[d2n-analysis-talk] Scintillator Paddle Time Differences

[David Flay]

On Wed, Apr 7, 2010 at 1:40 PM, Brad Sawatzky <brads at jlab.org> wrote:

> Watch your binning.  Each bin in the plots you sent appears to be 4--5
> nsecs wide.  You'll never see what you're trying to see on these histos.
> I would start with the raw histos to do this initial paddle-to-paddle
> calibration rather than the _c histos (even if you do null out the
> coefficients).
>
> I will also admit I don't understand the other spikes at -60 and +60
> on the rt_c[0]-rt_c-[1] plot, never mind the multi-spike structure on
> the rt_c[4]-rt_c-[5] plot...  The only thing that is that periodic that
> we might see here is the 2ns beam structure...  Do you know what the
> real units on your x axes are?
>

I was multiplying by 1e+9 -- however, the analyzer source code for
THaScintillator says that the resolution is 0.1e-9 seconds/channel.   So
maybe I should multiply by that number instead of 1e+9





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David Flay
Physics Department
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