<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Zhiwen,<div class=""><br class=""></div><div class="">I would not recommend this solution especially for PVDIS. The reflectivity of the mirrors is quite small at 200nm. To take full advantage of the wavelength shifter coating it would be important to have the reflectivity optimized so that it is still high down to 180 nm.</div><div class="">The SANE experiment Cherenkov mirrors coated at CERN used in conjunction with quartz 3” tubes had on average 84% down to 180 nm and dropped to 80% at 160nm.</div><div class=""><br class=""></div><div class="">Z.-E.<br class=""><div><blockquote type="cite" class=""><div class="">On Aug 28, 2017, at 1:25 PM, Zhiwen Zhao <<a href="mailto:zwzhao@jlab.org" class="">zwzhao@jlab.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">Hi, All<br class=""><br class="">Here is an update Mauri gave for CLAS12 LTCC<br class=""><a href="http://clasweb.jlab.org/group_meeting_minutes/Physics/talks_2017/ltcc-8-28.pdf" class="">http://clasweb.jlab.org/group_meeting_minutes/Physics/talks_2017/ltcc-8-28.pdf</a><br class=""><br class="">Things are interesting to SoLID LGC and HGC<br class="">1. slide 4,5,6 shows nice reflection of thin film as mirror, which could be a cheap alternative to expensive CFRP mirror<br class="">2. slide 13, 03-1.1kg/day leak rate.<br class=""><br class="">Zhiwen<br class="">_______________________________________________<br class="">Solid_cc mailing list<br class="">Solid_cc@jlab.org<br class="">https://mailman.jlab.org/mailman/listinfo/solid_cc<br class=""></div></div></blockquote></div><br class=""><div class="">
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