[G14_run] Vertex Distribution

[Eugene Pasyuk]

Natalie,

Could you make 1D plots for X and Y distribution. It appears that the 
the beam spot is smaller for the latest data, which is expected because 
we have tighter collimation now, 2 mm vs 2.6 mm. Would be good to 
compare the X and Y width for different targets.
Something I don't quite understand how Z distribution compairs between 
20b and 19b targets. 19b seems to be more or less as full as 20b but at 
the same time looks like if the density of HD is smaller (height of HD 
vs. height of window. Or may be it is different Al amount/distribution?
May be it has less Al in the center?

-Eugene

natalie at jlab.org wrote, On 04/08/12 21:49:
> Hi,
> Using a run taken over the weekend from the newly installed target, I have
> updated some of my vertex distribution plots. I have dubbed the new target
> "April Goldish Target - 19b" because I can't use bronze or plantium, so
> goldish was my next best guess.... If you have any questions or comments,
> please let me know. I have not included all possible plots, just a few
> choice ones.
>
> http://wwwold.jlab.org/Hall-B/secure/g14/Natalie/aprvertex.pdf
>
> Thanks,
> Natalie
>
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