Most of my time was spent working on understanding the scintillator timing
and the rf timing.  The main motivation for this was to understand that it is
being applied correctly in our GEn analysis, as the time of flight of the
neutron is a significant difference between Rob and my analysis.

Page 1
First, there is a somewhat sizeable timewalk correction that needs to be
applied to the BigBite scintillators.  Plotted is the time difference between
two paddles on BigBite when a track passed within 2cm of the edge of these
paddles.  The timing should be identical for these, sans any timewalk effects.
By choosing one paddle to have a high energy deposition, the other paddle's
timewalk effect should be clear.  Plotting this again 1/E we are able to
derive a simple correction.  This correction can be as high as 1ns

Page 2 and 3
I'm very concerned that the existing scintillator calibration was done
incorrectly.  By looking at the timing differences between the two paddles as
before for kin3a and kin3b, you can see that as one moves towards the bottom
thing there is a discrepancy of up to 250ps.  Kins 3a and 3b roughly agree
with minor shifts between the two.

These are roughly stable for the durations of the runs

Page 4
Looking at the rf timing difference for these using an empirical path length
correction, the phase that we measure so that we can provide an accurate shift
drifts around significantly between runs.

Page 5 and 6
Looking at two runs, only differing between this phase shift, we can see that
there is a significant amount of noise when looking at the higher current runs.

Page 7
Looking over a period of runs, the width that I fit for this distribution is roughly constant

Page 8
You can see that the noise to signal ratio jumps up dramatically with the
higher current runs, so this really is a luminosity effect.

Page 9 and 10
Looking at the scintillator timing spectrum between the lower and higher
current runs, the amount of noise that can be seen does not seem to be able
to accomodate this.

If we cannot find this source of the noise, I don't think we will be able to
apply the rf timing corrections properly.  Otherwise we are just introducing
noise into our system.

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