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FNAL Beam test results

This report summarizes the results from recent beam testing conducted on CMS zigzag and 10 cm zigzag detectors, focusing on key metrics such as beam profiles, noise levels, charge distributions, and position uniformity. Significant findings include charge distributions, noise and offset characterizations, and variations in detector response under different high voltage settings. While positive results were obtained, further improvements in delta_y plots and a comprehensive data analysis are necessary for precise resolution of the zigzag detectors. Future steps involve implementing tracking functions for enhanced analysis.

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FNAL Beam test results

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  1. FNAL Beam test results A. Zhang, V. Bhopatkar, M. Phipps, J. Twigger, M. Hohlmann HEP Group A, Florida Tech 2013/11/18

  2. Results to be shown • Beam profiles of2D trackers • Noises and Offsets • CMS zigzag and 10cm zigzag detectors • Charge distributions; • Position scan (uniformity); • HV scan (‘gain’) • Delta_y distribution of 10cm zz.

  3. Beam Profiles _ Hit Map 20GeV: X_6cm, Y_3cm

  4. Beam Profiles _ Hit Map 32GeV: X_6cm, Y_3cm

  5. Beam Profiles _ Cluster Charge Map 20GeV: X_6cm, Y_3cm

  6. Beam Profiles _ Cluster Charge Map 32GeV: X_6cm, Y_2cm 6

  7. Noises CMS ZZ APV Noises less than 10 ADC channels, Offsets around 1400-1500 ADC channels. Offsets

  8. 30 30 Two 10cm zigzag detectors’ APV noises and offsets. Each detector uses 30 channels of a APV.

  9. Cluster charge distribution of CMSZZ eta5 Peak charge distribution Most of the signals’ max. happen in the 3rd of the 9 time windows. Strips occupancy Consistent with beam profiles from 2D trackers

  10. 2 points / 7 sectors of CMS zz detector were tested (HV 3200V). Maximum charge difference percentage is about 50%, ie., the uniformity is about 25%. Charge of the signal is around 10fC. (gain of APV is 232e/ADC)

  11. 10cm ZZ: 3/2/2/2 CMSZZ: 3/1/2/1 HV scan of CMSZZ and 10cm ZZ detectors. Charge is between 3 and 90 fC. Charge in 10cm detector is a little higher than in CMS, because of larger gas gap.

  12. Sigma 355μm Resolution ~ Sigma 0.118 strips Resolution ~ Delta_Y distribution from 10cm Zigzag 30 channels @10deg, HV 4050V With cut conditions by cluster charge and cluster size

  13. Sigma 380μm Resolution ~ Sigma 0.108 strips Resolution ~ Delta_Y distribution from 10cm Zigzag 30 channels @20deg ,HV 4050V With cut conditions by cluster charge and cluster size

  14. P1 10cm_detector#1 MPV 538.1 10cm_detector#2 MPV 867.1 P2 10cm_detector#1 MPV 495.9 10cm_detector#2 MPV 864.4 P3 10cm_detector#1 MPV 411.9 10cm_detector#2 MPV 715.5 Charge distributions of 10cm zz 30 channels at 20deg position, HV 4050V

  15. P1 P2 10cm zz48 channels at 0 deg, HV 4000V, delta_y distributions at 2 points.

  16. P1 10cm_detector#2 MPV 871.2 10cm_detector#1 MPV 816.6 P2 10cm_detector#1 MPV 767 10cm_detector#2 MPV 776.8 P3 10cm_detector#1 MPV 813.4 10cm_detector#2 MPV 808.9 16 Charge distributions of 10cm zz48 channels at 0deg position, HV 4000V

  17. Summary • We are getting positive results, eg., beam profiles, cluster charge spectra, charge vs HV, position uniformity etc., and more plots will come out. • Still need to improve delta_y plots, so to get more precise resolution of zigzag detectors. And to compare results of different angles for 10cm zigzag detectors. • We will start full data analysis process soon, so that we will get a first chance to look at all results together. • Tracking function of the detector systems needs to be implemented, which is the most important step for analyzing on the road.

  18. Summary • We are getting positive results, eg., beam profiles, cluster charge spectra, charge vs HV, position uniformity etc., and more plots will come out. • Still need to improve delta_y plots, so to get more precise resolution of zigzag detectors. And to compare results of different angles for 10cm zigzag detectors. • We will start full data analysis process soon, so that we will get a first chance to look at all results together. • Tracking function of the detector systems needs to be implemented, which is the most important step for analyzing on the road. Thanks!

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