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TIB module performance at X5 Test beam – preliminary studies

TIB module performance at X5 Test beam – preliminary studies. G.Segneri et al. Universita` and INFN - Pisa. Test Beam meeting – October 23 2003. Outline. Detector behavior under different bias voltages Studies on Detector Response Uniformity. Voltage scan for TIB Detectors.

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TIB module performance at X5 Test beam – preliminary studies

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  1. TIB module performance at X5 Test beam – preliminary studies G.Segneri et al. Universita` and INFN - Pisa Test Beam meeting – October 23 2003

  2. Outline • Detector behavior under different bias voltages • Studies on Detector Response Uniformity

  3. Voltage scan for TIB Detectors • Study of the detector properties (noise, charge, S/N, cluster width and response function) as a function of the applied voltage Used runs: TIB peak: 1198, 99, 1202, 03, 04, 14, 15 -120 GeV m TIB dec.: 30020, 24, 27, 33, 36, 39, 42, 46 – 120 GeV p, 25 ns beam

  4. Beam Position in TIB Modules pion beam muon beam

  5. TIB Voltage scan -peak • Peculiar behaviour at 300 V – hysteresis effect?

  6. TIB Voltage scan – peak (II)

  7. TIB Voltage scan – dec.

  8. TIB Voltage scan – dec. (II) • 20% increase in S/N ratio for Vbias = 2Vfd

  9. Response Function

  10. Cluster Shape Dec. mode Vbias=200V Peak mode Vbias=200V Peak mode Vbias=450V Dec. mode Vbias=450V

  11. TIB Voltage scan under controlled environmental conditions p beam Run numbers: T<23 oC: 30133, 37, 40, 42, 45, 47, 50 R.H.<20%: 30154, (62-66), (69-74) 120 GeV muon beam T<23 oC

  12. TIB Voltage scan under controlled environmental conditions (II) • Performance reproducible under controlled RH condition • signal and noise depend on RH but not their ratio

  13. Voltage Scan for TOB Detectors Used runs: 30145, 47, 51, 63, 64, 65 – 120 GeV m, 25 ns beam – deconvolution mode

  14. TOB mod # 8 TOB mod # 7 TOB mod # 9 TOB mod # 10 TOB mod # 11 TOB mod # 12

  15. TOB Voltage scan • Noise constant above 200 V • Charge collection improvement at very high voltage

  16. TOB module voltage scan (II) • 25% decrease in S/N for Vbias = Vfd

  17. TOB module voltage scan (III) • Less 10% of charge loss at Vbias/Vdepl>1.5 • Constant cluster width above Vbias=300 V

  18. Comparison TIB/TOB • 95% of S/N highest value at 1.7 (1.5) Vdepl for TOB (TIB) modules

  19. Sensor Uniformity Studies • Study of the TIB sensor properties (noise, charge, S/N, respone function) as a function of the cluster position Used runs: • Run 1351-3: peak mode, pion beam, approx. 500,000 events • Run 1484: dec mode, 25 ns pion beam, approx. 1,500,000 events

  20. Groups of 16 strips

  21. Groups of 8 strips Groups of 16 strips

  22. Conclusions • TIB and TOB modules behave as expected except in some runs to be understood • Dependence on RH to be investigated more deeply (next talk?) • Uniformity of detector performance as a function of the position was successfully tested in high statistics runs • Work still in progress…

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