Please be mindful of that fact that in a set of 4 tof's behind a C box,
only the central ones yield a "safe" C efficiency (yes, it requires a
working paddle scint behind them, else we can use only one.)
The two "external" ones could have a non-negligible geometrical
inefficiency. In other words, can fire correctly for events that did not have
to go through the C box.
as far as I know we get high 90' in all tofs, at both low/high gain. In
two instances we have had a problem with the tag scintillator behind a tof
(so, we have onyl 3 working ones) and in two instances we got 90 %. In
both those two latter cases the paddle scint fell off at some point and
was hanging behind the tof, which does not give a nice flat coverage.
So, we need better duct tape for a better analysis...
-- t
________________________________________________________________________________
Tancredi Botto, phone: +1-617-253-9204 mobile: +1-978-490-4124
research scientist MIT/Bates, 21 Manning Av Middleton MA, 01949
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
On Sun, 27 Oct 2002, zhangchi wrote:
>
> Hi
>
> I mentioned in last message I was about to siggest them going back to
> default CC HV after a little bit on the 10% incremented. but I forgot.
>
> I need to take a nap now. please also see my telemarketing for the two
> macros. I really do not have the courage to write a full fledged
> documentation so I ll sent emails instead fot the moment OK?
>
> Chi
>
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