[Halld-pid-upgrade] timing spectra with the broken bar

[Maria Patsyuk]

Hi all,

please have a look at my study about whether a timing spectrum would give an idea about damage of the radiators:

https://gluexdirc.mit.edu/light-test

Conclusions is short:


  *   light spectra agrees with John's results<https://halldweb.jlab.org/wiki/index.php/File:PreliminaryBarTiming.pdf>
  *   the effect is small: a completely broken joint is assumed, it gives an extra signal of about ~ 9 -18 %
  *   the effect is larger, when  the light enters at an angle with respect to the radiator axis (maximal angle is about 30 degrees)
  *   light source and photosensor should be fast enough to deal with light pulses ~ 10 ns (difference between neighbouring signals)
  *   I'm not sure about the noise level, so I did not account for it.

Looking forward to your feedback.

Best regards,
Maria


On Dec 15, 2016, at 12:44 PM, Justin Stevens <jrsteven at jlab.org<mailto:jrsteven at jlab.org>> wrote:

Hi All,

We'll have a DIRC meeting tomorrow at 11 am.  You can find the agenda at https://halldweb.jlab.org/wiki/index.php/December_16,_2016_PID_Upgrade.

-Justin
_______________________________________________
Halld-pid-upgrade mailing list
Halld-pid-upgrade at jlab.org<mailto:Halld-pid-upgrade at jlab.org>
https://mailman.jlab.org/mailman/listinfo/halld-pid-upgrade

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/halld-pid-upgrade/attachments/20161228/9548742a/attachment.html>