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HES HKS meeting

E05-115 experimental setup in JLab Hall C (2009). HES HKS meeting. 15 Nov 2010 T.Gogami. Content. e , e+ rejection in h_tof_pre.f POSI Electron rate Moller. REAL DATA. e , e’ background. Reject e,e + in h_tof _pre.f. NO CHANGE FOR OPTICS K +. h_tof_pre.f.

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HES HKS meeting

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  1. E05-115 experimental setup in JLab Hall C (2009) HES HKS meeting 15 Nov 2010 T.Gogami

  2. Content • e , e+ rejection in h_tof_pre.f • POSI • Electron rate • Moller

  3. REAL DATA e , e’ background Reject e,e+ in h_tof_pre.f • NO CHANGE FOR • OPTICS • K+ h_tof_pre.f

  4. File size and analysis time File size  46% ~ 78 % Time  90%

  5. Number Reconstruction with POSI ~ 4 [MHz] HES single

  6. Theta vs. Phi cut Chromium target SIMULATION • HES • EDCTrig • EYQ1i > -4.7 [cm] • POSI • Electron flag

  7. SIMULATION Electron Rates Events :92/(2G) 700 – 988 [MeV/c] 2.3 ± 0.24 [MHz] at 7.9 [μA] ~ OK Electrons which are not on optics. Simulation is loose

  8. SIMULATION Added new leaves ( POSI ) • Electron • Beam Passing through • Ionization • Brems. • Photon • Compton scattering • Photoelectric effect • Photon conversion

  9. CALCULATION Cross section of Moller scattering

  10. Summary and to do • Summary • e , e+ rejection in h_tof_pre.f • POSI • Electron rate • Moller • to do • Analysis • Residual of chambers for each arm. • HES tracking • Strangeness 2010 in KEK • Preparation • タイヤ交換

  11. End

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