[G8b_run] Newly cooked data

[Franz Klein]

Hi,
as I mentioned several times, my quick (and dirty?) way to check the 
data quality has been the usual one: the histograms produced in user_ana 
(actually the one in seb/ subdirectory).
Please see the attached gifs - there is a problem with PART/GPID: the 
velocity approaches beta=1.03 instead of 1.0 (therefore the curved 'mass 
peak').

To see the effect of cutting TDC values as 4095, see the STtdc_s2 plot 
... 10,000 more but it shows it ...

Sorry,
Franz

On 06/21/2013 01:31 PM, Michael Dugger wrote:
> Hi,
>
> I was looking at some newly cooked data and am getting results for beta
> vs. momentum that look strange.
>
> The plot for the newly cooked data ->
> http://www.jlab.org/Hall-B/secure/g8b/ASU/tmp/NewBetaVsP.gif
>
> A plot of the previous version of cooked data ->
> http://www.jlab.org/Hall-B/secure/g8b/ASU/tmp/OldBetaVsP.gif
>
> The plots are from PERP, 1.5 GeV, run 48483. The new plot only contains
> events from file A01.B02, while the plot of the previous cook has all A01
> files.
>
> The resolution looks much better, but we now have and extra stripe below
> the proton, and the stripe below the pions is crossing the kaons more
> heavily.
>
> Is anyone else seeing this sort of behavior?
>
> Take care,
> Michael
>
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-- 
===============================================================
                   Franz J. Klein, Associate Professor
                   CUA, Department of Physics
                   Washington, DC 20064
   office: Hannan Hall 206          phone: 202-319-6190
   or: Jefferson Lab,CC F-243       phone: 757-269-6672
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