FNAL beam test simulation with Geant4.10.01 Aiwu Zhang Florida Tech 2015-01-20.

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Presentation transcript:

FNAL beam test simulation with Geant Aiwu Zhang Florida Tech

Geant4 geometry All materials (mylar, Al drift, Cu/Ni/Au r/o, G10, FR4, Ar/CO2, etc…) are implemented. HoneyComb is replaced by 0.1mm mylar film. GEM holes are not implemented. No r/o strips. Origin is in the center. Input particle is set to be a point beam, normal incident, 20 mm in front of REF1. Physics list used is FTFP_BERT: In which Multiple Scattering model (based on the Lewis theory) is included: html No resolution smearing on the detectors. The results will reflect the “intrinsic” resolutions. 2

What are studied at the first step: Build exclusive and inclusive residuals for: (1) four trackers (2) FITEIC, in Cartesian coordinates. Compared: [ 32GeV/c, 120GeV/c ] [pi-, proton] 20k events are simulated for each run. The plots in X coordinate will be shown in the following. (plots in Y are very similar). Both resolutions will be shown in tables. 3

32GeV/c pi- position distributions REF1XREF2X REF3XREF4X FIT_EIC_X Divergence of the ‘beam’ is clear. Units in all plots are in mm. 4

120GeV/c pi- position distributions REF1XREF2X REF3XREF4X FIT_EIC_X Divergence of the ‘beam’ is much smaller than the 32GeV/c case. Units in all plots are in mm. 5

32GeV/c proton position distributions REF1XREF2X REF3XREF4X FIT_EIC_X Divergence of the ‘beam’ is clear and very similar to the 32GeV/c Pions. Units in all plots are in mm. 6

120GeV/c proton position distributions REF1XREF2X REF3XREF4X FIT_EIC_X Divergence of the ‘beam’ is much smaller than the 32GeV/c case. Similar to the 120GeV/c pion case Units in all plots are in mm. 7

32GeV/c pi- residual distributions REF1X Exclusive REF1X Inclusive Units all in um REF2X Exclusive REF2X Inclusive GeoMean: 45um GeoMean: 39um 8

32GeV/c pi- residual distributions REF3X Exclusive REF3X Inclusive Units all in um REF4X Exclusive REF4X Inclusive GeoMean: 26um GeoMean: 41um 9

32GeV/c pi- residual distributions for FITEIC FITEIC_X Exclusive FITEIC_X Inclusive Units all in um FITEIC_Y Exclusive FITEIC_Y Inclusive GeoMean: 56um 10

120GeV/c pi- residual distributions REF1X Exclusive REF1X Inclusive Units all in um REF2X Exclusive REF2X Inclusive GeoMean: 12um GeoMean: 10um 11

120GeV/c pi- residual distributions REF3X Exclusive REF3X Inclusive Units all in um REF4X Exclusive REF4X Inclusive GeoMean: 7um GeoMean: 11um 12

120GeV/c pi- residual distributions for FITEIC FITEIC_X Exclusive FITEIC_X Inclusive Units all in um FITEIC_Y Exclusive FITEIC_Y Inclusive GeoMean: 15um 13

Comparison tables 32GeV/c pi-120GeV/c pi- ExEx_errInIn_errGMGM_errExEx_errInIn_errGMGM_err REF1X REF1Y REF2X REF2Y REF3X REF3Y REF4X REF4Y FITEIC_X FITEIC_Y GeV/c proton120GeV/c proton REF1X REF1Y REF2X REF2Y REF3X REF3Y REF4X REF4Y FITEIC_X FITEIC_Y Units in um 14

Resolutions for trackers Ex_expIn_expGM_exp Ex_G4In_G4GM_G4 Corrected resolution 32GeV/c pion case REF1X REF1Y REF2X REF2Y REF3X REF3Y REF4X REF4Y Ex_expIn_expGM_exp Ex_G4In_G4GM_G4 120 GeV/c proton REF1X REF1Y REF2X REF2Y REF3X REF3Y REF4X REF4Y

Resolutions for FIT EIC chamber (zigzag) 16

Scattering angles Polar angle reflects the divergence of ‘beam’, ie., the scattering effect. The polar angle is also dependent on the distance between detectors. 17

Pi-, 32GeV/c Rho between REF2 and REF1 Pi-, 120GeV/c Rho between REF2 and REF1 Pi-, 32GeV/c Rho between REF4 and REF1 Pi-, 120GeV/c Rho between REF4 and REF1 Pi-, 32GeV/c Rho between REF4 and REF3 Pi-, 120GeV/c Rho between REF4 and REF3 Rho 18

Pi-, 32GeV/c theta between REF2 and REF1 Pi-, 120GeV/c theta between REF2 and REF1 Pi-, 32GeV/c theta between REF4 and REF1 Pi-, 120GeV/c theta between REF4 and REF1 Pi-, 32GeV/c theta between REF4 and REF3 Pi-, 120GeV/c theta between REF4 and REF3 Theta 19

Rho anglesunit in urad REF2-REF1REF4-REF1REF4-REF3 meanrmsmeanrmsmeanrms 32GeV/c pi GeV/c pi GeV/c proton GeV/c proton Comparison tables Summary 20