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]] | + | * Update from Steve: [[File:Efficiencies_and_Accidentals_20190416.pdf]] |
− | *Update from Rachel [[https://hallaweb.jlab.org/wiki/images/0/00/Montgomery_UpdateTDIS_160419.pdf]] | + | * Update from Rachel: [[https://hallaweb.jlab.org/wiki/images/0/00/Montgomery_UpdateTDIS_160419.pdf]] |
+ | |||
+ | ==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== | ==Organizational details== |
Revision as of 12:41, 16 April 2019
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Agenda
- Update from Steve: File:Efficiencies and Accidentals 20190416.pdf
- Update from Rachel: [[1]]
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:
- To join via Room System:
- Video Conferencing System: bjn.vc -or-199.48.152.152
- Meeting ID : 550335940
- To join via phone :
- Dial:
- +1.408.740.7256 (United States)
- +1.888.240.2560 (US Toll Free)
- +1.408.317.9253 (Alternate number)
- (see all numbers - http://bluejeans.com/numbers)
- Enter Conference ID : 550335940
- Dial: