-link-rfc2396E" href="mailto:rmiller@jlab.org"><rmiller@jlab.org></a><br>
<b>Subject:</b> Re: [Alert_collaboration] [EXTERNAL] News
& ALERT Meeting</span>
<div> </div>
</div>
<div style="font-size: 11pt;">Hi Bob,<br>
<br>
Thanks for the update.<br>
I have a few comments and questions regarding the Survey and
Alignment Procedure:<br>
<br>
- Is the "Target Location Repeatability" test performed after
the full "Target Initial Installation" with leak check
procedure? Previously we had done some survey steps before the
leak check.<br>
<span style="color: rgb(0, 0, 0);"><b>Yes, this is done after
the leak checks are complete.</b></span></div>
<div style="font-size: 11pt;"><span style="color: rgb(0, 0, 0);"><b><br>
</b></span>- For the "Leak Test after Installation into ALERT
Detector", could we add on a measurement of the depressurization
after a few hours? This might be useful to know later. <br>
<b>Yes, we can increase the leak down test to 3 hours after step
12.</b></div>
<div style="font-size: 11pt;"><br>
- Is it possible to add to the Target Location Repeatability
Test an initial measurement of the downstream window OD without
the Target Support Block Halves in place yet?</div>
<div style="font-size: 11pt; color: rgb(0, 0, 0);"><b>No, the
target droops too much without the support halves.</b></div>
<div style="font-size: 11pt;"><br>
With and without pressure? I am curious how much movent occurs
due to the Target Support Block Halves.<br>
<br>
- I am concerned about the Target Location Repeatability tests
being done without something protecting the HDC. Is there a
difference between 15 psi and 68 psi in terms of straw
deformation? Maybe adding a few more pressures between 0 and 68
psi to my previous suggestion would help answer that. That is,
if the straw is as rigid at 15 psi as it is at 68, perhaps the
repeatability tests only need to go 15 psi? (Note 15 psi is just
a randomly chosen low pressure).</div>
<div style="font-size: 11pt;"><b>The request to survey under
pressure came from the ALERT group. I will change the
pressure to whatever is suggested by the ALERT group.</b></div>
<div style="font-size: 11pt;"><b><br>
</b></div>
<div style="font-size: 11pt;"><b>Regards,</b></div>
<div style="font-size: 11pt;"><b>Bob<br>
</b><br>
Thanks,<br>
Whit<br>
<br>
________________________________________<br>
From: Alert_collaboration
<a class="moz-txt-link-rfc2396E" href="mailto:alert_collaboration-bounces@jlab.org"><alert_collaboration-bounces@jlab.org></a> on behalf of Bob
Miller via Alert_collaboration
<a class="moz-txt-link-rfc2396E" href="mailto:alert_collaboration@jlab.org"><alert_collaboration@jlab.org></a><br>
Sent: Wednesday, October 16, 2024 7:22 AM<br>
To: alert collaboration; Raphael Dupre<br>
Subject: Re: [Alert_collaboration] [EXTERNAL] News & ALERT
Meeting<br>
<br>
Hi Raphael, Please find the attached procedures for your review.
Thanks, Bob Miller Hall B Lead Engineer (757) 822-9586 From:
Alert_collaboration
<a class="moz-txt-link-rfc2396E" href="mailto:alert_collaboration-bounces@ jlab. org"><alert_collaboration-bounces@ jlab. org></a> on behalf of
Raphael Dupre via Alert_collaboration<br>
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This Message Is From an External Sender<br>
This message came from outside your organization.<br>
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Hi Raphael,<br>
<br>
Please find the attached procedures for your review.<br>
<br>
Thanks,<br>
<br>
<br>
Bob Miller<br>
Hall B Lead Engineer<br>
(757) 822-9586<br>
________________________________<br>
From: Alert_collaboration
<a class="moz-txt-link-rfc2396E" href="mailto:alert_collaboration-bounces@jlab.org"><alert_collaboration-bounces@jlab.org></a> on behalf of
Raphael Dupre via Alert_collaboration
<a class="moz-txt-link-rfc2396E" href="mailto:alert_collaboration@jlab.org"><alert_collaboration@jlab.org></a><br>
Sent: Wednesday, October 16, 2024 7:19 AM<br>
To: alert collaboration <a class="moz-txt-link-rfc2396E" href="mailto:alert_collaboration@jlab.org"><alert_collaboration@jlab.org></a><br>
Subject: [Alert_collaboration] [EXTERNAL] News & ALERT
Meeting<br>
<br>
Hello everyone,<br>
<br>
I wanted to let you know that the team in JLab has repaired the
broken<br>
wire and cleaned up the chamber. All HV sectors were tested and
all of<br>
them reached 1800V with very low current. They will be
reinstalling<br>
everything in the coming days.<br>
<br>
To discuss this and more, we will meet tomorrow at the usual
time 9 am<br>
(ANL) / 10 am (JLab) / 4 pm (IJCLab).<br>
<br>
Connection link:<br>
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Wiki page:<br>
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Cheers,<br>
Raphael<br>
<br>
--<br>
Raphaël Dupré<br>
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie<br>
CNRS - IN2P3<br>
Université Paris-Saclay<br>
<br>
<br>
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<pre class="moz-signature" cols="72">--
Raphaël Dupré
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
CNRS - IN2P3
Université Paris-Saclay</pre>
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