[Alert_collaboration] [EXTERNAL] News & ALERT Meeting

[Bob Miller]

Hi Whit,

See answers below in bold:


Bob Miller
Hall B Lead Engineer
(757) 822-9586

________________________________
From: Armstrong, Whitney R. <warmstrong at anl.gov>
Sent: Wednesday, October 16, 2024 5:15 PM
To: alert collaboration <alert_collaboration at jlab.org>; Raphael Dupre <raphael.dupre at ijclab.in2p3.fr>; Bob Miller <rmiller at jlab.org>
Subject: Re: [Alert_collaboration] [EXTERNAL] News & ALERT Meeting

Hi Bob,

Thanks for the update.
I have a few comments and questions regarding the Survey and Alignment Procedure:

- 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.
Yes, this is done after the leak checks are complete.

- 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.
Yes, we can increase the leak down test to 3 hours after step 12.

- 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?
No, the target droops too much without the support halves.

With and without pressure? I am curious how much movent occurs due to the Target Support Block Halves.

- 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).
The request to survey under pressure came from the ALERT group.  I will change the pressure to whatever is suggested by the ALERT group.

Regards,
Bob

Thanks,
Whit

________________________________________
From: Alert_collaboration <alert_collaboration-bounces at jlab.org> on behalf of Bob Miller via Alert_collaboration <alert_collaboration at jlab.org>
Sent: Wednesday, October 16, 2024 7:22 AM
To: alert collaboration; Raphael Dupre
Subject: Re: [Alert_collaboration] [EXTERNAL] News & ALERT Meeting

Hi Raphael, Please find the attached procedures for your review. Thanks, Bob Miller Hall B Lead Engineer (757) 822-9586 From: Alert_collaboration <alert_collaboration-bounces@ jlab. org> on behalf of Raphael Dupre via Alert_collaboration
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Hi Raphael,

Please find the attached procedures for your review.

Thanks,


Bob Miller
Hall B Lead Engineer
(757) 822-9586
________________________________
From: Alert_collaboration <alert_collaboration-bounces at jlab.org> on behalf of Raphael Dupre via Alert_collaboration <alert_collaboration at jlab.org>
Sent: Wednesday, October 16, 2024 7:19 AM
To: alert collaboration <alert_collaboration at jlab.org>
Subject: [Alert_collaboration] [EXTERNAL] News & ALERT Meeting

Hello everyone,

I wanted to let you know that the team in JLab has repaired the broken
wire and cleaned up the chamber. All HV sectors were tested and all of
them reached 1800V with very low current. They will be reinstalling
everything in the coming days.

To discuss this and more, we will meet tomorrow at the usual time 9 am
(ANL) / 10 am (JLab) / 4 pm (IJCLab).

Connection link:
https://urldefense.proofpoint.com/v2/url?u=https-3A__ijclab.zoom.us_j_98179063617-3Fpwd-3DNjVTaisxY1d6eTVjM25LNFlMUW9QZz09&d=DwIDaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=xvIrZb1p8HoRayKD1Sz8zPzqi4-qHfiBCWqgj3oMbOQ&m=jqIOZ45OEhkRx1o3nS63AbGKh3NIgymKvMZBGjrimLmrbAXLCwATDS9PEeoYjZxI&s=OMObZtn50ENrelZw5FxUXIe8LeCqt0-F720qiTq8MVE&e=

Wiki page:
https://clasweb.jlab.org/wiki/index.php/ALERT_Meeting_2024<https://urldefense.proofpoint.com/v2/url?u=https-3A__urldefense.us_v3_-5F-5Fhttps-3A__clasweb.jlab.org_wiki_index.php_ALERT-5FMeeting-5F2024-5F-5F-3B-21-21G-5FuCfscf7eWS-21ZqDsRb5MbRXIdurnb6ju-2D6pTrtrM0CRW0pIrJfVHNH3llHfQqMUzMyCAo1VBgWCXAxq6iayyrCml-2DjWGPmZQ7k7xh0aC-24&d=DwIGaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=plE8x1Qj6-oBUv4DJULncvm2rlHV-MV7JFc6UEKBC1w&m=FXyBF1kqucQczs0aLe6nYgSFCEJaLFxfcoqzlmJde19-vOP8YkKUvIn51WklNISX&s=RZFBMFkc971pimPQHCa7W5olqcBfIxH96UKSpqNKfNg&e= >

Cheers,
Raphael

--
Raphaël Dupré
Laboratoire de Physique des 2 Infinis Irène Joliot-Curie
CNRS - IN2P3
Université Paris-Saclay


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