[Dsg-mvt] premix

[Marc McMullen]

Maxime, 

As soon as you know how much premix is needed let me know. 

As far as the operation of the MFC, all are currently operational. They have been fine as long as we keep them within the manufactures operating range (10C to 50C), and the C4H10 is not allowed to condense. 

Hall B should be contacted about the stability of temperature of the enclosure and C4H10 gas piping during the extremes (hot and cold weather). They can provide you the status of the set up on the Target gas pad. 

Marc McMullen 
Physics Division 
Detector Support Group 
7738 


From: "mdefurne" <mdefurne at jlab.org> 
To: dsg-mvt at jlab.org, "Todd Ewing" <jtewing at jlab.org>, "Yuri Gotra" <gotra at jlab.org> 
Sent: Wednesday, June 13, 2018 9:01:11 AM 
Subject: Re: [Dsg-mvt] premix 

Dear Marc, Dear Todd, 

Being in Paris, it will be hard for me to give you an exact number for 
the remaining bottles at Jefferson Lab. Todd, can you check how many 
premix bottles we have please? 

For 8 weeks, we need to have 28 bottles (~2 days/bottle). I think there 
might be 4 bottles left. Which means we have to order 24 premix bottles 
to be sure we are ready in case of any failure from the mixing system. 

What is the status concerning the MFCs? Are the ones with condensed 
isobutane in winter fixed? 

No expected issue with mixing system when we come back end of july? 
(because of summer heat) 

Kind regards, 

Maxime 

PS: Let me know if the order is not validated in time to have the 
bottles for August 23rd. 


On 12/06/2018 23:28, Marc McMullen wrote: 
> Hi Maxime, 
> 
> Please make sure that you are aware of the amount of Ar/C4H10 premix 
> bottles you currently have by the gas shed. Although the run is a 
> little bit in the future, ordering the gas now would probably a good 
> idea. Delivery takes about 6 to 8 weeks. I am sure you have an account 
> of your usage of premix to help estimate how much should be ordered. 
> 
> Thanks, 
> 

_______________________________________________ 
Dsg-mvt mailing list 
Dsg-mvt at jlab.org 
https://mailman.jlab.org/mailman/listinfo/dsg-mvt 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_mvt/attachments/20180613/358f6b84/attachment-0002.html>