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Hi Marco,</div>
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The PT replacement has not been completed. It is scheduled for next Wednesday September 25.
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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.</div>
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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?</div>
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Best regards,</div>
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Tyler<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Marco Mirazita <Marco.Mirazita@lnf.infn.it><br>
<b>Sent:</b> Friday, September 20, 2019 12:21 PM<br>
<b>To:</b> Tyler Lemon <tlemon@jlab.org><br>
<b>Cc:</b> dsg-rich <dsg-rich@jlab.org>; Valery Kubarovsky <vpk@jlab.org>; marco contalbrigo <mcontalb@fe.infn.it><br>
<b>Subject:</b> Re: [EXTERNAL] RICH electronics</font>
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<div class="PlainText">Hi Tyler,<br>
do you know if Bob has completed the replacement of the FT?<br>
If so, the compressor could be restarted on Monday morning, once we are <br>
sure everything is working properly I can turn on the RICH electronics <br>
and keep it on for the night and then make the tests on Tuesday morning.<br>
<br>
As you know, we didn't have much time to optimize the working point of <br>
the cooling system after the RICH installation, we simply choose running <br>
conditions that ensure a safe operation of the detector.<br>
But these running conditions might be problematic with two RICH modules <br>
and definitely not sustainable in case of failure of one of the two <br>
compressors.<br>
Therefore, also in preparation of the upcoming CLAS12 data taking, I'm <br>
planning a visit to JLab for Dario and Sandro to try to optimize the <br>
running conditions, and to be effective this work must be coordinated <br>
with you and the DSG.<br>
The proposed dates are from October 21 to October 31. Is this plan ok <br>
for you?<br>
Thank you,<br>
Marco<br>
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Il 2019-09-18 14:12 Tyler Lemon ha scritto:<br>
> Hi Marco,<br>
> <br>
> Bob Miller has scheduled the replacement of the faulty pressure<br>
> transducer (PT) on the air-cooling buffer tank for next Wednesday,<br>
> September 25.<br>
> <br>
> Could the tests be scheduled to start Thursday September 26?<br>
> <br>
> Best regards,<br>
> Tyler<br>
> <br>
> -------------------------<br>
> <br>
> FROM: Marco Mirazita <Marco.Mirazita@lnf.infn.it><br>
> SENT: Wednesday, September 18, 2019 4:08 AM<br>
> TO: Tyler Lemon <tlemon@jlab.org><br>
> CC: dsg-rich <dsg-rich@jlab.org>; Valery Kubarovsky <vpk@jlab.org>;<br>
> marco contalbrigo <mcontalb@fe.infn.it><br>
> SUBJECT: [EXTERNAL] RICH electronics<br>
> <br>
> Hi Tyler,<br>
> the RICH electronics is off since quite a lot of time and in<br>
> preparation<br>
> of the upcoming CLAS12 running I would like to turn it on to verify<br>
> that<br>
> everything is still working and eventually to take new scaler<br>
> calibration data.<br>
> I could plan this work for the beginning of the next week.<br>
> In preparation for that, we should coordinate to have all the systems<br>
> <br>
> ready. Would you be available to start the compressor for the test?<br>
> Thank you,<br>
> Marco<br>
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