[Dsg-ft] [Dsg-mvt] MVT gas usage in EEL

[Aune Stephan]

Hi Marco

Ok if not premix, but will mixing unit be ready by July in hall B, that is in ~15 days ?

I have made a small mistake in my previous email the line "(need of lines + ad hoc manometer)" was for the FTT if premixed was to be used in hall B

So if mixed tool for hall B can be ready the order of premixed gas go to 3
If not ready by then it's 6

Cheers
Stephan

De : Marco Battaglieri [mailto:battaglieri at ge.infn.it]
Envoyé : vendredi 16 juin 2017 17:14
À : Aune Stephan <stephan.aune at cea.fr>; George Jacobs <jacobsg at jlab.org>
Cc : Brian Eng <beng at jlab.org>; dsg-mvt at jlab.org; dsg-ft at jlab.org; DEFURNE Maxime <Maxime.Defurne at cea.fr>; CHRISTIAENS Guillaume <guillaume.christiaens at cea.fr>
Objet : Re: [Dsg-ft] [Dsg-mvt] MVT gas usage in EEL

Dear George, dear Stephan,
yesterday we had a meeting with Bob and Eugene to plan the FT installation in Hall-B.
We were told that, while in teh hall, we will ONLY use mixed gas (not premixed bottles).
This is not consistent with what you mentioned. If this is the case, we do not need any bottles since the plan is to move the FT to the Hall at the beginning of July with no further tests in the EEL.
Thanks in advance for clarifying  it
Cheers
Marco

Aune Stephan wrote:
Hi George

In order to have gas for this summer MVT and FTT and also in September when we will change one layer of MVT, I calculate the need to order 6 bottles.

This is assuming we run this summer:
forward only ~ 28 day (no need further)
barrel 42 day (to align with svt with cosmic) in hall B (need of lines + ad hoc manometer)
FTT (at reduce rate = 4 detector in serial) 56 day
Barrel with new layer 28 day

To this I add 2 spare bottle and I obtain, 15 bottles, I assume 9 are left.
Then the amount to order is 6.

Note that if some are remaining they will be used in Eel for the micromegas test bench, that we have to settle somewhere, to test spare micromegas before exchange if needed.

Thank you
Stephan


De : Dsg-mvt [mailto:dsg-mvt-bounces at jlab.org] De la part de George Jacobs
Envoyé : jeudi 15 juin 2017 17:29
À : Brian Eng <beng at jlab.org><mailto:beng at jlab.org>; dsg-mvt at jlab.org<mailto:dsg-mvt at jlab.org>; dsg-ft at jlab.org<mailto:dsg-ft at jlab.org>
Objet : Re: [Dsg-mvt] MVT gas usage in EEL

Please remember that 4 of those pre-mix cylinders in the EEL gas storage cage are reserved for the FT testing in Hall B later this summer. So, the available gas for EEL testing is 2 on the pad and 4 in the cage.

George
On 6/15/2017 10:17 AM, Brian Eng wrote:

Just so you guys have a count of what is available, there are a total of 10 full cylinders remaining as of this email.



2 on the EEL gas pad and 8 in the EEL gas shed.



On Jun 15, 2017, at 8:41 AM, George Jacobs <jacobsg at jlab.org><mailto:jacobsg at jlab.org> wrote:



The MVT gas usage is greater than was originally estimated. This brings up the question, do we need to buy more pre-mixed gas to complete testing? If we do need to order more pre-mix 10% C4H10 in argon, it should be done ASAP due to the long lead time of 4-6 weeks.



George






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