Transcript 光検出器MPPCの 応答曲線の大量測定 A large amount of

「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 tsukuba
筑波大学 6/3
小池 博子
1
Motivation
①Evaluation of reproducibility when
angle of polarizing plate is turned.
The same sample is used.
②Measurement of response curve
when filter is put.
2
Evaluation of reproducibility of
response curve in the same sample.
The last data was used.
①
3
When measuring
it on the same
condition, a few
error margins are
seen.
4
Condition of difference
Event
numb
er
｜ Standardized quantities of light - Measured quantities of light ｜
(ADC counts)
5
回数/ばらつきの
PMT count
平均
MPPC
count
15.5±7.3
13.6±13.2
25.9±6.8
13.4±13.3
36.3±7.1
13.5±13.2
48.5±9.4
14.1±13.4
59.6±12.1
13.5±13.2
612.2±15.9
14.2±13.5
78.5±8.2
14.1±13.4
812.6±15.4
13.7±13.2
99.4±11.0
13.7±13.2
The condition
of the
difference
looks larger
MPPC.
6
②Measurement of
response curve when
filter is put.
New Setup
Setup when filter is
put
90 percent is
intercepted
with the filter.
HV curve
PMT
ADC
counts
PMT HV（V）
The voltage was set to 700V. It
measured response curve five times.
8
Reproducibility in
the polarizing plate
is made well.
It is similar the
other as many as
four times.
9
Response curve
MPPC
P.E.
PMT
ADC counts
10
11
plan
• The measurement on the same day is
obtained a good result of reproducibility.
• How to evaluate reproducibility is established.
• The response curve fit by the fit function.
12
• Back up
When measuring it on the same
condition, a few error margins
are seen.