Difference between revisions of "TDIS Bi-monthly meeting, 2019 April 16"

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==Agenda==
 
==Agenda==
*Update from Steve: [[File:Efficiencies_and_Accidentals_20190416.pdf]]
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* Update from Steve: [[File:Efficiencies_and_Accidentals_20190416.pdf]]
*Update from Rachel [[https://hallaweb.jlab.org/wiki/images/0/00/Montgomery_UpdateTDIS_160419.pdf]]
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* Update from Rachel: [[https://hallaweb.jlab.org/wiki/images/0/00/Montgomery_UpdateTDIS_160419.pdf]]
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==Minutes==
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* Update from Steve:
 +
** geometric transverse length of tracks as a function of their angle (knowing the longer this length, the better the resolution). Efficiencies zeroes at 30 deg for 6cm transverse length. Would 4cm allow for better resolution ?
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** accidentals:
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*** EPC validated against p photoproduction from MAID (factor 2 "agreement": good enough for that purpose + EPC is giving the higher rates).
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*** - TDIS off proton: 0.5% chance for an electron to be associated with an accidental proton in the optimistic scenario (\sigma_t = 20ns, \sigma_z = 1cm), and 10 times as much for the pessimistic case (\sigma_t = 100ns, \sigma_z = 2cm) => to be compared with TDIS!
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*** - TDIS off deuteron: more complicated. For fully accidental D(e,e'p_{fwd}p_{bkwd}) shall be 0.4% (of all detected scattered electrons ?) in the optimistic scenario, and 40% (!) in the pessimistic scenario. To this should be added true D(e,e'p_{fwd}) with accidental p_{bkwd} => 5% - 50%
  
 
==Organizational details==
 
==Organizational details==

Revision as of 12:41, 16 April 2019

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Agenda

Minutes

  • Update from Steve:
    • geometric transverse length of tracks as a function of their angle (knowing the longer this length, the better the resolution). Efficiencies zeroes at 30 deg for 6cm transverse length. Would 4cm allow for better resolution ?
    • accidentals:
      • EPC validated against p photoproduction from MAID (factor 2 "agreement": good enough for that purpose + EPC is giving the higher rates).
      • - TDIS off proton: 0.5% chance for an electron to be associated with an accidental proton in the optimistic scenario (\sigma_t = 20ns, \sigma_z = 1cm), and 10 times as much for the pessimistic case (\sigma_t = 100ns, \sigma_z = 2cm) => to be compared with TDIS!
      • - TDIS off deuteron: more complicated. For fully accidental D(e,e'p_{fwd}p_{bkwd}) shall be 0.4% (of all detected scattered electrons ?) in the optimistic scenario, and 40% (!) in the pessimistic scenario. To this should be added true D(e,e'p_{fwd}) with accidental p_{bkwd} => 5% - 50%

Organizational details

10:30 AM, JLab meeting room: TED 2547
To join the Meeting:
https://bluejeans.com/550335940
To join via Room System:
Video Conferencing System: bjn.vc -or-199.48.152.152
Meeting ID : 550335940
To join via phone :
  1. Dial:
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    +1.888.240.2560 (US Toll Free)
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    (see all numbers - http://bluejeans.com/numbers)
  2. Enter Conference ID : 550335940