[Clas12_rgb] Harp Wire Run
Efrain Patrick Segarra
segarrae at mit.edu
Fri Mar 1 11:39:31 EST 2019
Hi Stepan,
Yes, 3.2m is right in front of BAND. Furthest BAND layer sits at 3meters upstream the target.
I would’ve expected to see the harp wire much further up. I also see an excess ~-400cm in DC track vertices, but nothing else upstream target for 15meters .
--
Efrain Segarra
From: Stepan Stepanyan <stepanya at jlab.org>
Date: Friday, March 1, 2019 at 11:28
To: Efrain Patrick Segarra <segarrae at mit.edu>
Cc: "clas12_rgb at jlab.org" <clas12_rgb at jlab.org>
Subject: Re: Harp Wire Run
Efrain,
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.
The other two “peaks” from the cryo target cell and the scattering chamber downstream window.
Regards, Stepan
On Mar 1, 2019, at 10:48 AM, Efrain Patrick Segarra <segarrae at mit.edu<mailto:segarrae at mit.edu>> wrote:
Hi Stepan,
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.
I’m looking at REC::Track bank, which IF we have tracks from harp, Nathan said they will be in there.
I’ll send update as soon as I have that,
--
Efrain Segarra
From: Efrain Patrick Segarra <segarrae at mit.edu<mailto:segarrae at mit.edu>>
Date: Friday, March 1, 2019 at 10:37
To: Stepan Stepanyan <stepanya at jlab.org<mailto:stepanya at jlab.org>>
Subject: Re: Harp Wire Run
Hi Stepan,
Attached here.
I spoke with Veronique and she mentioned there is likely a cut in eventbuilder that requires physical target location.
I’m waiting for when Nathan is free to confirm this,
--
Efrain Segarra
From: Stepan Stepanyan <stepanya at jlab.org<mailto:stepanya at jlab.org>>
Date: Friday, March 1, 2019 at 10:30
To: Efrain Patrick Segarra <segarrae at mit.edu<mailto:segarrae at mit.edu>>
Subject: Re: Harp Wire Run
Hi Efrain,
Thanks for sending this info.
Can you plot vertex distribution starting from -7000 to 1000 (your x-axis) and have y-axis in log scale.
Stepan
On 3/1/19 10:10 AM, Efrain Patrick Segarra wrote:
Hi Stepan,
The file for the harp wire run is at:
/volatile/clas12/hauenst/jaw-0.8/hipo_6345_round1-all.hipo
There are 3 cooked splits inside this one hipo file.
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.
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.
--
Efrain Segarra
Massachusetts Institute of Technology
Physics PhD Candidate
NSF & Ford Fellow
web.mit.edu/segarrae/www/<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fweb.mit.edu%2Fsegarrae%2Fwww%2F&data=02%7C01%7Cclas12_rgb%40jlab.org%7C511f4072a492465c358608d69e648ac1%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636870552018531931&sdata=5QeB29EEaVN34YAUVP52euPSlT7%2BhSnKbkIlsGPt%2FSU%3D&reserved=0>
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