CONTENTS Bleeder Zener diode PMTwith Zener diode test

CONTENTS Ø Ø Bleeder回路について Zener diodeについて PMT(with Zener diode) test まとめ

Zener Diode n n n 低ノイズZener diode (recommended by HPK) プラスチックパッケージ 電気的特性 (T=25°C) Type Zener電圧 [V] Min Zener電圧 [V]Max 温度係数. [m. V/°C] RD 68 S 64. 00 72. 00 ~70 RD 82 S 77. 00 87. 00 ~83 Zener diode

PMT(with Zener diode) test Condition & Procedure PMTには、zener diodeが充分zener領域に 入る電圧を印加し、LEDをBG源としてalpha eventのDAQを行った PMT(final version) : HV 900 V , 1*107 gain current @ zener diode R 68 S ~38 micro. A R 82 S ~32 micro. A Alpha event DAQ (without BG ) Alpha event DAQ (with BG) (Rate dependence Test) Experimental setup

PMT(with Zener diode) test gain calibration Gain(LEDを使用してcalibration) g: gain c: ADC least count σ: standard deviation M: mean of ADC spectrum e: elementary electric charge

Ø PMT(with Zener diode)test結果 @Rate Liq. Xe Dependence Test 1*107 gain Alpha @B. G. ON/ Alpha @B. G. OFF Background level 5 [μA] Back Groundまで安定した出力(1%) 1μA