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More Results From Simulation

JC and Marina 01/15/01. More Results From Simulation. Equivalent track angle of Lorentz effect Comparison with ATLAS magnet results Effective temperature in diffusion constant Angular fit of  distribution. Lorentz Angle.

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More Results From Simulation

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  1. JC and Marina 01/15/01 More Results From Simulation • Equivalent track angle of Lorentz effect • Comparison with ATLAS magnet results • Effective temperature in diffusion constant • Angular fit of  distribution

  2. Lorentz Angle Lorentz angle is not a constant along z, shown are overall effects Larger bias voltage  Larger E field  Smaller mobility  Smaller Lorentz angle Syracuse University

  3. Lorentz Angle Comparison Magnetic field: 1.4 Tesla Udepletion is calculated with effective thickness of the sensor Syracuse University

  4. Diffusion Constant Einstein equation: D = k T m / q Reduce Teff from 390K to 300K  Reduce fraction of doublet by 1.4% Syracuse University

  5. Angular Fit With  Distribution FPIX0-Pstop Normal Incidence Data • MC: 0.5 interval, interpolation between points • Normal incident data:  = (1.77  0.09) Syracuse University

  6. 15° Data 20° Data 10° Data 5° Data   Angular Fit With  Distribution FPIX0-Pstop Syracuse University

  7. Detector Inclination Angle • In MINUIT fit, the beam is assumed to be normal incident on the first SSD, the overall rotation of the detector can not be fitted. • The error from the fit is about 0.1°, which should be smaller than error from MC model. • For large angle, the  fit is not very sensitive to angle. • We can consider that the spectrometer is at 1.5° to the beam direction. Syracuse University

  8. Sensitivity of  Fit FPIX0 Pstop at 20 The shape of  distribution at large angle is not as sensitive to track angle as at small angle Syracuse University

  9. Sensitivity of  Fit Angular Sensitivity of  Distribution  Syracuse University

  10. Summary • The Lorentz angle generated agrees with ATLAS results • The effect of effective temperature on diffusion is small but may need to be considered • The fit of  distribution shows that the spectrometer is at 1.5 degree with respect to beam direction Syracuse University

  11. Effect of Signal Coupling • A simple linear coupling between neighbor rows • Smearing effect of linear coupling can be taken away with  correction • Small coupling (5-10%) improves the resolution Syracuse University

  12. Effect of Signal Coupling A simple linear coupling between neighbor rows Syracuse University

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