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Re: beam spot at radiator (fwd)



Hi Elke
I would have thought that we need more information to judge things here. 
If the beam got narrower at the goniometer does this mean that the 
angular divergence increased? If the emittance is constant then this 
would be the case. Don't we want to know sigma_x, sigma_y, delta_thetaX 
and delta_thetaY?

sorry to be so conservative but usually everything is coupled.
jim

Elke-Caroline Aschenauer wrote:
>
> For completeness Leigh's mail
> attachment at
> http://www.jlab.org/~elke/DIMAD-vs-elegant.ppt
>
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> ---------- Forwarded message ----------
> Date: Mon, 14 Jul 2008 17:56:38 -0400
> From: Leigh Harwood <harwood@jlab.org>
> To: elke Aschenauer <elke@jlab.org>
> Subject: beam spot at radiator
>
> Elke,
>
> Here are 2 versions of basically the same info.
> The first is what one gets plotting the particle tracking w/o any
> tweaking around.
> The second is the same graph I showed you.....with some lines and such
> added.  It has the new calculations shifted to be at the same non-zero
> centroid as the Baseline run from last year.
>
> Lemme know what you can!
>
> Thanks!
>
> cheers,
>
> L