[Dsg-rich] [New Logentry] RICH high temperature interlock came off again.

Valery Kubarovsky vpk at jlab.org
Tue Aug 7 17:36:24 EDT 2018


Amrit, 

Thank you for advice. Yes, we have options to overcome this problem. 
For a moment we finished our tests and I will keep the detector OFF untill the 
conditions will be stable. 

Bets regards, 
Valery 

> From: "Amrit Yegneswaran" <yeg at jlab.org>
> To: "Valery Kubarovsky" <vpk at jlab.org>
> Cc: dsg-rich at jlab.org
> Sent: Tuesday, August 7, 2018 4:56:51 PM
> Subject: Re: [Dsg-rich] [New Logentry] RICH high temperature interlock came off
> again.

> valery,
> as marc's email yesterday suggested, keeping the roll up door open increases the
> temp in the hall.
> tyler looked into the matter today and noticed that the hall temp goes up by 5
> F.
> (tyler will send a detailed report after the dsg meeting tomorrow)
> so for now the options are:

>     1. ask that the roll up door be kept shut, as much as possible .
>     2. increase air flow by about 5%
>     3. increase threshold by another 3 C.

> in reality we have 3C3+3C2+3C1 +3C0 options!
> amrit

> From: vpk at jlab.org
> To: dsg-rich at jlab.org, vpk at jlab.org
> Sent: Tuesday, August 7, 2018 4:00:04 PM
> Subject: [Dsg-rich] [New Logentry] RICH high temperature interlock came off
> again.

> RICH high temperature interlock came off again.

> Lognumber 3584622 . Submitted by vpk on Tue, 08/07/2018 - 15:58. Logbooks: 	RICH

> Entry Makers: 	vpk

> We have the same situation today around noon: high temp interlock (N5 and 6)
> switched RICH off lv and hv.
> I increased (+2C) the high limits at these sensors. It is still acceptable for
> the front-end electronics.

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> M
> T













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