MPPCの回復時間
検出器ミーティング
2007.5.1
須藤
Recovery time （遅い成分）
setup
MPPC
LASER
pedestal
LASER
λ : 408 nm
width : 52 ps
output : 130 mV
ADCを使って測定
回復の遅い成分
LASER - LED
LED - LASER
Chi2 / NDF = 18.8 / 11
Chi2 / NDF = 7.4 / 8
[ μs ]
• output = ( 100 – par(1) ) * (1 – exp[- par(0) * t ] ) + par(1) [ % ]
LASER – LED : τ1 = 1 / par(0) = 4.28 ± 0.23 [ μs ]
par(1) = 88.3 ± 0.16 [ % ]
LED – LASER : τ2 = 4.32 ± 0.19 [ μs ] , par(1) = 56.1 ± 0.60 [ % ]
Recovery time （速い成分）
setup
MPPC
LASER
LASER
λ : 408 nm
width : 52 ps
output : 130 mV
Deley time
回復の早い成分
uncertainty Chi2 / NDF
遅い成分の
縦軸切片の値
2.0
10.08 / 10
0
40.4 / 10
• output = ( 88.3 – par(1) ) * (1 – exp[- par(0) * t ] ) + par(1) [ % ]
LASER – LED : τ = 3.93 ± 0.13 [ ns ]
LED先 LASER後