[Sbs_gems] [EXTERNAL] Re: Re: Argon/Carbon Dioxide gas cylinders to move to to gas shed 90A

[Holly Szumila-Vance]

Yes there’s several in the test lab rack. Maybe like 4 or 6 (can’t remember off the top of my head).

However, we need to see what is over at the Hall-there should be more premix over there.

From: Brad Sawatzky <brad at swatter.net>
Reply-To: "brad at swatter.net" <brad at swatter.net>
Date: Monday, December 6, 2021 at 2:34 PM
To: John Boyd <jab7bp at virginia.edu>, Brad Sawatzky <brads at jlab.org>
Cc: Holly Szumila-Vance <hszumila at jlab.org>, Mark Jones <jones at jlab.org>, Jack Segal <segal at jlab.org>, "sbs_gems at jlab.org" <sbs_gems at jlab.org>
Subject: [EXTERNAL] Re: [Sbs_gems] Re: Argon/Carbon Dioxide gas cylinders to move to to gas shed 90A

I don't think there are any additional premix near the Hall A gas shed, other than the partials...

Holly, are there more in a test lab rack?
On December 6, 2021 11:23:38 AM EST, John Boyd <jab7bp at virginia.edu> wrote:
I went to grab some gas from 90A and I realized that of the 6 cylinders we moved into 90A on Friday, only 2 of them were pre-mix. The other 4 were pure Argon. I'm hoping that there are still 4 pre-mix cylinders over at Hall A and that these 4 argon bottles were brought just accidentally in place of them.

Please let me know how to confirm this and proceed.

Best,

John

On Thu, Dec 2, 2021 at 6:24 PM Brad Sawatzky <brads at jlab.org<mailto:brads at jlab.org>> wrote:
I moved six 75:25 premix cylinders to the EEL gas racks this afternoon.
There are another 2--3 premix cylinders in EEL/125.  That is perhaps
~2 weeks worth of gas for the SBS GEMs -- probably enough to cover
December.

I don't think there are any more (useful) premix bottles in the Hall A
racks.  Those that are left are partials -- I checked a few of them and
they only have 400--500psi in them.  Hardly worth the effort to move
them given the GEM gas consumption rate.

* Holly or Jack:  I will leave it you two to coordinate and purchase
    more premix if needed.  I think we all got the recent email from
    Purchasing that the (official) lead-time is now 21 days for most
    premix.  If we want premix gas for January, we should probably
    order ASAP.  (Unless there are orders that just haven't shown up
    yet?)

The current plan is to switch to nitrogen over the holiday break.
That may require one person to come on-site at the end of Dec to swap a
bottle.  John will contact Mark, et to ensure at least he and one other
GEM expert are on the 'Holiday access list' so they can take care of
this.

-- Brad

--
Brad Sawatzky (he/him), PhD <brads at jlab.org<mailto:brads at jlab.org>> -<>- Jefferson Lab/ Hall C/C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org<mailto:brads-page at jlab.org>
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov
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