[Dsg-rich] [EXTERNAL] RICH hardware

[Tyler Lemon]

Hi Valery,

The cRIOs will stay online as long as there is power and will be able to communicate over the network as long as there is network. Since RICH will be completely powered off, the cRIO will just be for monitoring the temperatures and humidity inside the detector.

The N2 flow to the RICH will continue; there are no remote controls, so even if power/network are lost, RICH should still get N2.

The three dry boxes with aerogel in the EEL building will stay on as long as there is power. The dry boxes are also connected to a UPS that can keep them powered for ~1 hour if power is lost.

Best regards,
Tyler
________________________________
From: Valery Kubarovsky <vpk at jlab.org>
Sent: Monday, March 23, 2020 12:25 PM
To: Marco Contalbrigo <mcontalb at fe.infn.it>; Mirazita Marco <marco.mirazita at lnf.infn.it>; Tyler Lemon <tlemon at jlab.org>
Cc: Valery Kubarovsky <vpk at jlab.org>
Subject: Re: [EXTERNAL] RICH hardware

Hi All,
The RICH detector will be shut down tomorrow morning.
N2 will stay ON. I will write to Bob about cRio boxes to keep them ON.
Epics will be operating.

Tyler, could you please tell us about cRios that we need them to be online all the time and about cabinets with aerogel? We need the cabinets be on all the time.

Thanks,
Valery

________________________________
From: Marco Contalbrigo <mcontalb at fe.infn.it>
Sent: Monday, March 23, 2020 12:12
To: Valery Kubarovsky <vpk at jlab.org>; Mirazita Marco <marco.mirazita at lnf.infn.it>
Subject: [EXTERNAL] RICH hardware

Hi,
as JLab is being locked down, we should check RICH is put in
safe conditions. At a ariance with the past, no RICH expert
will get access to the Hall.

I think we can switch off everything, excpet the N2 flow and
the cRios for nonitoring. If I am not mistaken we have 2
cRios: do we need both on ?

We should check with Tyler if he will have remote access to
the cRios for debugging possible issues with the cRio
themself.

Do I miss anything ?

Thanks, Marco.
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