Difference between revisions of "March 8, 2013 PID Upgrade"

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== Connections ==
 
== Connections ==
−
To connect from the outside, please use ESNET<br/>
+
To connect from the outside, please use ESNET or SeeVogh <br/>
 
# ) ESNET: 8542553<br/>
 
# ) ESNET: 8542553<br/>
−
# ) EVO: 147880<br/> A conference has been booked under "GlueX PID Upgrade" from 12:30pm until 4:00pm (EDT).
+
# ) SeeVogh: A conference has been booked under "GlueX PID Upgrade" from 1:00pm until 3:00pm (EDT).
−
## ) To phone into an EVO meeting, from the U.S. call (626) 395-2112 and then enter the EVO meeting code, 147880. Instructions for the
+
## ) To phone into an SeeVogh meeting, from the U.S. call (626) 395-2112 and then enter the EVO meeting code, 155025.
−
## )[http://evo.caltech.edu/evoGate/Documentation/extclient/telephone/telephone.html Phone Bridge] to EVO.  
+
## ) To use the SeeVogh Java script use the [http://research.seevogh.com SeeVogh link].
−
## ) [http://evo.caltech.edu/evoGate/Documentation/extclient/skype/skype.html Skype Bridge] to EVO
+
−
# )To connect by telephone, dial:
+
−
## ) You can look up toll-free number at http://www.readytalk.com/intl
+
−
## ) US and Canada: (866)740-1260 (toll free)<br/>
+
−
## ) International: (303)248-0285 (toll call)
+
−
## ) enter access code followed by the # sign: 3421244#<br/>
+
  
 
== Agenda ==
 
== Agenda ==
 +
 +
# Announcements
 +
# [https://halldweb.jlab.org/wiki/index.php/File:CerenkovEMBackground3.8.13.pdf Cherenkov EM Backgrounds] (John)
 +
# [https://halldweb.jlab.org/wiki/index.php/File:Pidupgrade3.7.13.pdf Recoil proton] (Justin)
 +
# AOB
 +
 +
 +
== Minutes ==
 +
 +
Cherenkov EM Backgrounds:
 +
 +
* Study of EM backgrounds in the forward gas threshold cherenkov
 +
* Pileup EM interactions added in the bggen generator and MC trajectories traced to the detector volume
 +
* Most background electrons at very forward angles (theta < 2) so this region was excluded
 +
* Conclusions:
 +
** 1 photoelectron threshold vetos ~99% of pions above 3 GeV (Question of what is PMT/electronics noise which may set the lower bound for the threshold, work on for next meeting)
 +
** 21% of events have a background electron producing cherenkov light in the detector which causes some kaons to be misidentified, but simple to overcome with multiple segments
 +
 +
Recoil Proton:
 +
 +
* Study of eta'(2300) and h'(2600) channels with reconstructed recoil proton compared to previous missing proton analysis
 +
* Significant gains in both channels when the proton is reconstructed with up to S/B ~ 30, but efficiencies may be too low
 +
* For the next 2 weeks the focus will be on completing the analysis of the four channels from last year's PAC proposal with larger statistics
 +
* To study the case for the PID upgrade plan to apply John's toy model for the gas threshold detector to improve efficiency but maintain high purity
 +
* Also discussed studying channels with neutrals or a recoil neutron where the impact of upgraded PID may be more significant

Latest revision as of 06:17, 1 April 2015

Meeting Time and Place

Friday March 8, 2013 at 1:30pm At Jefferson Lab, the meeting will be held in F326

Connections

To connect from the outside, please use ESNET or SeeVogh

  1. ) ESNET: 8542553
  2. ) SeeVogh: A conference has been booked under "GlueX PID Upgrade" from 1:00pm until 3:00pm (EDT).
    1. ) To phone into an SeeVogh meeting, from the U.S. call (626) 395-2112 and then enter the EVO meeting code, 155025.
    2. ) To use the SeeVogh Java script use the SeeVogh link.

Agenda

  1. Announcements
  2. Cherenkov EM Backgrounds (John)
  3. Recoil proton (Justin)
  4. AOB


Minutes

Cherenkov EM Backgrounds:

  • Study of EM backgrounds in the forward gas threshold cherenkov
  • Pileup EM interactions added in the bggen generator and MC trajectories traced to the detector volume
  • Most background electrons at very forward angles (theta < 2) so this region was excluded
  • Conclusions:
    • 1 photoelectron threshold vetos ~99% of pions above 3 GeV (Question of what is PMT/electronics noise which may set the lower bound for the threshold, work on for next meeting)
    • 21% of events have a background electron producing cherenkov light in the detector which causes some kaons to be misidentified, but simple to overcome with multiple segments

Recoil Proton:

  • Study of eta'(2300) and h'(2600) channels with reconstructed recoil proton compared to previous missing proton analysis
  • Significant gains in both channels when the proton is reconstructed with up to S/B ~ 30, but efficiencies may be too low
  • For the next 2 weeks the focus will be on completing the analysis of the four channels from last year's PAC proposal with larger statistics
  • To study the case for the PID upgrade plan to apply John's toy model for the gas threshold detector to improve efficiency but maintain high purity
  • Also discussed studying channels with neutrals or a recoil neutron where the impact of upgraded PID may be more significant
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