[Dsg-rich] [EXTERNAL] RICH electronics

[Tyler Lemon]

Hi Marco,

The PT replacement has not been completed. It is scheduled for next Wednesday September 25.

As for the visit to optimize RICH running conditions, I will not be at work for at least part of the week of October 21 to October 25, however there should be other people from DSG that would be able to help.

What tests are being planned for the visit? Would it essentially be varying the settings of the cooling system (flow rate, buffer tank pressure, compressor output pressure) and seeing how the temperature within RICH is affected?


Best regards,
Tyler

________________________________
From: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
Sent: Friday, September 20, 2019 12:21 PM
To: Tyler Lemon <tlemon at jlab.org>
Cc: dsg-rich <dsg-rich at jlab.org>; Valery Kubarovsky <vpk at jlab.org>; marco contalbrigo <mcontalb at fe.infn.it>
Subject: Re: [EXTERNAL] RICH electronics

Hi Tyler,
do you know if Bob has completed the replacement of the FT?
If so, the compressor could be restarted on Monday morning, once we are
sure everything is working properly I can turn on the RICH electronics
and keep it on for the night and then make the tests on Tuesday morning.

As you know, we didn't have much time to optimize the working point of
the cooling system after the RICH installation, we simply choose running
conditions that ensure a safe operation of the detector.
But these running conditions might be problematic with two RICH modules
and definitely not sustainable in case of failure of one of the two
compressors.
Therefore, also in preparation of the upcoming CLAS12 data taking, I'm
planning a visit to JLab for Dario and Sandro to try to optimize the
running conditions, and to be effective this work must be coordinated
with you and the DSG.
The proposed dates are from October 21 to October 31. Is this plan ok
for you?
Thank you,
Marco




Il 2019-09-18 14:12 Tyler Lemon ha scritto:
> Hi Marco,
>
>  Bob Miller has scheduled the replacement of the faulty pressure
> transducer (PT) on the air-cooling buffer tank for next Wednesday,
> September 25.
>
>  Could the tests be scheduled to start Thursday September 26?
>
>  Best regards,
>  Tyler
>
> -------------------------
>
> FROM: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
>  SENT: Wednesday, September 18, 2019 4:08 AM
>  TO: Tyler Lemon <tlemon at jlab.org>
>  CC: dsg-rich <dsg-rich at jlab.org>; Valery Kubarovsky <vpk at jlab.org>;
> marco contalbrigo <mcontalb at fe.infn.it>
>  SUBJECT: [EXTERNAL] RICH electronics
>
> Hi Tyler,
>  the RICH electronics is off since quite a lot of time and in
> preparation
>  of the upcoming CLAS12 running I would like to turn it on to verify
> that
>  everything is still working and eventually to take new scaler
>  calibration data.
>  I could plan this work for the beginning of the next week.
>  In preparation for that, we should coordinate to have all the systems
>
>  ready. Would you be available to start the compressor for the test?
>  Thank you,
>  Marco
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