fnal beam test results a. zhang, v. bhopatkar, m. phipps, j. twigger, m. hohlmann hep group a,...

FNAL Beam test results

A. Zhang, V. Bhopatkar, M. Phipps, J. Twigger, M. Hohlmann

HEP Group A, Florida Tech2013/11/18

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Results to be shown

• Beam profiles of 2D trackers• Noises and Offsets• CMS zigzag and 10cm zigzag detectorsCharge distributions; Position scan (uniformity); HV scan (‘gain’)Delta_y distribution of 10cm zz.

Beam Profiles _ Hit Map

20GeV: X_6cm, Y_3cm

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Beam Profiles _ Hit Map

32GeV: X_6cm, Y_3cm

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20GeV: X_6cm, Y_3cm

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Beam Profiles _ Cluster Charge Map

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Beam Profiles _ Cluster Charge Map

32GeV: X_6cm, Y_2cm

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

Noises

Offsets

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

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Cluster charge distribution of CMSZZ eta5

Strips occupancyConsistent with beam profiles from 2D trackers

Most of the signals’ max. happen in the 3rd of the 9 time windows.

Peak charge distribution

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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)

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CMSZZ: 3/1/2/1 10cm ZZ: 3/2/2/2

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.

12Delta_Y distribution from 10cm Zigzag 30 channels @10deg, HV 4050VWith cut conditions by cluster charge and cluster size

Sigma 355μmResolution ~

Sigma 0.118 stripsResolution ~

13Delta_Y distribution from 10cm Zigzag 30 channels @20deg ,HV 4050VWith cut conditions by cluster charge and cluster size

Sigma 380μmResolution ~

Sigma 0.108 stripsResolution ~

10cm_detector#1MPV 538.1



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Charge distributions of 10cm zz 30 channels at 20deg position, HV 4050V 14

1510cm zz 48 channels at 0 deg, HV 4000V, delta_y distributions at 2 points.

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P2

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10cm_detector#1MPV 767

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Charge distributions of 10cm zz 48 channels at 0deg position, HV 4000V 16

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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.

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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!

fnal beam test results a. zhang, v. bhopatkar, m. phipps, j. twigger, m. hohlmann hep group a,...

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