Hi Karen
you can find equal length cables on top of one of the racks.
There is a few spares (they should all be the same "new" lenght)
However, isn't this TDC mismatch an effect of the very short
transit time in the small paddles used for eff. measurement ?
we already had this problem with the start counter (15 ns)
I would rather delay those few channels w/ the small paddles
other than accumulating new cable lenght. Hope it helps
-t
-- ________________________________________________________________________________ Tancredi Botto, phone: +1-617-253-9204 mobile: +1-978-490-4124 research scientist MIT/Bates, 21 Manning Av Middleton MA, 01949 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^On Wed, 11 Sep 2002, Karen Dow wrote:
> > Tancredi, > > I think we need to make the cables between the TDC delay/split and the > TDC longer. We're on the hairy edge of having the stop come too soon > (if you read the recent BLAST_TOF messages about the missing bottom > tubes). I'd add around 25ns. > > Did you measure the length to make the Cerenkov & neutron cables? Then > I could add 5m to that, rather than pulling one out to measure it. > > Maybe I'd add more than 25ns, come to think of it. The CS is only 12ns > after the PT right now, should be about 25-30ns late, I'd think, in case > we run slow protons. > > Thanks. > > Karen >
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