Hi Chris,
I suppose I am a bit confused by your plots. I see what I assume
to be about 6 fills. The fills are characterised by a lot of events with
only a few hits in the wire chambers which then as the fill progresses
increases to reach stable values around 18 and 36 hits which correspond to
one or two track events. To interpret this one could think that the
chambers were collecting data as they were turned on. ie triggers were
coming in while the WC HV was being ramped so we are inefficient at the
beginning but this should only take 10-20 seconds. What is the time scale
for your plot? The other conclusion could be that the initial part of the
fill is noisy and after a while the halo or X-rays from a high current in
the gas target are reduced and the chamber behaves as it should.
--On Monday, February 10, 2003 5:04 PM -0500 Chris Crawford
<chris2@lns.mit.edu> wrote:
> hi,
> these graphs may be usefull in determining cuts on "nwl,nwr". they are
> the number of hits on left/right as a function of time (entry #) over
> three runs 3329,30,31. these were hydrogen runs taken in the last day or
> so, right inbetween deuterium runs. doug, does this look consistent
> with what you would expect? --chris
Cheers,
Douglas
26-415 M.I.T. Tel: +1 617 258 7199
77 Massachusetts Avenue Fax: +1 617 258 5440
Cambridge, MA 02139, USA E-mail: hasell@mit.edu
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