[Bonuslist] Fw: Fw: BONuS Gas port map

[Carlos Ayerbe Gayoso]

Dear Bonusites,

yesterday I met Bob Miller, he asked me a couple of questions (and more in the email below) about some safety features of the RTPC and some concerns about the DMS. I appreciate to check or complete the answers I plan to send to Bob. My comments in red, answers from me in blue.

Thank you

-Carlos

P.S. let me know if you have problems to visualize the email, I am using the Office365 features

________________________________
From: Bob Miller <rmiller at jlab.org>
Sent: Monday, July 15, 2019 4:07 PM
To: Carlos Ayerbe Gayoso
Subject: Re: Fw: BONuS Gas port map


Hi Carlos,


I have a few more questions on the Bonus 12 target and detector gas systems:


-DMS (this is mainly to Nathan)

  1.  where are the gas connections?
  2.   is there a mounting feature on the detector, or will it sit on a shelf?

(Bob's idea is having the DMS attached to the gas panel. I didn't said anything against, but I don't not if this possible or desirable)
    3. is there any radiation shielding required?
    4. what is the maximum internal pressure allowed?  The system currently has a 1 psi check valve to act as a relief valve; is the 1 psi acceptable?


-RTPC

  1.  what is the expected operating pressure in the buffer and RTPC volumes

The pressure in the Drift region should be 1atm+epsilon, thus the buffer volumen should be (1atm+epsilon)+epsilon' (lightly higher than the drift region)

    2. what is the maximum pressure in these volumes?  An over pressure device will be added to protect the detector

I don't know if we have these estimations. Nevertheless, Bob is adding extra protection to avoid overpressure, e.g. bubblers.

Regards,

Bob



--

Bob Miller
Hall B Lead Engineer
Jefferson Lab
757 822-9586


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