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MuTr HV Optimization

MuTr HV Optimization. RIKEN/RBRC Itaru Nakagawa. Goal. Find out HV to achieve Noise RMS/MIP peak (N/S) = 1%. Gain can be similar to chambers, but noise distributions are unique from chamber to chamber.

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MuTr HV Optimization

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  1. MuTr HV Optimization RIKEN/RBRC Itaru Nakagawa

  2. Goal • Find out HV to achieve Noise RMS/MIP peak (N/S) = 1%. • Gain can be similar to chambers, but noise distributions are unique from chamber to chamber. • Historically MuTR has been operated with only three HV settings (St1=1875V, St2=1900V, St3=1925V) • Vary HV channel by channel basis to set N/S ~ 1%.

  3. Cosmic Data Taking • Dedicated Measurements : Dec.23 ~ Jan. 11 • MuIDLL1 N1D||S1D trigger : 60Hz ~ 120Hz • Work area: phnxmutr@va020:/data2/SubSystems/phnxmutr/itaru/MipAna • README for instruction Event Selection: Peak Strip ADC of Cluster. No track required.

  4. North Arm

  5. Station-1 Gap-1 Gap-3 Gap-2 Oct.1 Oct.2 Oct.3 Oct.4 Oct.5 Oct.6 Oct.7 Oct.8

  6. Station-2 Gap-1 Gap-3 Gap-2 Oct.1 Oct.2 Oct.3 Oct.4 Oct.5 Oct.6 Oct.7 Oct.8

  7. Station-3 Gap-1 Gap-2 Oct.1 Oct.2 Oct.3 Oct.4 Oct.5 Oct.6 Oct.7 Oct.8

  8. MIP Peak Positions @ Nominal HV oct1 oct2 oct4 oct6 St-1 oct3 oct5 oct7 oct8 gap1 gap2 gap3 St-2 St-3

  9. Pedestal RMS (North Station-1)

  10. Plane Averaged Pedestal RMS [ch] oct1 St-1 oct2 oct4 oct6 oct3 oct5 oct7 oct8 St-2 St-3

  11. Noise RMS/MIP Peak @ Nominal HV St-1 St-2 St-3

  12. N/S .vs Operation Voltage +30V +50V Linear Fit +15V nominal St-1 N/S : 2% -> 1% Needs additional 110V -30V Nominal + Additional Voltage [V] St-2 St-3 Noise RMS / MIP Peak ADC [%]

  13. N/S~1% Required Voltage : Nominal + ?V +50V limit St-1 St-2, St-3 planes are averaged over common HV chain St-2 St-3

  14. South Arm

  15. Station-1 Gap-1 Gap-3 Gap-2 Oct.1 Oct.2 Oct.3 Oct.4 Oct.5 Oct.6 Oct.7 Oct.8

  16. Station-2 Gap-1 Gap-3 Gap-2 Oct.1 Oct.2 Oct.3 Oct.4 Oct.5 Oct.6 Oct.7 Oct.8

  17. Station-3 Gap-1 Gap-2 Oct.1 Oct.2 Oct.3 Oct.4 Oct.5 Oct.6 Oct.7 Oct.8

  18. MIP Peak Positions @ Nominal HV oct1 oct2 oct4 oct6 St-1 oct3 oct5 oct7 oct8 gap1 gap2 gap3 St-2 St-3

  19. Plane Averaged Pedestal RMS oct1 St-1 oct2 oct4 oct6 oct3 oct5 oct7 oct8 St-2 St-3

  20. Noise RMS/MIP Peak @ Nominal HV St-1 St-2 St-3

  21. N/S .vs Operation Voltage +30V +50V +15V Linear Fit nominal St-1 -30V Nominal + Additional Voltage [V] St-2 St-3 Noise RMS / MIP Peak ADC [%]

  22. N/S~1% Suggested Voltage : Nominal + ?V St-1 St-2 St-3

  23. HV Configuration File Copy & paste phoncs@va011:~/hv_stuff/ hvcontrol_MutrN(S)

  24. Study From Run9

  25. HV Set to be N/S ~ 1.5% (North)

  26. Cosmic vs Beam (Absolute)

  27. SN vs HV (North) +50V +25V nominal

  28. Conclusion • MuTr Gain .vs HV were evaluated using HV scan data with cosmic • HVs are optimized to set N/S to be 1%. • New HV will be configured soon. • Will confirm N/S really comes as it desired with further data taking. • Need to confirm with beam data as well.

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