「光検出器 MPPC の 応答曲線の大量測定 A large amount of measurement of response...
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Transcript of 「光検出器 MPPC の 応答曲線の大量測定 A large amount of measurement of response...
「光検出器MPPCの応答曲線の大量測定
A large amount of measurement of response curve of photodetector
MPPC
University of tsukubaHiroko koike
筑波大学 6/18小池 博子 1
motivation
PMT ADC counts
MPPCP.E.
2
[0]*(1-exp(-1*(x-[1])/[2]))
y: ADC pulse height
x: rotation number of polarizing plate ( ×4.5 °)
Shape is sure to fall into disorder if mppc is a saturated condition.
The measuring method of the response curve is established.
PMTMPPC
responsecurve
Newsetup
3%penetration
10 ↓ 14.5
Laser controller
HVcurve
PMT HV( V)
PMTADCcounts
[0]*pow(x,[1])
Angle dependence in polarizing plate to laser
• y: ADC pulse height• x: rotation number of polarizing plate( ×4.5 °)
A flat area is seen in mppc plot. The saturated condition was able to be confirmed.
MPPC
PMT
51Response curve
ADC counts
Mppcp.e.
plan
• Evaluation of reproducibility by the same sample.1, Reproducibility of polarizing plate and laser.2, Reproducibility when mppc is pulled out and
opened.….
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