[dsg-hallb_rich] RICH S1 update: gas system and EPICS back, but no T or H due to internal power supply failure

[Tyler Lemon]

Hi Chris,

I just spoke to Marco Mirazita in the counting house about that.

Those interlocks have now been re-enabled, so if either air flow or the pressyre goes away, it will shut down the detector.

Thanks for your help yesterday!

-Tyler
________________________________
From: Christopher Dilks <dilks at jlab.org>
Sent: Friday, June 6, 2025 5:19 PM
To: Tyler Lemon <tlemon at jlab.org>; tlemon--- via dsg-hallb_rich <dsg-hallb_rich at jlab.org>; Valery Kubarovsky <vpk at jlab.org>; mirazita at jlab.org <mirazita at jlab.org>
Subject: Re: RICH S1 update: gas system and EPICS back, but no T or H due to internal power supply failure

Hi Tyler,

Thank you very much!

Tyler Lemon
6/6/2025 17:08
The RICH S1 EPICS, air flows, air pressure, and nitrogen flow are back working. They should be viewable in EPICS.
Should we re-enable the interlocks (Air Flow 1, Air Flow 2, Air Pressure 1)?

Cheers,
Chris


Christopher Dilks

Jefferson Lab Staff Scientist

Office: B122

Phone: 757-269-7750

Email: dilks at jlab.org

________________________________
From: Tyler Lemon <tlemon at jlab.org>
Sent: Friday, June 6, 2025 17:08
To: tlemon--- via dsg-hallb_rich <dsg-hallb_rich at jlab.org>; Valery Kubarovsky <vpk at jlab.org>; Christopher Dilks <dilks at jlab.org>; mirazita at jlab.org <mirazita at jlab.org>
Subject: RICH S1 update: gas system and EPICS back, but no T or H due to internal power supply failure

Hello everyone,

A bit of good news but then more bad. Sorry for the long email, the main points are in bold.

Bit of Good:
The RICH S1 EPICS, air flows, air pressure, and nitrogen flow are back working. They should be viewable in EPICS.

More Bad:
The sbRIO controller that reads the digital temperature and humidity sensors has an internal 3.3 V power supply failure.
This status can be seen in the LabVIEW expert screen or with the LabVIEW network shared variable "\\rich2sbrio\network-shared-variables\sbrio-3v3-okay".
The temperature and humidity sensors cannot be read with this failure, so all temperatures are -45 C and all humidity readings are 0%.
The solution is a swapping the hardware controller.

Things were working around 2pm, so I think the 3.3V power supply failure on the controller is more bad luck and an unfortunate coincidence.

It looks like next Wednesday June 11 is a maintenance day. I'll be ready then to swap the sbRIO.
If something happens and the hall is open Monday or Tuesday, I'll take that opportunity to swap things sooner.

Lastly, I can provide more details if needed.
Email is preferred, but my cell is 757-768-5316 just in case.
If I'm not able to answer the phone in time, please leave a message or text me and I'll call back.

I don't think there is much else I can do today, especially since the hall is closed for beam, so I will be headed home shortly since I've been here since 8AM.

-Tyler


PS:
If anyone else in DSG wants to give it a try, the latest version of the program is at the path below and uses LabVIEW 2020 (I've been using the PC dsgcontrols2 but the PC dsgcontrols1 also has it).
O:\DSG_Slow_Controls\RICH-Hardware-Interlock-System\2025-06-06_RICH_S1

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