11 saturation of mppc detector detector meeting 2010/11/18 m2 hiroko koike 090203_ikuno.ppt

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1 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

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Page 1: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

11

Saturation of MPPC detector

Detector   meeting2010/11/18

M2Hiroko Koike

090203_ikuno.ppt

Page 2: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

2

To solve theses problems..

MPPC

PMT

 GATE

MPPC

PMT

GATEAbove figure : quantities of light are the maximum.

Under figure :quantities of light are the maximum.

The fiber was concealed.

Page 3: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

gate

オシロスコープ

3

80nsec

60nsec

160nsec

120nsec

Page 4: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Response curve

4

赤・・・ 200nsec黄緑・・・ 160nsec青・・・ 120nsec黄色・・・ 80nsecピンク・・・ 60nsec

PMT ADC counts

MPPCp.e.

Page 5: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Response curve(gate=80nsec)

5

PMT ADC counts

MPPCp.e.

Fit function (the most simple function):  p0*( 1- exp (- p1 *x /p0 )) p0 : All numbers of expiration pixel p1 : Response ratio

Page 6: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Response curveQuotation from master's thesis of ikuno

My result of measurement is

p0=3087

P1=16.51

Page 7: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Fit function(crosstalk )gate=80nsec

7

Fit function (effect of crosstalk is additional ):  p0*( 1- exp (- p1 *x /p0 ))* ( 1+p2*exp (- p1 *x /p0 )) p0 : All numbers of expiration pixel p1 : Response ratio p2 : cross talk probability

Fit function (effect of crosstalk is additional ):  p0*( 1- exp (- p1 *x /p0 ))* ( 1+0.07252*exp (- p1 *x /p0 )) p0 : All numbers of expiration pixel p1 : Response ratio p2 : cross talk probability

MPPCp.e.

MPPCp.e.

PMT ADC counts PMT ADC counts

Page 8: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Fit function(crosstalk and after pulse )gate=80nsec

8

MPPCp.e. MPPC

p.e.

PMT ADC countsPMT ADC counts

Fit function (effect of crosstalk and afterpulse is additional ):  p0*( 1- exp (- p1 *x /p0 ))* ( 1+p2*exp (- p1 *x /p0 )) *(1+p3) p0 : All numbers of expiration pixel p1 : Response ratio p2 : cross talk probability p3 : after pulse

Fit function (effect of crosstalk and afterpulse is additional ):  p0*( 1- exp (- p1 *x /p0 ))* ( 1+0.07252*exp (- p1 *x /p0 )) *(1+0.03) p0 : All numbers of expiration pixel p1 : Response ratio p2 : cross talk probability p3 : after pulse

Page 9: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

plan• Improvement of the fit function About measurement of response curve of source

of light with laser+ scinti + WLS• Evaluation of evaluation • individual difference of reproducibility・・・・ Match of fiber and scintillator /// I want to finish taking it by the end of this

year. • Evaluation of responsiveness curve by simulation

・・・ making it now.9

Page 10: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

1010

• Back up

Page 11: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

1111

Plan ( last time )A receiving optical side was expanded more  

than before.

12mm

MPPC

PMT

GATE

The setup has not changed.

Page 12: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

12

When quantities of light are the maximum

MPPC

signal

MPPC

pedestal

PMT

signal

PMT

pedestal

Page 13: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

13

When quantities of light are the minimum

MPPC

signal

PMT

signal

MPPC

pedestal

PMT

pedestal

13

Page 14: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

14

Angle dependence of polarizing plate to laser

y :  ADC   pulse heightx : rotation step of polarizer (°)

Shape of MPPC looks like obviously thinner   than PMT .

MPPCPMT

Page 15: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

response curve

15

PMT ADC counts

MPPCp.e.

Fit function (the most simple function):  p0*( 1- exp (- p1 *x /p0 )) p0 : All numbers of expiration pixel p1 : Response ratio

Page 16: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

16

Fit function(crosstalk )

Fit function (effect of crosstalk is additional ):  p0*( 1- exp (- p1 *x /p0 ))* ( 1+p2*exp (- p1 *x /p0 )) p0 : All numbers of expiration pixel p1 : Response ratio p2 : cross talk probability

PMT ADC counts PMT ADC counts

MPPCp.e.

MPPCp.e.

