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<div class="" style="word-wrap:break-word; line-break:after-white-space">Efrain,
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<div class="">Attached is the distribution of the z-vertex of tracks in CLAS12 FD (DC tracks) REC::PARTICLE bank. I can see a peak (bump) 3.2 meters upstream. This is I believe where cryostat is, but I am not sure. I asked Cyril to give me a drawing or the
distance from the Harp to the target.</div>
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<div class="">The other two “peaks” from the cryo target cell and the scattering chamber downstream window. </div>
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<div class="">Regards, Stepan</div>
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<div class="">On Mar 1, 2019, at 10:48 AM, Efrain Patrick Segarra <<a href="mailto:segarrae@mit.edu" class="">segarrae@mit.edu</a>> wrote:</div>
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<span class="" style="font-size:11pt">Hi Stepan,</span></div>
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<span class="" style="font-size:11pt">Just to follow up, I spoke with Nathan and I was looking at the REC::Particle bank, which has more requirements that might kill our tracks from harp.</span></div>
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<span class="" style="font-size:11pt">I’m looking at REC::Track bank, which IF we have tracks from harp, Nathan said they will be in there.</span></div>
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<span class="" style="font-size:11pt">I’ll send update as soon as I have that,</span></div>
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<span class="" style="font-size:10pt; font-family:"Times New Roman",serif; color:rgb(108,108,108)">Efrain Segarra</span><span class="" style="font-size:11pt"></span></div>
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<b class=""><span class="" style="">From:<span class="x_Apple-converted-space"> </span></span></b><span class="" style="">Efrain Patrick Segarra <<a href="mailto:segarrae@mit.edu" class="">segarrae@mit.edu</a>><br class="">
<b class="">Date:<span class="x_Apple-converted-space"> </span></b>Friday, March 1, 2019 at 10:37<br class="">
<b class="">To:<span class="x_Apple-converted-space"> </span></b>Stepan Stepanyan <<a href="mailto:stepanya@jlab.org" class="">stepanya@jlab.org</a>><br class="">
<b class="">Subject:<span class="x_Apple-converted-space"> </span></b>Re: Harp Wire Run</span></div>
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<span class="" style="font-size:11pt">Hi Stepan,</span></div>
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<span class="" style="font-size:11pt">Attached here.</span></div>
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<span class="" style="font-size:11pt">I spoke with Veronique and she mentioned there is likely a cut in eventbuilder that requires physical target location.</span></div>
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<span class="" style="font-size:11pt">I’m waiting for when Nathan is free to confirm this,</span></div>
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<span class="" style="font-size:10pt; font-family:"Times New Roman",serif; color:rgb(108,108,108)">Efrain Segarra</span></div>
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<b class=""><span class="" style="">From:<span class="x_Apple-converted-space"> </span></span></b><span class="" style="">Stepan Stepanyan <<a href="mailto:stepanya@jlab.org" class="">stepanya@jlab.org</a>><br class="">
<b class="">Date:<span class="x_Apple-converted-space"> </span></b>Friday, March 1, 2019 at 10:30<br class="">
<b class="">To:<span class="x_Apple-converted-space"> </span></b>Efrain Patrick Segarra <<a href="mailto:segarrae@mit.edu" class="">segarrae@mit.edu</a>><br class="">
<b class="">Subject:<span class="x_Apple-converted-space"> </span></b>Re: Harp Wire Run</span></div>
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Hi Efrain,<br class="">
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Thanks for sending this info.<br class="">
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Can you plot vertex distribution starting from -7000 to 1000 (your x-axis) and have y-axis in log scale.<br class="">
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Stepan</p>
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On 3/1/19 10:10 AM, Efrain Patrick Segarra wrote:</div>
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<span class="" style="font-size:11pt">Hi Stepan,</span></div>
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<span class="" style="font-size:11pt">The file for the harp wire run is at:</span></div>
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<span class="" style="font-size:11pt"> <span class="x_Apple-converted-space"> </span></span><span class="x_s1">/volatile/clas12/hauenst/jaw-0.8/hipo_6345_round1-all.hipo</span></div>
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<span class="" style="font-size:11pt">There are 3 cooked splits inside this one hipo file.</span></div>
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<span class="" style="font-size:11pt">I took a look at the distribution you suggested – electron vertex – and after cooking, I don’t see anything that corresponds to tracks coming from the harp wire, which I would expect ~meters from actual target.</span></div>
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<span class="" style="font-size:11pt">I would think that the reconstruction cooking has some broad cuts on reasonable vertex position allowed. I’ll talk to Nathan or Veronique about this.</span></div>
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<span class="" style="font-size:10pt">Efrain Segarra</span></div>
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<span class="" style="font-size:10pt">Massachusetts Institute of Technology</span></div>
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<span class="" style="font-size:10pt">Physics PhD Candidate</span></div>
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<span class="" style="font-size:10pt">NSF & Ford Fellow</span></div>
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