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<p>Dear Xiaochao,</p>
<p><br>
</p>
<p>Sorry for my worse network in last meeting. I list what we care
as following:</p>
<p>1 about the energy resolution and light yield:<br>
</p>
<p> As I understand, we define the energy resolution of ECal
with 1 GeV electron. I did quickly caculate: muon deposite energy
about 2 MeV/(g.cm-2) in carbon, totle thinkess of scintillator is
30 g/cm2, so muon deposite 60 MeV in scintillator. 1 GeV electron
almost deposite all energy in ECal, the mass ratio of scintillator
and lead is Msc/Mpb=0.3, so about 300MeV deposited in
scintillator. <br>
</p>
<p><br>
</p>
<p>So 1 GeV electon light yield is 5 (300/60) times high than single
muon. If this is truth, we will receive more than 2500 PE (the
old module already reach 500 PE per muon). So the energy
resolution will be good enough.<br>
</p>
<p><br>
</p>
<p> We need your GEANT simulation to confirm the quirk calculation.
<br>
</p>
<p><br>
</p>
<p>2 The assambly support</p>
<p>We once manufactured the assambly support according to Xiaochao
provided drawing. We find some problem to assamble the modules
with these support. Do we have new idea on assambling the module?
The new module should match the assembly support, which also
effect how to build the module, especially on the fible
processing.<br>
</p>
<p><br>
</p>
<p> 3 PMT and divide</p>
<p><br>
</p>
<p>who is charge of the PMT and the high voltage divider? the signal
is also depended on PMT and divide. <br>
</p>
<p><br>
</p>
<p>With best,</p>
<p>Cunfeng<br>
</p>
<p><br>
</p>
<div class="moz-cite-prefix">在 2020/5/7 2:14, Xiaochao Zheng 写道:<br>
</div>
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Dear All:<br>
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<div class="x_x_PlainText">We will have
our next EC/DAQ meeting at 9:15am on
Thursday 5/7/2020. The call-in
information is as usual, see below.<br>
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<div class="x_x_PlainText">(For our
Chinese collaborators, please double
check the timing difference between
China and US EDT.)<br>
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<div class="x_x_PlainText">Cheers,</div>
<div class="x_x_PlainText"><br>
Thanks,<br>
<br>
Xiaochao<br>
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