Subject: MACRO's PMT annual servicing
From: Erik Katsavounidis (Erik.Katsavounidis@lngs.infn.it)
Date: Thu Nov 04 1999 - 11:52:03 EST
MACRO Colleagues,
Starting next week we are planning to perform a detector-wide adjustment
of the MACRO PMTs gains that currently run rather low. Maintaining gains
and PMT quality as good as possible is important for the wide spectrum of
sensitivities we are addressing in MACRO.
It has been almost a year since the last time a similar operation was
performed. The one coming up next week will be the last one performed.
We plan to proceed on a per-uvax basis, having first the gains of the
PMT in that uVax reset within 1-2 working days. Any tank-end work will
be left after the commission of the bulk of the uVax.
Threshold adjusting for the ERPGC and PHRASE will be inevitable.
We also plan to address major Helium contaminated PMTs by replacing them
(check out my August'99 posting).
Please let me know if you have any questions/comments or objections regarding
the proposed plan.
--Erik
This archive was generated by hypermail 2a24 : Thu Nov 04 1999 - 11:52:09 EST