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.

30 30

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

10cm_detector#2MPV 867.1

10cm_detector#1MPV 495.9

P1

P2

P3

10cm_detector#2MPV 864.4

10cm_detector#1MPV 411.9

10cm_detector#2MPV 715.5

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.

P1

P2

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10cm_detector#1MPV 816.6

10cm_detector#2MPV 871.2

10cm_detector#1MPV 767

P1

P2

P3

10cm_detector#2MPV 776.8

10cm_detector#1MPV 813.4

10cm_detector#2MPV 808.9

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!