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Drift property in non-uniform B field.

Drift property in non-uniform B field. T.Sawada June 18, 2004. Electron drift in E and non-uniformed B field. Drift velocity of electron in E, B field (Langevin equation) First order Runge-Kutta integration was applied. Strategy of correction. Determine by the data of B=0 (vd=5cm/usec).

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Drift property in non-uniform B field.

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  1. Drift property in non-uniform B field. T.Sawada June 18, 2004

  2. Electron drift in E and non-uniformed B field • Drift velocity of electron in E, B field (Langevin equation) • First order Runge-Kutta integration was applied

  3. Strategy of correction • Determine by the data of B=0 (vd=5cm/usec). • Execute Runge-Kutta intergration in non-uniform B

  4. Run # 28911 (CR) before correction Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer Z (mm) Layer-dependence of resZ Z-dependence of resZ ( at -1400 < z < -1300 )

  5. Run # 28911 (CR) before correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 0 Layer = 1

  6. Run # 28911 (CR) before correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 2 Layer = 3

  7. Run # 28911 (CR) before correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 4 Layer = 5

  8. Run # 28911 (CR) before correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 6 Layer = 7

  9. Run # 28911 (CR) before correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 8 Layer = 9

  10. Run # 28911 (CR) before correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 10 Layer = 11

  11. Run # 28911 (CR) before correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 12 Layer = 13

  12. Run # 28911 (CR) after correction Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer Z (mm) Layer-dependence of resZ Z-dependence of resZ ( at -1400 < z < -1300 )

  13. Run # 28911 (CR) after correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 0 Layer = 1

  14. Run # 28911 (CR) after correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 2 Layer = 3

  15. Run # 28911 (CR) after correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 4 Layer = 5

  16. Run # 28911 (CR) after correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 6 Layer = 7

  17. Run # 28911 (CR) after correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 8 Layer = 9

  18. Run # 28911 (CR) after correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 10 Layer = 11

  19. Run # 28911 (CR) after correction ( -1400 < z < -1300 ) Cut condition: chi2Pad > 0.02 , chi2Z > 0.02 , -0.4 < lambda (dip angle) <0.4 resZ (mm) resZ (mm) Layer = 12 Layer = 13

  20. Summary • The Mean Value of the residual of Layer(5～13) aprroached almost 0 !! ( Correction of Layer(0～1) is parhaps needed consideration of non-uniformity of the electronic field around Target-holder. ) • I intend to study the following in future : 　＞ improvement of resZ of Layer(0～4) ＞ Z-dependance of resZ.

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