Subject: about 5W03-0
Roberto.Giuliani@lngs.infn.it
Date: Wed Aug 23 2000 - 11:22:10 EDT
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Subj: about 5W03-0
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Date: Wed, 23 Aug 2000 17:19:05 +0200
From: Roberto.Giuliani@lngs.infn.it
To: macro-gs@budoe.BU.EDU, macro-wrong@budoe.BU.EDU, GRASSI@PI.IFN.IT,
PAZZI@PI.INFN.IT
CC: GIULIANIR@lngs.infn.it
Message-Id: <000823171905.20215969@lngs.infn.it>
Subject: about 5W03-0
Ciao a tutti,
Starting from RUN 19796 (after the black-out happened on 4-AUG-2000), the box
5W03-0 lost gain, it was than 2 mV, this box was responsable for L/R problems (PHRASE and GC).
Furthermore looking at the laser calibration we noticed that this box was strongly undergain, so
today we investigated cheking many things such as PMT base, Voltage adjusting and so on.
We noticed that the signal cable (RG58) was fleky, then we discovered that the flekiness was caused
by the connector by the fanout side.
We replaced this connector obtaining a good signal from this box that will be ready for the first run
after calibration i.e. starting from run 19861
Ciao, Nicola & Roberto.
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