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That looks like it could be difficult to simulate. Curtis<br class="">
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<div class="">On Apr 24, 2020, at 11:46, Alexander Austregesilo <<a href="mailto:aaustreg@jlab.org" class="">aaustreg@jlab.org</a>> wrote:</div>
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<div class="">Hi,<br class="">
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I looked at the accidental corrected rho yields as a function of energy for the three test runs. You can see the plots on this wiki page:<br class="">
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<a href="https://halldweb.jlab.org/wiki-private/index.php/2020_TagM_Threshold_Test" class="">https://halldweb.jlab.org/wiki-private/index.php/2020_TagM_Threshold_Test</a><br class="">
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Comparing the two versions with and without the requirement of ADC/TDC matching for the hodoscope, I only see a loss of events below 1% in almost the full energy range. There is only one 100MeV-wide bin near 9.1GeV, where the loss is about 15%. Could this be
a sign of a broken or miscalibrated TDC?<br class="">
<br class="">
For the 2 runs before the adjustment of the microscope thresholds, the loss of rho events with tagged beam photons is close to 30% as expected. Once the thresholds were fixed in run 71724, the loss goes down to 10% in the higher-energy part of the microscope,
while it completely recovers for the low-energy part. What is the reason for this discrepancy? New vs old fibers?<br class="">
<br class="">
Best regards,<br class="">
<br class="">
Alex<br class="">
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A. Meyer</span><span class="Apple-converted-space"> </span>|<span class="Apple-converted-space"> </span><span style="font-size: 1.2em; line-height: 1.2em;" class="">MCS Associate Dean for Research<span class="Apple-converted-space"> </span><br class="">
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