From: Giuseppe Battistoni (Giuseppe.Battistoni@mi.infn.it)
Date: Wed Apr 26 2006 - 09:04:13 CEST
An example is better than an explanation.
Here in attachment you find a simple FLUKA geometry
which defines a cylindrical target, 1 cm thick
and of 2.5 cm of radius, where I have defined
an upstream, a downstream and a lateral region.
It should help you to solve your case.
On Tue, 25 Apr 2006, Sunil C. wrote:
> Date: Tue, 25 Apr 2006 09:45:08 +0530 (IST)
> From: Sunil C. <firstname.lastname@example.org>
> To: email@example.com
> Subject: Upstream and downstream
> Hi All
> I have this doubt for some time about the upstream and downstream for
> If assume a target RPP inside another bigger RPP and in between say air.
> Beam incident on face 1 of target. The upstream would be from the opposite
> face of face 1 (say face 2) to air. Thus for scoring , target region would
> be the first region (what(4) of first card of USRBDX ) and the air would
> be the downstream region (what(5) ). If so those particles that come out
> of the other faces (2 lateral sides, upward and downward) would also be
> considered for scoring. Even, those particles produced inside target and
> coming out from face 1 would also be from upstream to downstream.
> Is this correct?
> In that case how to score only those particles that come out of face 2 to
> air? That is in the forward direction using USRBDX? What I do is to define
> a plane at the outer edge of target (face 2) and divide the air column to
> two, one in the forward region and the other in the backward region. Now I
> can score from target to the air column in the forward direction.
> Is there another way of doing this?
> Sunil C
> Health Physicist
> Pelletron TIFR
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