[dsg-hallb_rich] [New Logentry] RICH air flow/pressure issues

[Tyler Lemon]

Hi,

I was able to get the RICH S1 system back up and running with the exception of the gas system items, they are all still reading as zero since the cRIO instrumentation reading that is not responding correctly.

I am 100% confident RICH S1 is still getting airflow and nitrogen purge since RICH S4 is still getting airflow and N2 flow and the local read out on the gas panels for S1 shows it is getting the expected flow.

If we need to get back up and running sooner rather than later, we could temporarily disable RICH S1 airflow and air pressure interlocks since the temperatures are stable and S4 is getting flow. If we'd want at least some sort of readout for the S1 airflows, we could put a webcam in front of the gas panel to see the local read out.

There's a few things I can try if the hall will stay in controlled access longer, but I need to go get some things from the EEL.

My plan is to go collect the things that might fix the present issue of the readout instrumentation not responding and then return to the hall and keep working for as long as we'll be in controlled access.

-Tyler
________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Thursday, October 13, 2022 8:15 AM
To: Nathan Baltzell <baltzell at jlab.org>; Brian Eng <beng at jlab.org>; Valery Kubarovsky <vpk at jlab.org>
Subject: Re: [New Logentry] RICH air flow/pressure issues

So it looks like the S1 controller is now having an issue coming back online...

>From logbook entries, it looks like beam is not going to the hall still from magnet issues and the hall is in controlled access.

I will go in to investigate in person. I should get there around 9:00.

-Tyler
________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Thursday, October 13, 2022 8:01 AM
To: Nathan Baltzell <baltzell at jlab.org>; Brian Eng <beng at jlab.org>; Valery Kubarovsky <vpk at jlab.org>
Subject: Re: [New Logentry] RICH air flow/pressure issues

Hi Nathan,

I can see that there's still airflow to RICH S4 and that the temperatures in RICH S1 are stable, so the detector is still getting air flow.

It looks like there's a time out error in the cRIO that reads those value.

Since I can see that the interlock is still tripped for S1  HV and LV, I'm going to go ahead and remotely reboot the system to see if it comes back.

-Tyler
________________________________
From: baltzell at jlab.org <baltzell at jlab.org>
Sent: Thursday, October 13, 2022 7:25 AM
To: Brian Eng <beng at jlab.org>; Tyler Lemon <tlemon at jlab.org>; Valery Kubarovsky <vpk at jlab.org>
Subject: [New Logentry] RICH air flow/pressure issues

RICH air flow/pressure issues<https://logbooks.jlab.org/entry/4057163>

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Lognumber 4057163<https://logbooks.jlab.org/entry/4057163>. Submitted by baltzell<https://logbooks.jlab.org/user/baltzell> on Thu, 10/13/2022 - 07:22<https://logbooks.jlab.org/entries?start_date=1665656573&end_date=1665663773&book=HBLOG&book=RICH>.

Logbooks:       HBLOG<https://logbooks.jlab.org/book/hblog> RICH<https://logbooks.jlab.org/book/rich>

RICH2 air pressure/flow dropped to zero. Contacting experts.

[https://logbooks.jlab.org/files/styles/plentybig/public/2022/10/4057163/Screen%20Shot%202022-10-13%20at%207.18.23%20AM.png]
[https://logbooks.jlab.org/files/styles/plentybig/public/2022/10/4057163/Screen%20Shot%202022-10-13%20at%207.21.20%20AM.png]
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