MPPC mass check Hidetoshi OTONO

Change point ADC Gate width : 6ns => 35ns Gain mesurement without LED

MPPC Relay MPPC Relay MPPC Relay HV Adapter DC board RS232C Control PC Dark Box CAMAC Menu de OTONO System - Version ４ Ch1 Ch2 ChN - Control HV - Turn ON/OFF relays. - Number of channel can be increased easily. AMP Charge ADC CCNET Ethernet x 63 Scaler x 10 Disc. G.G Disc. 35ns gate Clock Thermal measurement Analysis PC Output register veto AMP NIM Ethernet

1 p.e rate and 2 p.e rate mesurement threshold MPPC out Disc. out ADC input ADC gate Scaler input 1 p.e rate = scaler rate 2 p.e rate = scaler rate x {(ADC entry – 1 p.e count ) / ADC entry} gain = (1p.e ch – pedestal ch) x ADC least count /(Amp の倍率 x 電気素 量 ) Scaler count isn’t equal to ADC count because of ADC veto.

#6 のデータ ペデスタル ７７．８Ｖ ７８．３Ｖ ７８．８Ｖ ７９．３Ｖ ７９．８Ｖ

V = ℃