Subject: Tank-end operations
Nicola.Zaccheo@lngs.infn.it
Date: Mon Jul 10 2000 - 11:48:05 EDT
Ciao a tutti,
today we opened the two boxes that I turned off last week.
For both (4B10-11 and 4C02-11) we replaced the bad (flasher) PMT
with the spare one. We left them out of acquisition and I'll put
back them tomorrow (note that these were the last tank end operations
with the Massimo's help!).
I take the opportunity to point out the worst boxes that need an
operation (as from last PMTs check):
1B03-0 bright/filled in spe
1B09-0 bright/dynode peak
1T14-0 bright/filled in spe
1T17-1 very bright/filled in spe
2B01-1 dynode peak/unstable
2B03-1 variable brightness/dynode peak
2C04-0 bright/filled in spe/dynode peak
2W03-0 unstable/bright/dynode peak
2T04-1 filled in spe/bright/dynode peak
2T06-0 filled in spe/dynode peak
3B01-1 bright/unstable
3B05-0 very bright
3C05-1 very bad signal (*)
3C12-0 very bad signal (*)
3C16-0 bright/filled in spe/dynode peak - impossible to set the gain
3C16-1 very bad signal (*)
3E06-0 very bright/filled in spe (*)
3E07-0 very bad signal (*)
4T10-1 very strong dynode peak
6C16-0 bright/unstable/filled in spe
6T01-0 bright/filled in spe
6T11-0 very bright/filled in spe
(*) these boxes need urgently a tank-end operation with following
priority:
3E07-0, 3C12-0, 3C16-1, 3C05-1 and 3E06-0
I can start these works (together with Roberto) this week, starting from
the day after tomorrow because tomorrow I'll be alone
Nicola
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