????????MPPC????????

1
????????MPPC????????
2008??P6???

• 2009?3?11?
• ?????

2
??

• ?????
• MPPC?????????????
• ??????
• ???????
• ??????

??
??
3
?????
MPPC(Multi Pixel Photon Counter)
?????????????????? ???????????????? ??????
????? LaBr3 ???????????????????????
????????????????? ??????????????
4
???
MPPC (Multi Pixel Photon Counter)

GSO(Gd2SiO5) (Ce)

• MPPC???????400nm???????
• ????????????????

?????????????? MPPC?????????????
5
???
MPPC (Multi Pixel Photon Counter)

LaBr3(Ce)

• MPPC???????400nm???????
• ??????????
• ???????????

MPPC?LaBr3???????????????? ????????????GSO(Ce)?MPP
C????????????
6
MPPC (Multi Pixel Photon Counter)

• ???APD ????
• ??????
• APD???????????
• ?????????????????

7
??????????????(APD)
1????(APD)?????
????
?????? ?????? ???? ?????? ???????
????? ?????? ???????
N?
?? ??
?????? ??
???
??
??
2
P?
?????????
8
APD ?2 ?????
1.???????

• V lt Vbd
• ???lt100
• ???
• ? ??????
• V ? Vbd
• ???106
• ??? Q
• ? C (V ? Vbd) ????????

• V ???
• Vbd ?????????
• C ?APD??????? (90fF)

2.???????
9
MPPC???
R200kO
?? ??????? ???????Nfired ?Q ????? Qtotal
Nfired Q Qtotal ? Nfired ? ?????
10
????MPPC
??????2???MPPC(?????????)???
?? S10362-33-050C S10362-33-025C
????? 3600 14400
??????? 50µm50µm 25µm25µm
??????(nm) 400 400
???????? 3mm3mm 3mm3mm
??????? ?? (V) 68.79 (at 25?) 69.07 (at 10?)
??? 7.48105 (at 25?) 2.75105 (at 10?)
11
????(PDE)
???? ???? ??? ????
???? 1??????????????????????? (70 at
400nm) ??? 1??????????????? ????
1??????????????????
12
MPPC1????
MPPC?????????
??? (050C 61.5? 025C 30.8)
13
MPPC?????
(100100µm)
050C
025C
14
?????????
15
?????????
?? (g / cm3) ?????? (ns) ?????? (nm) ????????() (FWHM _at_662keV) Light output ( / MeV ) ???
NaI (Tl) 3.67 230 415 6-7 39,000 ?
GSO (Ce) 7.13 30 - 60 440 8-9 9,000 ??
LaBr3 (Ce) 5.29 20 360 3 63,000 GSO?7? ????
PMT??
16
??????????
11
mm??
11
6
6
3
3
20
27
13
??????????????????
GSO
LaBr3
17
MPPC????????????

• MPPC?????????????????
• MPPC?????????????????????????

18
??????(??)
145mm
??????? (??????)
19
MPPC???????
20
MPPC??????
60mV
200ns
GSO050C ???137Cs
21
GSOMPPC(050C3600????)???????
18.7 (FWHM)
22
????????
GSO050C 4??????

• ???GSO???
• ?????????????????????????????
• 662keV????????78361142(Ch)s14.6

_at_21?
23
???????????
Time-Channel
Time-Voltage
BIAS VoltageV
Peak Channel
Timemin
Timemin

• 662keV??????????????
• ????????????????????????????????????

24
?????????
CLEAR-PULSE? E6625?E6665???
????(CLEAR-PULSE???????)
E6665 ???? 0500V ?????? 0.2?? (AC100V10????
??) ?????? 0.03??
E6625 ???? 0200V ????? 1??
25
?????????(2)
???????????4???
_at_22?

• ????????????????????????????????
• 662keV???????? 5882103(Ch)s1.8

????? s14.6
26
GSO????????????
???????GSO?MPPC??????????????4???

• ???????????????
• ????????????????????????
• 662keV???????? 5136749(Ch)s14.6

_at_22?
27
????????
?????????????????MPPC???????????????????????????
10mm
GSO
?????
MPPC
28
GSO???????????4???(????????)
??????????
????????
_at_22?
_at_20?
137Cs 662keV?????????
5136749(Ch) s14.6
5501201(Ch) s3.7
29
?????????????
GSO050C
1??-1200Ch(10)
????????????????(0.2?)??

• ????
• ???????????
• ?????????????
• ?????????????

30
GSOMPPC(050C)?????????
_at_17?
Ch(10.60.1)EkeV(-3840)
22Na1275keV?????? ?????? (?????1????? 2????????) ?
??????13.33.7
?????4??????????????????????????
31
???????
32
GSOMPPC(050C)??????????
662keV?18.71.9
33
????????????????????GSO
_at_17?
050C(3600????)
025C(14400????)
1275keV?????????
13.33.7
4.72.5
34
???????
050C(3600????)
025C(14400????)
35
???????????????MPPC050C(3600????)
_at_17?
GSO
LaBr3
LaBr3???????????
??????
36
???????
GSO
LaBr3
37
???????????????MPPC025C(14400????)
_at_17?
GSO
LaBr3
1275keV?????????
4.72.5
7.53.7
025C(14400????)??LaBr3?????????????????????
38
???????
GSO
LaBr3
39
??????????????(GSO??)
_at_17?
662keV????????????(FWHM)
050C18.71.9
025C20.41.4
40
???????????????(025C???)
_at_17?
662keV????????????(FWHM)
LaBr38.60.3
GSO20.41.4
LaBr3???????????????
41
???????????????(2)
303keV
356keV
LaBr3??356keV?????????
42
MPPC????????????????????????_at_662keV
MPPC ??? S10362-33-050C (3600????) S10362-33-025C (14400????)
GSO(Ce) 18.71.9 20.41.4
LaBr3(Ce) 9.91.5 8.60.3
43
?????????

• ?????????MPPC(025C)????????????????LaBr3??????????
  ????
• ???????LaBr3?????GSO???????????????
  LaBr3MPPC(025C)?8.6(FWHM_at_662keV)
• ?????????(APD,PMT?)
• MPPC????????????????????????(????????1????????????
  )

44
????? ????????????
45
Back up
46
MPPC??????????

• ???????????????
• (E?Ch???) ???????????
• ????????????????????????????
• 1?????2?????????????
• (????????????????????)

47
(No Transcript)
48
?????????? 050C lt 025C
49
LaBr3050C
Ch(2.41042.5103)
1-exp(-(1.210-31.710-4)EkeV)
50
LaBr3MPPC(025C)???????????????
662keV???????? 7979202(Ch) s2.5
51
LaBr3(Ce) ??????????
???????? PMT ???????? R6231 ???.
13mm
Saint-Gobain ??
f1313mm3?LaBr3
Energy Resolution _at_662keV(FWHM) LaBr3
3.10.1 Decay time 25 nsec Light
Output1.6 (?? GSO(Ce)0.2) (NaI(Tl)????1???) ???
???
LaBr3(??)?GSO(252513mm3)? ????????????(133Ba)
52
GSO???????????????????
53
MPPC???

• ????????(PMT??????)
• ????????
• (APD50-500V,MPPC70V)
• ??????(??????????)
• Timing Resolution???
• (APDgt1000ps,MPPC50ps)

54
????????
3A
2A
1A
5?
10?
?????????????????????????
55
??????
??
??
0