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Study of the SPD Performance from Test Beam Data

A detailed analysis of the performance of the ALICE Silicon Pixel Detector (SPD) using test beam data, including comparisons with previous sensors and simulation results.

elizabethgoddard
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Study of the SPD Performance from Test Beam Data

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  1. Study of the SPD performance from test beam data D. Elia, R. Santoro – Bari SPD Group • Outline: • study of 2003 test beam data (300 mm sensor) • comparison with thin (200 mm) sensor from 2002 tb • comparison with AliRoot simulation (Giuseppe’s talk) ALICE Offline week - February 23, 2005

  2. Minibus 3 Test chip Minibus 2 256 rows 425 mm 50 mm 32 columns Beam test in 2003 y x • Test detector: 300 mm sensor • Tracking precision: s(x) = s(y)  10 mm • Full scan of threshold and tilt-angle ALICE Offline week - February 23, 2005

  3. Lx / √12 = 122.7 mm Ly / √12 = 14.4 mm Residuals and resolutions (I) Results @ 200 DAC for normal track incidence angle: spixel(x) = 116.6 mmspixel(y) = 11.0 mm ALICE Offline week - February 23, 2005

  4. Double pixels clusters spixel(x) = 7.7 mm spixel(y) = 9.2 mm Residuals and resolutions (II) Results @ 200 DAC for normal track incidence angle: Single pixel clusters spixel(x) = 120.1 mm spixel(y) = 11.0 mm ALICE Offline week - February 23, 2005

  5. Decreasing threshold Impacts vs cluster size Single-pixel cluster Double-x-pixel cluster Double-y-pixel cluster ALICE Offline week - February 23, 2005

  6. Cluster type vs trk-angle (I) tilt = 0 deg thr = 200 DAC tilt = 10 deg thr = 200 DAC ALICE Offline week - February 23, 2005

  7. Cluster type vs trk-angle (II) tilt = 20 deg vth = 200 DAC tilt = 45 deg thr = 200 DAC ALICE Offline week - February 23, 2005

  8. Cluster size vs trk-angle ALICE Offline week - February 23, 2005

  9. Efficiency vs trk-angle ALICE Offline week - February 23, 2005

  10. Resolution studies (I) ALICE Offline week - February 23, 2005

  11. 214 DAC 210 DAC 180 DAC Resolution studies (II) • Normal track incidence angle: ALICE Offline week - February 23, 2005

  12. Resolution studies (II) • Normal track incidence angle: 214 DAC 210 DAC 180 DAC ALICE Offline week - February 23, 2005

  13. Resolution studies (III) • Normal track incidence angle: ALICE Offline week - February 23, 2005

  14. Resolution studies (IV) • 10o track incidence angle: 200 DAC 180 DAC 150 DAC ALICE Offline week - February 23, 2005

  15. Resolution studies (V) • 20o track incidence angle: 200 DAC 180 DAC 150 DAC All the results on the 300 mm sensor in: “Study of the ALICE Silicon Pixel Detector performance in a beam test at SPS”, D. Elia et al., submitted as ALICE Internal Note ALICE Offline week - February 23, 2005

  16. Minibus 1 Test chip Minibus 0 256 rows 425 mm 50 mm 32 columns Beam test in 2002 y x • Test detector: 200 mm sensor • Tracking precision: s(y)  6 mm • Threshold and tilt-angle scan ALICE Offline week - February 23, 2005

  17. Study of thin sensor (I) Average cluster size: ALICE Offline week - February 23, 2005

  18. 180 160 200 215 Study of thin sensor (II) 300 mm: 200 mm: 180 160 200 215 ALICE Offline week - February 23, 2005

  19. Study of thin sensor (III) Efficiency: ALICE Offline week - February 23, 2005

  20. Study of thin sensor (III) Efficiency: gauss-int fit ALICE Offline week - February 23, 2005

  21. Telescope precision subtracted Study of thin sensor (IV) Residuals and resolutions: ALICE Offline week - February 23, 2005

  22. Single and double pixel clusters: 200 mm 300 mm Study of thin sensor (IV) Residuals and resolutions: ALICE Offline week - February 23, 2005

  23. 200 mm: Study of tilted angle data (I) 300 mm: ALICE Offline week - February 23, 2005

  24. 200 mm: Study of tilted angle data (II) 300 mm: ALICE Offline week - February 23, 2005

  25. Study of tilted angle data (III) 300 mm: @200 DAC 200 mm: @200 DAC ALICE Offline week - February 23, 2005

  26. Study of tilted angle data (IV) 300 mm: @200 DAC 200 mm: @200 DAC ALICE Offline week - February 23, 2005

  27. 200 mm: Study of tilted angle data (V) Resolutions: 300 mm: ALICE Offline week - February 23, 2005

  28. Study of tilted angle data (VI) Resolutions: 200 mm sensor ALICE Offline week - February 23, 2005

  29. Study of tilted angle data (VI) Resolutions: 200 mm sensor, main topologies: cls 1 cls 2 cls 3 ALICE Offline week - February 23, 2005

  30. Study of tilted angle data (VI) Resolutions: 200 mm sensor, main topologies: cls 1 cls 2 cls 3 “Sensor thickness dependence of the ALICE SPD performance”, D. Elia et al., ready to be submitted as ALICE Internal Note ALICE Offline week - February 23, 2005

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