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Thanks for the update Youri.
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<div class="">DSG will make sure that monitoring is working as expected once the HTCC has been moved again.<br class="">
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">From:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Youri Sharabian <<a href="mailto:youris@jlab.org" class="">youris@jlab.org</a>><br class="">
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Subject:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=""><b class="">HTCC</b><br class="">
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Date:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">August 31, 2022 at 9:44:33 AM EDT<br class="">
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">To:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Bob Miller <<a href="mailto:rmiller@jlab.org" class="">rmiller@jlab.org</a>>, Denny Insley <<a href="mailto:dinsley@jlab.org" class="">dinsley@jlab.org</a>><br class="">
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<span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif; color:rgba(0, 0, 0, 1.0);" class=""><b class="">Cc:
</b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Brian Eng <<a href="mailto:beng@jlab.org" class="">beng@jlab.org</a>><br class="">
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Dear Bob and Denny,</div>
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The HTCC will be installed back in working position today (perhaps tomorrow, not sure). But in any case it will be done as you plan. I would like to ask you to keep HTCC disconnected from CO2 gas supply line for not more than 1 hour or so to keep humidity
in the volume not very high and then restore gas flow and required low humidity (about 50 ppm) in the HTCC. Monitoring of all parameters also have to be restored and checked by Brian Eng from DSG.</div>
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Once HTCC is back in place, aligned and fully controlled we will connect all signal and HV cables back. Than we will start checking gains of all 48 PMTs to equalize them and establish updated HV values. We will be using our external fast LED light source
and run tests on Hall B DAQ. Cables and etc.can be installed in 4-5 hours. Equalization of PMT gains requires 2-3 hours by our group. Final calibration of the detector will be done once electron beam is back on the target.<span class="Apple-converted-space"> </span><br class="">
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I'll be monitoring parameters of the HTCC remotely as usual. Please let me know (in advance if possible) when we possibly can start installing the cables.</div>
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Thank you very much.</div>
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Best regards,</div>
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Youri</div>
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I been in the Hall today in the morning: alignment group started with R1 DC.</span></div>
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