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

Revision as of 13:41, 16 April 2019

10:30 AM, JLab meeting room: TED 2547

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Video Conferencing System: bjn.vc -or-199.48.152.152

Meeting ID : 550335940

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 ==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==