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

UHH Detector Lab Meeting - 20/06/2013 3

Test Beam Set Up

V. Sola

CMS Tracker Week - 15/05/2013 4

psi46dig Pixel Read Out Chip

V. Sola

UHH Detector Lab Meeting - 20/06/2013 5

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 - ?

UHH Detector Lab Meeting - 20/06/2013 6

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

UHH Detector Lab Meeting - 20/06/2013 10

DUT Efficiency

V. Sola

UHH Detector Lab Meeting - 20/06/2013 11

Dead Double Columns

V. Sola

psi46digV2 chip 306 > 126 runs > 33,690s > 16.7M pixel his

99 dead DC in 56 runs

UHH Detector Lab Meeting - 20/06/2013 12

Dead Double Columns

V. Sola

psi46digV2 chip 305 > 90 runs > 31,630s > 14.5M pixel his

60 dead DC in 37 runs

UHH Detector Lab Meeting - 20/06/2013 13

x-ray Set Up

V. Sola

UHH Detector Lab Meeting - 20/06/2013 14

x-ray Set Up

V. Sola

UHH Detector Lab Meeting - 20/06/2013 15

Occupancy vs Time

V. Sola

psi46digV2 chip 305 > IA = 30 mA > trim = 50 > 600s > NO reset

NO dying DC observed

UHH Detector Lab Meeting - 20/06/2013 16

Occupancy vs Time

V. Sola

psi46digV2 chip 305 > IA = 30 mA > trim = 50 > 600s > NO reset

recovering DC observed > ?

UHH Detector Lab Meeting - 20/06/2013 17

Occupancy vs Time

V. Sola

psi46digV2 chip 305 > IA = 30 mA > trim = 50 > 600s > NO reset

???

UHH Detector Lab Meeting - 20/06/2013 18

Grey Room Set Up

V. Sola

Temperature Sensor Picoammeter Bias Source LCR Meter

UHH Detector Lab Meeting - 20/06/2013 19

Grey Room Set Up

V. Sola

UHH Detector Lab Meeting - 20/06/2013 20

CV Measurement

V. Sola

After sensor dicing > depletion at ~ 80 V > step on the plateau still visible

UHH Detector Lab Meeting - 20/06/2013 21

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

UHH Detector Lab Meeting - 20/06/2013 24

Test Beam Set Up

V. Sola

UHH Detector Lab Meeting - 20/06/2013 25

psi46dig Pixel Unit Cell

V. Sola

UHH Detector Lab Meeting - 20/06/2013 26

psi46dig Periphery

V. Sola

UHH Detector Lab Meeting - 20/06/2013 27

psi46dig Periphery

V. Sola

UHH Detector Lab Meeting - 20/06/2013 28

Double Column Readout

V. Sola