[Dsg-rich] [EXTERNAL] RICH electronics

[Marco Mirazita]

Hi Tyler,
sorry, I had in mind that the replacement of the PT was scheduled for 
last Wednesday.

The tests we have in mind to optimize the cooling system is basically 
what you said. But we still have to make a plan of the specific 
measurements we need. We will do this plan in the next weeks.
Any suggestion from you and the DSG is welcome.

Best regards,
Marco


Il 2019-09-20 20:46 Tyler Lemon ha scritto:
> 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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