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<font face="Helvetica, Arial, sans-serif">the are indeed wrong they
should be as you suspected </font>90479 and 111145<br>
they should be the same. the solenoid field has to be on because
this<br>
analysis requires tracking.<br>
<br>
and yes to the last question.<br>
<br>
Beni<br>
<br>
<div class="moz-cite-prefix">On 12/2/22 10:11, Justin Stevens wrote:<br>
</div>
<blockquote type="cite"
cite="mid:8583FF0C-77E9-4758-9689-49B109717DCE@jlab.org">
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Hi Beni,
<div><br>
</div>
<div>Thanks for the report. Are the run number labels on the
bottom two 1D plots correct or should they be 90479 and 111145
(left and right) to match the 2D plots? And were the run
conditions the same for 81511 and 111145, just to be sure we’re
looking at the same conditions for PrimEx for everything besides
the SC?</div>
<div><br>
</div>
<div>-Justin<br>
<div><br>
<blockquote type="cite">
<div>On Dec 2, 2022, at 8:08 AM, Beni Zihlmann via Halld-pid
<a class="moz-txt-link-rfc2396E" href="mailto:halld-pid@jlab.org"><halld-pid@jlab.org></a> wrote:</div>
<br class="Apple-interchange-newline">
<div>
<div><font face="Helvetica, Arial, sans-serif">Hi All,<br>
<br>
to my dismay I have to report that the issue with the
start counter timing is most likely<br>
related to a gain problem with the detector.<br>
the two attached plots files show the DeltaT =
t_paddle - RF_t of paddle 2 at two different<br>
z positions along the beam z=60 (straight section) and
z=90 (nose section)<br>
and below the 2d plots is the projection to the
horizontal axis.<br>
<br>
one can clearly see that the gain is way lower for run
111145 while for the other runs<br>
40k to 90k the gain is much larger.<br>
<br>
I do not understand why that is because the HV read
back is pretty much the same for<br>
all runs. This leads me to believe that either the HV
modules are lying or somehow the<br>
connection of the HV to the detector is not done
right.<br>
<br>
cheers,<br>
Beni<br>
</font></div>
<span id="cid:556703D6-D8B6-4E30-8600-1AC132F1A33A"><paddle2_signals_z60.gif></span><span
id="cid:FB2AED03-2ADC-4251-BF0E-183637B1C611"><paddle2_signals_z90.gif></span>_______________________________________________<br>
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</blockquote>
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<br>
</div>
</blockquote>
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