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Final set of measurement for the irradiation quality assurance. What test do we need?. Not too extensive, to show difficult statistical fluctuactions. EFFICIENT. Sensitive to problems. Thorough to check all important parameters!. NON-AMBIGUOUS. - PowerPoint PPT Presentation
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Workshop on CMS irradiation sensor Qualification&Assurance
1
Final set of measurement for the irradiation quality assurance.
What test do we need?
EFFICIENT
NON-AMBIGUOUS
Sensitive to problems
Not too extensive, to show difficult statistical fluctuactions
Thorough to check all important parameters!
Thorough to check all important parameters! EFFICIENT
• All paramaters: V_dep, I_TOT, Strip Parameter
• But only on a subsample of strips
• All measurements in one measurement run (if possible)
• Strip measurement only on 2 DC pads!
10 20 30 40 50 60 705,00E-013
6,00E-013
7,00E-013
8,00E-013
9,00E-013
1,00E-012
normal measurement of Cint at DC-Pads with LCR at 1MHzAC-shorts between red strips
Inte
rstr
ip C
apac
itanc
e
strip number10 20 30 40 50 60 70
5,00E-013
6,00E-013
7,00E-013
8,00E-013
9,00E-013
1,00E-012normal measurement of Cint at AC-Pads with LCR at 1MHz
AC-shorts between red strips
Inte
rstr
ip C
apac
itanc
e
strip number
Not too extensive, to show difficult statistical fluctuactions or setup problems
• Problems with bonding or residuals of conductive rubber OR... could interfere with the measurement one strange result, even explainable by feature of the setup could possibly dis-qualify a complete batch of sensors
• e.g. CC @ conductive rubber remains:
0 20 40 60 80 100 120 140
20
40
60
80
100
120
Coupling Capacitance on TS H39
Before After irrad. and annealing
Co
ulp
ling
Ca
pa
cita
nce
[pF
]
ONLY sample of 10 strips! = FAST
Sensitive to problems RAMPSmore information of the strip paramter (here after irrad)
0 200 400 600 8001x106
2x106
3x106
4x106
5x106
6x106
7x106
Rpoly =U/INot corrected for leakage current
Rpoly
(O
hm
)
Voltage (V)
0 200 400 600 800
0,0
1,0x10-7
2,0x10-7
3,0x10-7
4,0x10-7
5,0x10-7
6,0x10-7
single strip leakage current
Leaka
ge c
urr
ent (A
)
Voltage (V)
0 200 400 600 800 10006,30E-013
6,32E-013
6,34E-013
6,36E-013
6,38E-013
6,40E-013
6,42E-013
6,44E-013
6,46E-013
6,48E-013
6,50E-013
Interstrip capacitanceOne neighbour
Cin
t (F
)
Voltage (V)
0 200 400 600 800 10001,00E-013
2,00E-013
3,00E-013
4,00E-013
5,00E-013
6,00E-013
7,00E-013
8,00E-013
9,00E-013
1,00E-012
1,10E-012
1,20E-012
1,30E-012
Before irrad (1MHz) Before irrad (100kHz) After irrad (1MHZ) After irrad (100kHZ)
Inte
rstr
ip C
ap
acita
nce
(F
)
Voltage (V)
Sensitive to problems RAMPSinterstrip resistance
0 100 200 300 400 500 600
1E-5
1E-4
1E-3
0,01
1E7
1E8
1E9
Interstrip resistance C5 MSE C6
Rin
t (O
hm)
// M
SE
Voltage (V) 0 10
1E-5
1E-4
1E-3
0,01
1E7
1E8
1E9
Interstrip resistance C5 MSE C6
Rin
t (O
hm)
// M
SE
Voltage (V)
Ke ith le y 6517 A
Sp a nnung sq ue lle
Ele ktro m e te r
+ -
Se nso rrüc kse ite
HP 661 4C
+
-
Calibration KA-LouvainIV & CV
-50 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 8500,00E+000
2,00E-010
4,00E-010
6,00E-010
8,00E-010
CV Karlsruhe CV Louvain
C_
TO
T (
F)
Voltage
0 100 200 300 400 500 6000,00E+000
2,00E-009
4,00E-009
6,00E-009
8,00E-009
1,00E-008
1,20E-008
1,40E-008
1,60E-008
1,80E-008
2,00E-008
IV Karlsruhe IV Louvain
To
tal l
ea
kag
e c
urr
en
t (A
)
Voltage (V)
KA: Offset due toAdd. 50pF (Iso-box)
Strip parameter ST teststructure calibration KA-Louvain
0 20 40 60 80 100 120 140100000
1000000
1E7
1E8
1E9
1E10
1E11
1E12
Interstrip Resistance ST teststructure
Inte
rstr
ip R
esis
tan
ce
Stripnumber
0 20 40 60 80 100 120 140
2,0x105
4,0x105
6,0x105
8,0x105
1,0x106
1,2x106
1,4x106
1,6x106
1,8x106
2,0x106
Rpoly Karlsruhe Rpoly Louvain
Rp
oly
(O
hm
)
Stripnumber
20 40 60 80 100 1208,00E-011
1,00E-010
Coupling capacity k595 Karlsruhe Coupling capacity LCR Karlsruhe Coupling capacity LCR Louvain
Co
up
ling
ca
pa
city (
F)
stripdata
Interstrip capacitance: KA 0.64pF (1 neighbour)Louvain 1.05pF (2 neighbours)
0 20 40 60 80 100 120 1404,00E-011
6,00E-011
8,00E-011
1,00E-010
1,20E-010
1,40E-010
1,60E-010
1,80E-010
2,00E-010
2,20E-010
2,40E-010
2,60E-010
2,80E-010
3,00E-010
Leakage current
Le
aka
ge
cu
rre
nt (A
)
Stripnumber
Future calibration
• Second calibration run
• Calibration with an irradiated teststructure
• Anealing curve as proposed by Alexander and and agreed with Louvain
FINAL SET proposal (to freeze)• All measurements after 80 min @ 60°C and > 6h in the fridge• All measurements @-10°C• DIODE:
– IV, CV (1MHz with guard on GND)
I_TOT, V_dep, C_TOT, • Minisensor or full sensor
IV, CV on diode (1kHz)
Strip measurements: all on 2 DC pads• Rpoly, Cint, Rint, leakage current
» for 10 strips » With a voltage ramp 1V/s [1-30V] 10V/s [40-600V]
For the beginning: full check for pinholes