Transcript PMT ADC counts MPPC pe

Saturation of MPPC detector
ILC meeting
2010/11/25
M2
Hiroko Koike
1
width of gate dependence of response curve
MPPC
PMT
GATE
The fiber was concealed.
MPPC
Changing width of gate
200ns
160ns
120ns
100ns
80ns
70ns
60ns
50ns
PMT
GATE
2
result
MPPC
p.e.
赤・・・200nsec
黄緑・・・160nsec
青・・・120nsec
黄色・・・100nsec
ピンク・・・80nsec
水色・・・70nsec
深緑・・・60nsec
灰色・・・50nsec
If the width of the
gate narrows, the
response becomes
lower.
PMT ADC counts
measured response cureve
without using the reflection
material
MPPC
p.e.
5mm
5mm
PMT ADC counts
reflexible surface of scintillator
dependence of response curve
reflection
material
①
②
③
④
①
②
③
④
6
Angle dependence of polarizing plate to laser
PMT
y： ADC pulse height
x：rotation step of polarizer (°)
MPPC
①・・・黄緑
②・・・青
③・・・ピンク
④・・・水色
P4・・・赤
MPPC
p.e.
MPPC
p.e.
①
②
PMT ADC counts
MPPC
p.e.
PMT ADC counts
④
③
MPPC
p.e.
PMT ADC counts
PMT ADC counts
plan
• There is a relation between the area ratio of
scintillator and saturation.
・・・・
Evaluation of reproducibility of each result.
9
• backup
Response curve
MPPC
p.e.
PMT ADC counts
11