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Message ID: 14     Entry time: Thu May 8 19:35:18 2025
Author: Simon 
Category:  
Subject: PMT count rates 
I tested the PMTs and tried to reduce the background signal as far as possible.

PMT voltage (V) count rate (Hz)
Mid 1700 1200
North 1500 900
Cu 1300 1400


PMT Mid count rate strongly fluctuates.

Turning the light on in the ESR has no influence on Mid and North but increases the rate for Cu by 200Hz.
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