Re: USRBIN strange results

From: Alberto Fasso' <fasso_at_SLAC.Stanford.EDU>
Date: Thu, 22 Mar 2012 08:23:17 -0700 (PDT)

Hi Vladimir,

in my experience, this kind of "wave" shapes are caused by the non uniform
thickness of the vacuum chamber wall. They are a kind of "radiography" of the
vacuum chamber wall made at a very slanted angle, which amplifies the effect
of different wall thicknesses. I have got a similar pattern on radiographic
films exposed at the end of a vacuum chamber.

Of course, I may be wrong. But in your picture it is not clear what the
shape of the vacuum chamber is.


On Thu, 22 Mar 2012, Lavrik, Vladimir wrote:

> Dear experts,
> I use fluka-2011.2.10 with flair-0.9.7 for calculating energy deposition.
> I use USRBIN estimator with WHAT(2) ENERGY(all particles) in cartesian mesh
> with a 1cm-bin.
> Primary particles are Uranium ions with energy 0.9Gev/u go to copper target
> and I observe something like wave interference (attached pictures below).
> The media arounf the target is FLUKA pre-defined AIR.
> May you clarify me the nature of these waves?
> Best regards, Vladimir
Received on Thu Mar 22 2012 - 18:20:11 CET

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