Fit function (effect of crosstalk is additional ):  p0*( 1- exp (- p1 *x /p0 ))* ( 1+0.07252*exp (- p1 *x /p0 )) p0 : All numbers of expiration pixel p1 : Response ratio p2 : cross talk probability

Page 17: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Crosstalk and after pulse

17

Fit function (effect of crosstalk and afterpulse is additional ):  p0*( 1- exp (- p1 *x /p0 ))* ( 1+p2*exp (- p1 *x /p0 )) *(1+p3) p0 : All numbers of expiration pixel p1 : Response ratio p2 : cross talk probability p3 : after pulse

Fit function (effect of crosstalk and afterpulse is additional ):  p0*( 1- exp (- p1 *x /p0 ))* ( 1+0.07252*exp (- p1 *x /p0 )) *(1+0.03) p0 : All numbers of expiration pixel p1 : Response ratio p2 : cross talk probability p3 : after pulse

MPPCp.e.

MPPCp.e.

PMT ADC counts PMT ADC counts

Page 18: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

18

Angle dependence of polarizing plate to laserGate(200nsec)

y :  ADC   pulse heightx : rotation step of polarizer (°)

Shape of MPPC looks like obviously thinner   than PMT .

MPPCPMT

Page 19: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Gate(160nsec)

19

PMTMPPC

Page 20: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Gate(120nsec)

20

PMTMPPC

Page 21: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Gate(80nsec)

21

PMT MPPC

Page 22: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Gate(60nsec)

22

MPPCPMT

Page 23: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Response curve(gate=160nsec)

23

Page 24: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Response curve(gate=120nsec)

24

Page 25: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

Response curve(gate=60nsec)

25

Page 26: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

• Backup 前々回

26

Page 27: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

2727

Gain•   dのグラフと gain のグラフ

Over +3V=72.44VGain (over +3V)=3.5 ×105

d=13.7 counts

d=14.1 counts

72.4V

'

'

)(.

d

ADCcountsdep

Ae

SdGain

The value of gain is given as a parameter in the program.

Page 28: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

2828

When quantities of light are the maximum

MPPC

signal

PMT

signal

PMT

pedestal

MPPC

pedestal

Page 29: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

2929

response curve(last time)

Fit function (the most simple function):  p0*( 1- exp (- p1 *x /p0 )) p0 : All numbers of expiration pixel p1 : Response ratio

PMT ADC counts

MPPCp.e. Accuracy of a

fit is not good.

Page 30: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

3030

MPPC 応答曲線 ( 生野先輩  2009/02/03 ILC meeting より引用 )

Page 31: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

3131

MPPC 応答曲線 ( 生野先輩  2009/02/03 ILC meeting より引用 )

Npix=2424 ± 3 と求まった。

Page 32: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

3232

問題点2について   ( 生野先輩  2009/0 1 /23 ILC meeting より引用 )

テスト @ 筑波大

シンチの光ファイバー

直接紫外光

レーザー

MPPC

Inside

Laser+ シンチレータのシステムテスト(まだ光量変えられない)

ビームテストと同じストリップ

Page 33: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

3333

Page 34: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

3434

Measuring imitative chartMPPC 単体

    

20mm

MPPC +scintillator

30mm

Page 35: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

3535

前回

PMT side

To bring the distance of the scintillator and the polarizing plate, the fiber was lengthened.

MPPC

side

Page 36: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

3636

Setup

180mm10mm

MPPC

PMT

GATE

Signal of PMT and MPPCWhen seeing with the oscilloscope

The fiber was extended.

Page 37: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

37 37

When quantities of light are the minimum( 前回 )

MPPC

signal

MPPC

pedestal

PMT

pedestal

PMT

signal

Page 38: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

3838

Angle dependence of polarizing plate to laser

PMT MPPC

y :  ADC   pulse heightx : rotation step of polarizer (°)Shape of MPPC looks obviously thinner  than PMT .

Page 39: 11 Saturation of MPPC detector Detector meeting 2010/11/18 M2 Hiroko Koike 090203_ikuno.ppt

3939

Response Curve (前々回)

Fit function (the most simple function):  p0*( 1- exp (- p1 *x /p0 )) p0 : All numbers of expiration pixel p1 : Response ratio

PMT ADC counts

MPPCp.e.