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Hi all,
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<div class="">please have a look at my study about whether a timing spectrum would give an idea about damage of the radiators:</div>
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<div class=""><a href="https://gluexdirc.mit.edu/light-test" class="">https://gluexdirc.mit.edu/light-test</a></div>
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<div class="">Conclusions is short:</div>
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<li class=""><strong class="">light spectra agrees with <a href="https://halldweb.jlab.org/wiki/index.php/File:PreliminaryBarTiming.pdf" style="color: rgb(0, 113, 179); text-decoration: none;" class="">John's results</a></strong></li><li class=""><strong class="">the effect is small: a completely broken joint is assumed, it gives an extra signal of about ~ 9 -18 % </strong></li><li class=""><strong class="">the effect is larger, when the light enters at an angle with respect to the radiator axis (maximal angle is about 30 degrees)</strong></li><li class=""><strong class="">light source and photosensor should be fast enough to deal with light pulses ~ 10 ns (difference between neighbouring signals)</strong></li><li class=""><strong class="">I'm not sure about the noise level, so I did not account for it.</strong></li></ul>
<div class="">Looking forward to your feedback.</div>
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<div class="">Best regards,</div>
<div class="">Maria</div>
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<div class="">On Dec 15, 2016, at 12:44 PM, Justin Stevens <<a href="mailto:jrsteven@jlab.org" class="">jrsteven@jlab.org</a>> wrote:</div>
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<div class="">Hi All,<br class="">
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We'll have a DIRC meeting tomorrow at 11 am. You can find the agenda at <a href="https://halldweb.jlab.org/wiki/index.php/December_16,_2016_PID_Upgrade" class="">
https://halldweb.jlab.org/wiki/index.php/December_16,_2016_PID_Upgrade</a>.<br class="">
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-Justin<br class="">
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Halld-pid-upgrade mailing list<br class="">
<a href="mailto:Halld-pid-upgrade@jlab.org" class="">Halld-pid-upgrade@jlab.org</a><br class="">
https://mailman.jlab.org/mailman/listinfo/halld-pid-upgrade<br class="">
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