Results fromPhase I Pixel Upgrade Group
Matteo Centis Vignali, Malte Hoffmann, Tobias Lapsien,Stefan Mättig, Valentina Sola, Jennifer Sibille
UHH Detector Lab Meeting20th June 2013
UHH Detector Lab Meeting - 20/06/2013 2
Outline
V. Sola
Investigating Double Column Problem in psi46digV2 ✓ test beam ✓ x-ray CV Measurement on Diced Sensors
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Test Beam Set Up
V. Sola
CMS Tracker Week - 15/05/2013 4
psi46dig Pixel Read Out Chip
V. Sola
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DUT Yield vs Time
V. Sola
psi46digV2 chip 306 > IA = 30 mA > trim = 30 > 300s run > 780 Hz trigger
Cluster yield vs time > drop @ 240s - clock phase jump > small step @ 100s - ?
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DUT Hit Map
V. Sola
psi46digV2 chip 306 > IA = 30 mA > trim = 30 > 300s run > 780 Hz trigger
Raw pixel hit map > 2 double column die during the run
UHH Detector Lab Meeting - 20/06/2013 7
DUT Yield vs Space and Time
V. Sola
psi46digV2 chip 306 > IA = 30 mA > trim = 30 > 300s run > 780 Hz trigger
Rate per column vs time > 2 double column die during the run
Readout errors from other columns give fake entries
UHH Detector Lab Meeting - 20/06/2013 8
DUT Yield vs Space and Time
V. Sola
psi46 chip 205 > IA = 24 mA > trim = 30 > internal clock > 300s run > 780 Hz trigger
Rate per column vs time > 6 double column die simultaneously
NO readout errors with internal clockSeen in 14 over 240 runs
UHH Detector Lab Meeting - 20/06/2013 9
DUT Yield vs Space and Time
V. Sola
psi46digV2 chip 306 > IA = 30 mA > trim = 30 > external clock > 300s run > 780 Hz trigger
One hour run > 5 double column die
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DUT Efficiency
V. Sola
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Dead Double Columns
V. Sola
psi46digV2 chip 306 > 126 runs > 33,690s > 16.7M pixel his
99 dead DC in 56 runs
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Dead Double Columns
V. Sola
psi46digV2 chip 305 > 90 runs > 31,630s > 14.5M pixel his
60 dead DC in 37 runs
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x-ray Set Up
V. Sola
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x-ray Set Up
V. Sola
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Occupancy vs Time
V. Sola
psi46digV2 chip 305 > IA = 30 mA > trim = 50 > 600s > NO reset
NO dying DC observed
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Occupancy vs Time
V. Sola
psi46digV2 chip 305 > IA = 30 mA > trim = 50 > 600s > NO reset
recovering DC observed > ?
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Occupancy vs Time
V. Sola
psi46digV2 chip 305 > IA = 30 mA > trim = 50 > 600s > NO reset
???
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Grey Room Set Up
V. Sola
Temperature Sensor Picoammeter Bias Source LCR Meter
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Grey Room Set Up
V. Sola
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CV Measurement
V. Sola
After sensor dicing > depletion at ~ 80 V > step on the plateau still visible
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CV Measurement
V. Sola
After sensor dicing > depletion at ~ 80 V > step on the plateau still visible
Before dicing
CMS Tracker Week - 15/05/2013 22
Summary
V. Sola
Investigating psi46dig Double Column Issue = at test beam = with x-rays -> try to spot out some dependency
CV Measurement on Sensors = drop on the plateau still observed, even after dicing
UHH Detector Lab Meeting - 20/06/2013 23V. Sola
Backup
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Test Beam Set Up
V. Sola
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psi46dig Pixel Unit Cell
V. Sola
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psi46dig Periphery
V. Sola
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psi46dig Periphery
V. Sola
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Double Column Readout
V. Sola
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