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MPPC 中性子照射実験 PowerPoint PPT Presentation


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MPPC 中性子照射実験. 検出器ミーティング 山崎秀樹 生野利典. Dose rate. Flux = 1.5×10 9 neutron/cm 2 /Wh (W = watt, h = hour) …… calculated MCNP ( Monte Carlo Neutron and Photon Transport Code System ) Code. 4 dose rate patterns                      ↓

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MPPC 中性子照射実験

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Mppc

MPPC


Dose rate

Dose rate

Flux = 1.5109 neutron/cm2/Wh (W = watt, h = hour)

calculated MCNPMonte Carlo Neutron

and Photon Transport Code System Code

4 dose rate patterns

1.5109 neutron/cm2 /Wh12.5/60 h1W =3.125108 neutron/cm2

1.5109 neutron/cm2 /Wh12.5/60 h10W =3.125109 neutron/cm2

1.5109 neutron/cm2 /Wh12.5/60 h100W =3.1251010 neutron/cm2

1.5109 neutron/cm2 /Wh12.5/60 h1kW=3.1251011 neutron/cm2


Mppc

()

  • Gain,NoiseRate

  • I-V Curve

  • After Pulse

  • P.D.E(Photon Detection Efficiency)


Mppc

Leakage Current

108/cm2 ,09/cm2,1010/cm2 ,011/cm2

Leakage Currentlog [-A]

Leakage Current [-A]

Vbias [-V]

Vbias [-V]

108/cm2 ()

109/cm2 ()

1010/cm2 ()

1011/cm2 ()

108/cm2 ()

109/cm2 ()

1010/cm2 ()

1011/cm2 ()


Mppc

Leakage Current

in

Current

out

MPPC

47k

47k

0.47F

10k

0.1F

0.1F

Leakage Current= 104K

MPPC=

Gain Plot


Mppc

Gain()

10n/cm2

109 n/cm2

1010 n/cm2

1011 n/cm2

Reference

2~5


Mppc

Gain()

108 n/cm2

109 n/cm2

1010 n/cm2

1010 n/cm2Fitting

2

plot


Mppc

Gain()

Reference

108 n/cm2

11/14

11/15

12/05 60

12/05 60

12/15

12/26

109 n/cm2


Break down voltage v0

Break Down Voltage (V0)

10n/cm2

109 n/cm2

Reference

1 11/14 2 11/15

3 12/05 60 4 12/05 60

5 2/15 6 12/26

V0


Capacitance

Capacitance

10n/cm2

109 n/cm2

Reference

Capacitance??

1 11/14 2 11/15

3 12/05 60 4 12/05 60

5 2/15 6 12/26


Mppc

NoiseRate, Crosstalk

108/cm2

109/cm2

1010/cm2

1011/cm2

NoiseRate [Hz]

Crosstalk Probability

Vbias [-V]

Vbias [-V]

NoiseRate(>1.5p.e.) [Hz]

Vbias [-V]

NoiseRate, Crosstalk


Mppc

NoiseRate, Crosstalk(Over V)

108/cm2

109/cm2

1010/cm2

1011/cm2

NoiseRate [Hz]

Crosstalk Probability

Over V[-V]

Over V [-V]

NoiseRate(>1.5p.e.) [Hz]

Over V [-V]

NoiseRate, Crosstalk


Mppc

Threshold Curve

109/cm2

1010/cm2

1011/cm2

109/cm20.5pe,1.5peThr.

108/cm2


Mppc

Threshold Curve(semi-log)

108/cm2

109/cm2

1010/cm2

1011/cm2

109/cm20.5pe,1.5peThr.


Mppc

NoiseRate

108/cm2 ()

108/cm2 ()

108/cm2 ()

108/cm2 ()

108/cm2 ()

109/cm2 ()

108/cm2 ()

109/cm2 ()

NoiseRate

Crosstalk

108/cm2 ,09/cm2

NoiseRate, Crosstalk Probability

NoiseRate [Hz]

Crosstalk Probability

Vbias [-V]

Vbias [-V]

NoiseRate(>1.5p.e.) [Hz]

Vbias [-V]


Mppc

NoiseRateOverV

108/cm2 ()

108/cm2 ()

108/cm2 ()

108/cm2 ()

108/cm2 ()

109/cm2 ()

108/cm2 ()

109/cm2 ()

NoiseRate

Crosstalk

108/cm2 ,09/cm2

NoiseRate, Crosstalk Probability

NoiseRate [Hz]

Crosstalk Probability

Over V [-V]

Over V [-V]

NoiseRate(>1.5p.e.) [Hz]

Over V [-V]


Mppc

NoiseRate

0 2007.11.14

1 2007.11.16

2 2007.12.05 60

3 2007.12.05 60

4 2007.12.15

5 2007.12.26

108/cm2

Vbias=-77.5V

108/cm2

109/cm2

109/cm2

Vbias=-77.5V

NoiseRate [Hz]

NoiseRate[Hz]

NoiseRate

Ref.


Mppc

Leakage Current

0 11.14

1 11.16

2 12.05

3 12.05

4 12.15

5 12.26

Vbias=-75.5V

108/cm2

109/cm2

Leakage Current [-A]

Leakage Current [-A]

1010/cm2

1011/cm2

Leakage Current [-A]

Leakage Current [-A]


Mppc

  • Gain

  • NoiseRateCross-talk

  • Leakgae Currnet

After Pulse

P.D.E


Mppc

BackUp


Mppc

NoiseRate

()

0 2007.11.14

1 2007.11.16

2 2007.12.05 60

3 2007.12.05 60

4 2007.12.15

5 2007.12.15

6 2007.12.26

7 2008.01.12

8 2008.01.12()

Ref. V= -77.5V

NoiseRate [Hz]

Ref.

Ref.0 2007.11.14

5

NoiseRate [Hz]

V=108/cm2-77.5V


Mppc

Leakage Current

Leakage Current [-A]

Vbias [-V]


Mppc

0 11.14

1 11.16

2 12.05

3 12.05

4 12.15

5 12.26

Ref. Leakage Current

Ref. V= -77.5V

Leakage Current [-A]


Mppc

Reference

20ns

200mV

1011 n/cm2


Mppc

Reference

100mV

1010 n/cm2


Mppc

Reference

100mV

109 n/cm2


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