here's an update on the TOF RT3. from the last 20 runs, it was 98.5%
efficient, so there is no need to fix it. also, the repaired TOF LT5 is
now 97.2% efficient.
--chris
Chris Crawford wrote:
> integrated over the last 2 weeks, they are at least 90% efficient,
> probably 95%. although i'm not very sensitive to the forward tofs
> yet. are the light guides still tied to some rope so they do not fall
> down and break something?
> --chris
>
> Taylan Akdogan wrote:
>
>> On Fri, 12 Nov 2004, Adrian T Sindile wrote:
>>
>>
>>
>>> Hi!
>>> Taylan called me and I pointed him to the TOF repair web page.
>>> He graciuosly offered to mount the PMT on LT5 following the web
>>> instructions, as neither Pete nor I could be at Bates during the day
>>> today...
>>>
>>> To try and fix the RTT3, which Michael reported as having the
>>> lightguide at a different angle, the whole group of 4 TOFs needs to
>>> be taken out with a crane, RTT3 needs to be separated and then
>>> glued, cured overnight and put back the next day. As it is now, it
>>> still gets data (but it should be fixed ASAP).
>>> If the two techs whom we trained for this (Chris and Dave?) are not
>>> around anymore, Pete and I can come and fix it whenever there is
>>> plan on opening the hall for half a day (Monday, Tuesday? Just let
>>> us know)... and then come and put them back the next day. Data
>>> taking will probably have to stop for those two days (4 TOFs
>>> missing)...
>>>
>>
>>
>>
>> How inefficient are they? Unless they are completely inefficient,
>> which seems not to be the case, we should wait the weekly
>> maintenance day for this.
>>
>> Taylan
>>
>>
>>
>>
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