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

LASER

λ : 408 nm

width : 52 ps

output : 130 mV ADCを使って測定

pedestal

[ μs ]

LASER - LED LED - LASER

回復の遅い成分

• 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 [ % ]

Chi2 / NDF = 18.8 / 11 Chi2 / NDF = 7.4 / 8

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

LASER – LED : τ = 3.93 ± 0.13 [ ns ]

• output = ( 88.3 – par(1) ) * (1 – exp[- par(0) * t ] ) + par(1) [ % ]

uncertainty Chi2 / NDF

2.0 10.08 / 10

0 40.4 / 10遅い成分の　縦軸切片の値

LED先　 LASER後