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SLHC Sensors at Meson Test
Ryan RiveraESE/CD, Fermilab
All-Experimenter’s Meeting April 19, 2010
2
Motivation
• Goal is to test future CMS vertex detector prototypes:– Diamond sensors– 3D sensors– MCz planar silicon sensors
• We compare against the current CMS silicon detector standard:– The telescope is made of grade B modules
rejected during CMS pixel production.
3
Since Fall 2009…
• Integrated the analysis software into telescope package.
• Expanded the telescope by doubling station count.
• Built a new modular mechanical box that hosts the detectors and electronics.
• Collaborated with universities interested in applicable sensors.
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Telescope Overview
CONTROL ROOM
TELESCOPE ENCLOSURE
BEAM
FERMILAB NETWORK
DUT PIXEL PLANESCINTILLATORS
3.7V POWER SUPPLY
ACCELERATOR CLOCK
CLOCK AND TRIGGER
DISTRIBUTION
GIGABIT ETHERNET LOCAL
NETWORKGIGABIT
ETHERNET FERMI NETWORK
5
Telescope Overview Cont.
CAPTAN STACK POWER SUPPLY DUT SENSOR BIASTELESCOPE BOX
ROUTERSCINTILLATOR
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Telescope Overview Cont.
CAPTAN STACK
DUT
PIXEL DETECTOR
PIXEL DETECTOR
SCINTILLATOR
TRACKING STATION
BASIC CELL
7
Telescope Overview Cont.Mechanical cell
Mechanical support for the plaquette
Plaquette
CAPTAN Stack
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Telescope Silicon Detector
2cm4cm
2x4 Plaquette
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Diamond Detector
Active Area
10
3D Detector
1cm
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Telescope Results from a 20-min Run
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Analysis
• 197,692 events
0 1 2 3 4 5 6 70.0
1.0
2.0
3.0
4.0
5.0
6.0
0 1 2 3 4 5 6 70.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
1 Cluster2 ClusterUnclustered
Hits/Event
Clusters/Event
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Analysis – Beam Spot
2 13 0
7 46 5
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Alignment
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Tracking
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Tracking Cont.
• 95,930 tracks from 197,692 events.• 48.5 % efficiency.
0 1 2 3 4 5 6 70.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
1 Cluster2 Cluster
Clusters/Track
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Residuals
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.50
5
10
15
20
25
30
35
Res XRes Y
Residual vs. Efficiency
Efficiency
Avg.
Res
idua
l [m
icro
ns]
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Charge Distribution
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Charge Distribution Cont.
Diamond Sensor Charge Sharing vs. HV
Number of Columns per Cluster
Number of Rows per Cluster
HV = -250 V
Sensor rotated to ~ 20 in row direction. More charge collected with higher bias HV till saturation. Need more work on gain calibration to extract the absolute
charge (MPV of Landau distribution).
04/18/10 Jianchun Wang 20
Preliminary
Diamond Sensor Residual Center vs. HV
Tracks are at ~ 20 with respect to normal of sensor plane in row direction. Use the same set of telescope spatial configuration parameters. With low bias HV, charges generated near readout electronics can be collected,
equivalent to thinner effective sensor. Thus the residual center shifts. The maximum possible shift ~ tan(q)*d/2 ~ 90 mm.
04/18/10 Jianchun Wang 21
Preliminary
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3D Results
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Future Plans
• Analyze data from 3D sensors.• Augment telescope with higher resolution
planes – possibly strips or CCDs.• Improve charge resolution and analog stability
by adding amplifiers.• Continue to improve usability of telescope
software package.
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Future Plans – Parallel Processing
• Alignment and Reconstruction done in Real-Time.
• Integrate with xTCA.• Explore CUDA and
compare results.
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Contributors
S. KwanA. ProsserL. UpleggerJ. AndresenJ. ChramowiczA. KumarP. TanJ. Wang (Syracuse)M. Artuso (Syracuse)
I. OsipenkovA. TodriC. LeiS. BoseZ. WanA. ZatserklyaniyJ. YunE. Alagoz (Purdue)O. Koybasi (Purdue)