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<div class="moz-cite-prefix">Hi Naomi,<br>
<br>
Indeed very nice! I think you are using 1-propanol, though.<br>
<br>
Best regards,<br>
Fernando<br>
<br>
<br>
On 1/26/2015 2:29 PM, Beni Zihlmann wrote:<br>
</div>
<blockquote cite="mid:54C6957F.7050802@jlab.org" type="cite">Hi
Naomi,
<br>
<br>
nice results. If you take this data on face value and plot and fit
<br>
them (see picture) and then find the x-values for MPV (621)
<br>
and drift-time(572) you get very similar results.
<br>
MPV -> 57.3% Argon (quadratic fit no free parameters any more
with only 3 points)
<br>
Drift-time -> 57.6% Argon (linear fit)
<br>
<br>
this of course assuming the iso-propanol does not do anything.
<br>
<br>
cheers,
<br>
Beni
<br>
<br>
<br>
<br>
<blockquote type="cite">I now have the cosmics data with the
prototype using JLab (production)
<br>
preamp & hvb. Thankfully there is no significant difference
between that
<br>
and the data using CMU (First article/prototype) electronics.
<br>
<br>
The data set which I showed at the meeting for 55/45 had been
analyzed
<br>
using the window times for the JLab data, ie this one set was
complete
<br>
garbage.
<br>
<br>
The progression in MPV amplitude & max drift time with Argon
is
<br>
<br>
50% Ar max-amp MPV 204, max drift time 673ns
<br>
55% Ar max-amp MPV 425, max drift time 609ns
<br>
60% Ar max-amp MPV 932, max drift time 541ns
<br>
<br>
For the CDC at JLab run 2016 cosmics I found
<br>
<br>
max-amp MPV 621, max drift time 572ns
<br>
<br>
<br>
The wire used for the CDC is slightly larger diameter than the
prototype
<br>
(20um, 18um) and the straw radius is slightly smaller (0.77cm,
0.79cm).
<br>
<br>
The histograms are here:
<br>
<a class="moz-txt-link-freetext" href="https://halldweb1.jlab.org/wiki/index.php/CDC_prototype_runs_at_CMU">https://halldweb1.jlab.org/wiki/index.php/CDC_prototype_runs_at_CMU</a>
<br>
<br>
<br>
Naomi.
<br>
<br>
<br>
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</blockquote>
<br>
<br>
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