[Sbs_gems] Timeline for SBS GEMs

[Holly Szumila-Vance]

Hi Bogdan,

I’m sorry if my e-mail was confusing, but end of May timeframe is what I think we can make with one SBS layer having the HV divider upgrade as you suggest.

As I don’t see this affecting the DAQ from the other beam running timeline considerations, I think this is more reasonable that we can prepare the layers ahead of a Hall install. Alternatively, they will sit in the hall for a month if we moved them in the end of April, staged and untouched until we can install first week of June. I would prefer to keep them running in EEL up until the install.

I presented no delays here other than the one month that they would be in EEL rather than the Hall. We are also running with a Hall DAQ configuration in EEL so it should be easier to implement than the transition that previously happened from TEDF.

Thanks,
Holly

From: Mark Jones <jones at jlab.org>
Date: Thursday, March 3, 2022 at 2:32 PM
To: Bogdan Wojtsekhowski <bogdanw at jlab.org>, Holly Szumila-Vance <hszumila at jlab.org>, "Sbs_gems at jlab.org" <Sbs_gems at jlab.org>
Cc: "Cates, Gordon D (gdc4k)" <gdc4k at virginia.edu>, "Averett, Todd D" <tdaver at wm.edu>
Subject: Re: Timeline for SBS GEMs

Bogdan,
          We need to be realistic. I know that you want to run pion A_LL.
The estimated schedule has been vetted by Gordon and other target experts
and the end of installation by the end of August in realistic. I do not see starting experiment
in July as remotely possible.
         We should have a separate meeting to determine what SBS GEMs are a priority to install.

Cheers,
            Mark
________________________________
From: Sbs_gems <sbs_gems-bounces at jlab.org> on behalf of Bogdan Wojtsekhowski <bogdanw at jlab.org>
Sent: Thursday, March 3, 2022 2:22 PM
To: Holly Szumila-Vance <hszumila at jlab.org>; Sbs_gems at jlab.org <Sbs_gems at jlab.org>
Cc: Cates, Gordon D (gdc4k) <gdc4k at virginia.edu>; Averett, Todd D <tdaver at wm.edu>
Subject: Re: [Sbs_gems] Timeline for SBS GEMs

Hi Holly,

I would like to bring your attention that with He-3 target the rates will be low and
needs for improved (final) HV system is not critical. It would be nice to have one-two
divider to be installed for test.
At the same time to make the DAQ installation and commissioning must to be considered.
From GEn point of view I advocate to move GEM installation as early as possible
because to start experiment in July is very important.
Thanks,

Bogdan
________________________________
From: Sbs_gems <sbs_gems-bounces at jlab.org> on behalf of Holly Szumila-Vance <hszumila at jlab.org>
Sent: Thursday, March 3, 2022 1:59 PM
To: Sbs_gems at jlab.org <Sbs_gems at jlab.org>
Subject: [Sbs_gems] Timeline for SBS GEMs

Hi all,

So it looks like first week of June is still the best time for the crane in Hall A to put the SBS side GEMs in place. We basically have up until then to prepare the layers, and if we are only modifying 1 HV divider then it seems doable to me.

We would want the INFN layers modified by then if possible.

Let me know if you think differently.

-Holly
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