Hi Michael-
I can come fix this PMT this evening - sorry I can not before this
as my wife has the car for a doctor's app't. As long as I can get an
access sometime around 7pm tonight I can do it.
Pete
On Fri, 12 Nov 2004, Electronic Log Book wrote:
> Operator: kohlm
>
> Enjoyable shift.
>
> During run 12520, lightguide of left TOF 5 bottom (LTB5) broke (see elog). Not the joint with the scintillator but rather the round adapter which connects to the tube. I cleaned and glued the adapter piece to the curved piece with optical glue, presently curing over night with UV light.
>
> Some TOF expert should be available on Friday morning to reinstall the phototube (it is located on the small bench at the left-sector wall, grease is in the cage near the fence) and gainmatch (probably the "old" value of -2300V from before last Monday is adequate.
>
> I believe right-TOF3 top (RTT3) was also a candidate of inefficiency. Someone may want to check the lightguide joint as it presently points to a different direction than its three neighbors RTT0...2
> The shielding of RTB3 had partially slipped off, I put it back in place. Maybe that's why it was less efficient?
>
> Took runs 12520-12526 without LT5.
>
> MK
>
>
>
>
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Pete Karpius
Graduate Research Assistant
Nuclear Physics Group
University of New Hampshire
phone: (603)978-6152
FAX: (603)862-2998
email: karpiusp@einstein.unh.edu
http://pubpages.unh.edu/~pkarpius/homepage.htm
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