sergey korjenevski ksu the run iib silicon tracker workshop, dec 12-13, 2002 1 out of 23 status...
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![Page 1: 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 KSU Sergey](https://reader030.vdocuments.us/reader030/viewer/2022032804/56649e4a5503460f94b3efdb/html5/thumbnails/1.jpg)
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
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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
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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
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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
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0 50 100 150 200 250 300 350 400 450Voltage (V)
Cu
rre
nt
(nA
)
L0 ELMA
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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
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3000
4000
5000
6000
7000
0 5 10 15 20 25 30 35 40 45Voltage (V)
1/C
^2
(1
/pF
)^2
Vdep=23V
???
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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
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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?
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Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 7 out of 23
L0 ELMA
0
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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
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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
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600
R KOhm
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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
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300
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500
600
0 100 200 300 400 500 600 700
Cu
rre
nt
(nA
)
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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
???
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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
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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
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Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 13 out of 23
L1 ELMA
Strip Measurements R poly
0
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400
600
800
1000
1200
1400
500 600 700 800 900 1000 1100 1200 2000 3000 4000 10000R kOhm
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Sergey Korjenevski KSU The Run IIb Silicon Tracker Workshop, Dec 12-13, 2002 14 out of 23
L1 HPK
0
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0 200 400 600 800 1000Voltage (V)
Cu
rre
nt
(nA
)
Leakage Current Breakdown once
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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
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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
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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
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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
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1000
1200
1400
1600
0 50 100 150 200 250 300 350Strip #
Re
sis
tan
ce
KO
hm
Rpoly at 5V
Rpoly at 2V
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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!
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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.
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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
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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
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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