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RENO PMT TEST
PMT type DAQ setup Single Photon Electron
Resolution Dark Current After Pulse Ratio with two
methods Summary
Kyung Ju Ma, 2007. Oct. 6 RENO Collaboration meeting
강 운구 , 김 영덕 , 마 경주 ,
공 대정 1, 김 동희 1, 김 우영 1, 김 지은 1, 서 준석 1, 사무엘 스테파냔 1, 아딜 칸 1,
안드레이 김 1, 박 인곤 2, 박 명렬 3, 안 정근 4, 이 효상 4,
김 수봉 5, 김 장호 5, 김 현수 5, 박 강순 5, 박 정식 5, 신 경하 5, 이 재승 5, 전 은주 5, 최
선호 5, 권 은향 6, 김 동현 6, 박 차원 6, 서 현관 6, 유 인태 6,
최 수용 6, 최 영일 6, 김 성현 7, 김 재률 7, 임 인택 7, 장 지승 7, 정 인석 7, 주 경광 7, 오
영도 8, YU. Krylov9, G. Novokova9, E. Yanovich9, N. Danilov10
세종대학교 . 1 경북대학교 . 2 경상대학교 . 3 동신대학교 . 4 부산대학교 . 5 서울대학교 .
6 성균관대학교 . 7 전남대학교 . 8 포항가속기연구소 . 9INR. 10IPCE
RENO Collaborators
Hp pulse/function generator 8116A
R5912, XP1806 -data taking
100Mhz, FADC Module(shaped)PMT set with ice water & Dark Box
DAQ SETUP
Single Photon Electron Resolution
R 7081
116 [mV] 61.5
[mV]※ qtot ∝ Charge of SPE
Clear single photon electron peak
Peak-to-Valley gain SPE charge [pC]
R 5912 ~ 4 ~107 (1300V) 24.0
Xp1806 ~ 4 ~107 (1550V) 12.3
Temp..[oC] Mean Error[±]
2.9 1.21 x102
1.50
14.3 1.16×102
0.98
24.5 1.14×102
2.32
Gain dependence of temperature
Dark Current Temperature Dependence(R5912) RENO expected Dark Current at 10 ~ 15 oC is ~ 6 K/s
6~10 K/s are measured for the expected region which are more higher than expected. For the steep increase at 14 ~ 15oC, the spent time after closed
dark Box having been considered.
Dark Current Temperature Dependence(R7081)
linear dependence
show 8 K/s for the region of 10 ~15 oC
more higher than R5912 and XP1806
Dark Current Temperature Dependence(XP1806)
linear dependence
show 2 ~ 3 K/s for the region of around 10 oC
After Pulse Ratio using accumulated Method(R5912)
First After Pulse Ratio = 1.88 %
Second After Pulse Ratio= 3.65 %
After Pulse Ratio using accumulated Method(XP1806)
First After Pulse Ratio =3.26 %
Second After Pulse Ratio=2.47 %
After Pulse Ratio using accumulated Method(R7081)
First After Pulse Ratio =2.57 %
Second After Pulse Ratio=2.91 %
Pulse Ratio using clustering Method(R5912)
After Pulse Ratio = 2.6 ~3.9 %
After Pulse peaks are occurred after 0.7, 1.7 and 6.7 micro second.(Primary signal region (1300,1360)
ⅹ10nsPro
bab
ilit
y
(No.
of
SP
E /
0.1
.mic
ro.
sec.)
0.7 micro. Sec.1.7 micro. Sec. 6.7 micro. Sec.
Pulse Ratio using clustering Method(xp1806)
ⅹ10ns
Pro
bab
ilit
y
(No.
of
SP
E /
0.1
.mic
ro.
sec.)
After Pulse peaks are occurred after 1.2 and 6.7 micro second. (Primary signal region (1310,1350)
1.2 micro. Sec. 6.7 micro. Sec.
Pulse Ratio using clustering Method(R7081)
ⅹ10nsPro
bab
ilit
y
(No.
of
SP
E /
0.1
.mic
ro.
sec.)
After Pulse Ratio = 2.1 ~2.6 %
After Pulse peaks are occurred after 0.7 and 6.7 micro second. (Primary signal region (1010,1050)
0.7 micro. Sec. 6.7 micro. Sec.
After Pulse Ratio using the clustering Method
Both PMT show 2 ~ 3 % which is correspond to the PMT specification
After Pulse don’t show temperature dependence. it has been known and
convinced
SUMMARY
Tested PMT: Hamamatsu PMT(8 inch-R5912, 10inch-R7081),
Photonis PMT(8 inch XP1806)
DAQ setup: 100Hz FADC, PMT set with ICE water, 10ns width Pulse generator
R5912, r7081 show the clear single photon electron resolution.
Gain and Dark Current show the temperature dependence.
Dark Currents are 6~10 K/s(R5912), 8K/s(R7081), 2~3K/s(XP1806) for the temp.
range(10~15oC)
After Pulse Ratio(APR) was tested using two method (Accumulating, Clustering ).
- APR by Clustering Method for R5912, XP1806 and R7081 show 2 ~ 3 % which is correspond to the PMT specification
- APR by Accumulated metod for R5912, XP1806 and R7081 show 5 ~5.7 % which is correspond to the PMT specification
R5912, XP1806 and R7081 have typical After Pulse shape as show fixed After Pulse time region after Primary Signal.
After Pulse don’t show temperature dependence.