6/22/2015Tracker Week April 2002IEKP 1 Summary of IQC-workshop IEKP - Universität Karlsruhe (TH)

04/18/23 Tracker Week April 2002 IEKP 1

Summary of IQC-workshopSummary of IQC-workshop

IEKP - Universität Karlsruhe (TH)


YES


New facilitiy:New facilitiy:Isochroncyclotron in KarlsruheIsochroncyclotron in Karlsruhe

• 26 MeV protons

• Current 2 µA

(up to

40µA)

•Accessible within

~2 days

WE are the only user of this cyclotron


New INew Irradiation Arearradiation Area• Cooling with Nitrogen

gas down to -50°C• Initial positioning by

laser pointer• Scanning with 1mm

row steps (10cm/s)• Used proton current:

2 A• Irrad. of 120x120mm2

up to 1e14 p/cm2

takes 20min


Ongoing discussions everywhere Ongoing discussions everywhere


Rpoly after irradiationRpoly after irradiation

0V

1V

100V

No dependence on bias conditions !


CC after IrradiationCC after Irradiation0V 100V

1V No dependence on bias conditions !


Strip parameter ST teststructure Strip parameter ST teststructure calibration KA-Louvaincalibration 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 calibrationFuture calibration

• Second calibration run

• Calibration with an irradiated teststructure

• Anealing curve each 20 min @ 50°C, agreed with Louvain. IV & CV taken.


FINAL SET FINAL SET • All measurements after 80 min @ 60°C and > 6h in the fridge• All measurements @-10°C

• DIODE:– IV, CV (100kHz with guard on GND; (test also 1MHz))

I_TOT, V_dep, C_TOT, • Minisensor or full sensor

IV, CV (1kHz)

Strip measurements: all on 2 DC pads• Rpoly, Cint, Rint, leakage current

– Before irrad, full stripscan @ 400V– After irrad: 10 strips (later ~5) voltage (IQC) ramp 10V/s [10-500V]

For the beginning: full check for pinholes (Idiel@10V; CC (100Hz) without ramps all @ Vbias= 20V)

All Cap measure with parallel mode!


Preliminary Irrad tables Preliminary Irrad tables already exist in XMLalready exist in XML

• Tables are done and already underwent one iteration between Karlsruhe and Louvain; discussion with Didier done!

• The IQC tables will belong to the sensor ID=same object!!

• We will have 2 new composites with 3 simple tables: – 1. composite: diode minisensor

– 2. composite: sensor

– Tables show the results from:• [Rpoly;Cint;Ileak;Rint (CAC optional)]@Vstandard =400V

• ONE Ramp, values @Vbias=400V

• Delta of values before and after irradiation (

• Environment


Status of IQC-KarlsruheStatus of IQC-Karlsruhe

IEKP - Universität Karlsruhe (TH)


Stability of Beam CurrentStability of Beam Current

0 30 60 90 120 150 180 210 240 270 300 330 360 3900,25

0,30

0,35

0,40

0,45

0,50

0,55

0,60

C

urr

en

t [A

]

Time [s]


Verification of Fluence Verification of Fluence PredictionPrediction

1 2 3 40

1

2

3

4

5

6

7

8

9

Measurement No.

t

F

luen

ce [

1014

p/c

m2 ]

Ni foil dosimetry Prediction


Scan Area

Area of Interest

Autoradiography picture

Area cut for dosimetry

Homogeneity of ScanningHomogeneity of Scanning


Irradiation of HybridIrradiation of Hybrid

• During irradiation: Clock, Trigger (10Hz), Error Buffer Readout (1Hz), Reset

• Irradiation with 2A protons up to 2.7e14 p/cm² (30years LHC) at RT

• First qualification at cyclotron with 5m cables and provisional readout

• Hybrid is still activated (2µSv)• Result: Hybrid still alive


Picture of Hybrid on Ni foilPicture of Hybrid on Ni foil

Area cut for dosimetry

Hybrid


ST teststructures for irradiationST teststructures for irradiation

• #teststructures 5(+1), 4, 5 = 14• All 14 ST teststructures measured for VFlatBand • 6 ts measured for irradiation: IV, CV

all strips Rpoly, Cint, Idiel, Il, CC, Rint

• Finalizing of measurements: this week (incl. full sensor)

• Irradiation planned for next week


ST teststructure ParametersST teststructure Parameters

0 50 100 150 2001,2

1,4

Rpoly

Rp

oly

[M]

strip number

0 100 200 300 400 500 600-5,00E-009

0,00E+000

5,00E-009

1,00E-008

1,50E-008

2,00E-008

2,50E-008

3,00E-008

IV

To

tal C

urr

en

t [A

]

Voltage [V]0 50 100 150 200 250 300

0,00E+000

2,00E-009

4,00E-009

6,00E-009

CV

To

tal C

ap

aci

tan

ce [F

]

Voltage [V]

0 50 100 150 200

0,6

0,8

Interstrip capacitance (1 neighbour on DC pad)

Inte

rstr

ip C

apac

itanc

e [p

F]

Strip number


ST teststructure Parameters IIST teststructure Parameters II

0 50 100 150 20063,4

63,5

63,6

63,7

63,8

63,9

64,0

64,1

64,2

64,3

Coupling capacitance (LCR 100Hz)

Cou

plin

g ca

paci

tanc

e [p

F]

Strip number

Interstrip resistance >> 1G

0 50 100 150 2000,2

0,3

0,4

0,5

0,6

0,7

0,8

0,9

1,0

1,1

1,2

1,3

1,4

1,5

1,6

1,7

1,8

1,9

2,0

Leakage current

Leak

age

curr

ent [

nA]

strip number

0 50 100 150 2000,0000,0050,0100,0150,0200,0250,0300,0350,0400,0450,0500,0550,0600,0650,0700,0750,0800,0850,0900,0950,100

Current over dielectric @ 10V (pinholes)

Idie

l [nA

]

strip number

On 6 teststructures (1176 strips) we found only 2 lower CC (no pinholes)


Flatband voltagesFlatband voltages

Plus several from Wien, Florence and Strasburg with VFB of 5V, 35V, etc.

In addition we will measure the Cint for these structures!!

Flatbandvoltage

0,00E+00

1,00E-10

2,00E-10

3,00E-10

4,00E-10

5,00E-10

6,00E-10

7,00E-10

0 5 10 15 20 25 30

Capacitance [F]

Vo

lta

ge

[V

]

3021-0414308319

3021-0414735711

3021-0414735714

3021-0414735715

3021-0414735910

3021-0414739808

3021-0414842424

3021-0414842606

3021-0415060301

3021-0415060317

3021-0420275822

6/22/2015Tracker Week April 2002IEKP 1 Summary of IQC-workshop IEKP - Universität Karlsruhe (TH)

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Transcript of 6/22/2015Tracker Week April 2002IEKP 1 Summary of IQC-workshop IEKP - Universität Karlsruhe (TH)