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Dear Whitney,<br>
<br>
Yes it will be good to see your results with high statistics, to
look at the details for the comparison between the 2 methods.<br>
<br>
I have 2 questions:<br>
<br>
<ol>
<li> your results show that the occupancies in RII are higher than
RI. We need to understand that also.</li>
<li>Can you read the Geometry data base the same as Mauri, if you
could that will be the best. This way we can take out this input
from the equation and we can focus on the simulation part.</li>
<li>The graphs that Volker asked for are produced based on which
one of your methods?</li>
<li>In producing these graphs could you also have them by particle
type?<br>
</li>
</ol>
<br>
Best regards,<br>
<br>
Latifa<br>
<br>
<div class="moz-cite-prefix">On 2/12/16 8:14 AM, burkert wrote:<br>
</div>
<blockquote cite="mid:56BDDABF.90907@jlab.org" type="cite">Whitney,
<br>
<br>
Thanks for your response. The graphs are of interest, however, I
believe they are not the same as the ones Mauri is showing. Mauri
can correct me, but I think he is plotting the z position along
the beamline where any of the hits in the chambers originated
from. This allows one to determine the material around the
beamline that caused the hits even if it goes through secondary
and tertiary stages. You expect then a peak at the target for
direct hits, and hits coming. e.g. from Moeller electrons produced
in the target but hitting a beamline element further downstream
that causes a shower and subsequently hits in the chambers. Such
a 1-D plot will allow us to compare your simulations with Mauri's
and identify structures along the beam that may present obstacles
to the Moeller electrons.
<br>
<br>
Volker
<br>
<br>
<br>
<br>
<br>
On 2/11/16 8:42 PM, Whitney R. Armstrong wrote:
<br>
<blockquote type="cite">Hi Volker,
<br>
<br>
I have produced two graphs, however, with limited statistics
(~1.5M). Many more jobs are running on the farm right now.
<br>
<br>
The first shows (in cylindrical coordinates) the radial vs z
position of the starting point for the trajectory that
ultimately produced at hit in the DC.
<br>
<br>
The second shows the wire number of the DC hit vs the same z as
above.
<br>
I will post these results on the wiki when I have gathered more
statistics.
<br>
Your comments and questions are appreciated.
<br>
<br>
Cheers,
<br>
Whit
<br>
<br>
<br>
On Thu, Feb 11, 2016 at 08:37:45AM -0500, burkert wrote:
<br>
<blockquote type="cite">Hi Whitney,
<br>
<br>
Could you produce a graph similar to the one from Maurizio
(attached) showing where along the beamline (z-coordinate) the
chamber hits originate from.
<br>
<br>
Volker
<br>
<br>
<br>
On 2/11/16 1:41 AM, Whitney R. Armstrong wrote:
<br>
<blockquote type="cite">Dear Collaborators,
<br>
<br>
First, I have posted some follow-up slides to our discussion
on Monday. The new plots have a hit definition that is
consistent with Maurizio's.
<br>
You can find my slides and the follow slides at
<a class="moz-txt-link-freetext" href="https://clasweb.jlab.org/wiki/index.php/CLAS12_High_Luminosity_-_February_8,_2016">https://clasweb.jlab.org/wiki/index.php/CLAS12_High_Luminosity_-_February_8,_2016</a><br>
<br>
Secondly, as suggested by Latifa, I have performed a self
consistency check using the beam on target method previously
used. Furthermore, I am using the same beamline geometry as
Maurizio, who has graciously provided a GDML version of the
geometry.
<br>
<br>
Please see the following page for the latest results and
discussion of the simulations.
<a class="moz-txt-link-freetext" href="https://clasweb.jlab.org/wiki/index.php/CLAS12_Drift_Chamber_Occupancy_Simulations">https://clasweb.jlab.org/wiki/index.php/CLAS12_Drift_Chamber_Occupancy_Simulations</a><br>
<br>
So far the main conclusions are that my simulation is self
consistent, and perhaps more importantly, I am getting
significantly larger DC occupancies. The cause of this
discrepancy remains unclear.
<br>
<br>
Any comments or questions are greatly appreciated.
<br>
<br>
Cheers,
<br>
Whit
<br>
<br>
<br>
</blockquote>
<br>
</blockquote>
<br>
<br>
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