Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 1 out of 23
Status update and Test results for Run2b Si sensors
at KSUSergey Korjenevski
Kansas State UniversityDec 12, 2002
SiDet, Fermilab
The Run 2b Silicon Tracker Workshop, Dec 12-13, 2002
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 2 out of 23
Outline
Stock Quality Tests status and results Irradiation studies status and
results
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 3 out of 23
Stock @ KSU – 12/11/02
ELMA prototypes: L0 35 detectors
7 first batch (February 2002) 16 second batch (July 2002) 12 third batch (November 2002)
L1 11 detectors 4 + mech First batch all at Fermilab 7 second batch (September 2002) 4 third batch (November 2002)
HPK prototypes: L1 4 detectors 3 test structures L2 10 detectors 5 test structures
Updated Stock#data#.xls at html://www.phys.ksu.edu/~skorj/Dzero
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 4 out of 23
Leakage Current Typical behavior example Breakdown
350V
0
100
200
300
400
500
600
700
800
900
1000
0 50 100 150 200 250 300 350 400 450Voltage (V)
Cu
rre
nt
(nA
)
L0 ELMA
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 5 out of 23
L0 ELMA
Depletion Voltage Example
• Most of the prototypes have depletion point at around 25V
1\C^2 vs Voltage
0
1000
2000
3000
4000
5000
6000
7000
0 5 10 15 20 25 30 35 40 45Voltage (V)
1/C
^2
(1
/pF
)^2
Vdep=23V
???
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 6 out of 23
L0 ELMA
Strip Measurements Strip Leakage current (random 9 sensors)
0
100
200
300
400
500
600
700
800
900
1000
0.001 0.01 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 10 100Current nA
Student?
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 7 out of 23
L0 ELMA
0
50
100
150
200
250
300
350
400
450
0 10 20 30 40 50 60 70 80 90 100 1000Capacitance pF
Strip Measurements Coupling capacitance @ 1kHz
Cp-Q mode
Cs-Rs mode
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 8 out of 23
L0 ELMA
Strip Measurements R poly
0
100
200
300
400
500
600
R KOhm
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 9 out of 23
L1 ELMA
Leakage Current Breakdown ~350V 08,10 – no Bkdn, 12 – 800V
0
100
200
300
400
500
600
0 100 200 300 400 500 600 700
Cu
rre
nt
(nA
)
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 10 out of 23
L1 ELMA
Depletion Voltage Example
• Most of the prototypes have depletion point at around 22V
0
500
1000
1500
2000
2500
0 20 40 60 80 100 120Voltage (V)
1/C
^2 (
1/p
F)^
2
Vdep=21V
???
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 11 out of 23
L1 ELMA
Strip Measurements Strip Leakage current
1
10
100
1000
10000
0 0.01 0.05 0.1 0.15 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 10 100Current nA
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 12 out of 23
L1 ELMA
Strip Measurements Coupling capacitance @ 1kHz and @ 100
Hz
1
10
100
1000
10000
0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230Cac pF
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 13 out of 23
L1 ELMA
Strip Measurements R poly
0
200
400
600
800
1000
1200
1400
500 600 700 800 900 1000 1100 1200 2000 3000 4000 10000R kOhm
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 14 out of 23
L1 HPK
0
10
20
30
40
50
60
70
80
90
100
0 200 400 600 800 1000Voltage (V)
Cu
rre
nt
(nA
)
Leakage Current Breakdown once
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 15 out of 23
L1 HPK
Depletion Voltage Easy to read
0
500
1000
1500
2000
2500
3000
0 50 100 150 200 250 300 350Voltage (V)
1/C
^2
(1
/pF
)^2
Vdep=118V
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 16 out of 23
L1 HPK
Strip Measurements Strip leakage
1
10
100
1000
10000
0.001 0.01 0.05 0.1 0.5 1 2 3nA
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 17 out of 23
L1 HPK
Strip Measurements Cac @ 1kHz Cp-Q mode
0
500
1000
1500
2000
2500
3000
20 40 60 80 100pF
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 18 out of 23
L1 HPK
Strip Measurements Rpoly Inconsistency
Polysilicon HPK 01
400
600
800
1000
1200
1400
1600
0 50 100 150 200 250 300 350Strip #
Re
sis
tan
ce
KO
hm
Rpoly at 5V
Rpoly at 2V
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 19 out of 23
HPK L2
Only one fully tested #052 Vdep = 101V at 21C Leakage 70 nA @ FDV No pinholes One leaky channel #317 Rpoly ~ 2.6 Mohm TOO HIGH!
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 20 out of 23
Irradiation
4 sensors -- 2 L0 2 L1 Run 3 next Friday Freezer to store sensors between Runs
-18C; 16%
Cold chuck installed, though not turned on yet.
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 21 out of 23
Irradiation
Preliminary: Current 0->1 1->2
L0_1-1d2 170 times 2.5 times L0_1-5d1 280 times 2.8 times L1-007ELM 800 times 1.7 times L1-020HPK 2200 times 1.6
times Depletion
L0_1-1d2 26 V -> 18 V -> 21 V L0_1-5d1 20 V -> 16 V -> 20 V L1-007ELM 21 V -> 18 V -> 22 V L1-020HPK 126 V -> 121 V -> 116 V
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 22 out of 23
ELMA Depletion Uncertainty
1\C^2 vs Voltage
0
1000
2000
3000
4000
5000
6000
0 5 10 15 20 25 30 35 40Voltage (V)
1/C
^2 (
1/p
F)^
2
Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 23 out of 23
Last Slide
QT stand Switch implementation should unify all
tests Input/Output format still an issue
Input file not really a problem Data Base is
Irradiation studies Cold chuck has to address high current Condensation may become a problem
All progress will be reported
