From: Giuseppe Battistoni (Giuseppe.Battistoni@mi.infn.it)
Date: Thu Jan 18 2007 - 17:24:02 CET
Dear Etam
I have the doubt that you have misinterpreted the meaning
of "missing energy" in that context.
This is not the amount of non-coservation of energy lost outside your
geometry.
Energy conservation in FLUKA is assured up to the machine accuracy
and the energy lost outside your geometry (namely in the black-hole)
is the one called "escaping the system".
"Missing energy" referes to energy which cannot be made available
(really speaking) to detection, but it has been correctly considered in
the process.
In practice this is the energy lost in nuclear binding, and it can be
"large" for heavy nuclei targets.
Giuseppe Battistoni
On Wed, 17 Jan 2007, Etam Noah Messomo wrote:
> This is a multi-part message in MIME format.
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> Hi all,
>
> When I consult the output file (xxx001.out) after a run with materials =
> with a high density (in this example Pb target in a Ta container), the =
> very last line in the section on the breakdown of energy shows missing =
> energy (GeV missing) of 6.3% which seems very high. This effect is =
> unrelated to :
> - the number of particles used for a run
> - changes in the geometry of the system for the same target geometry =
> (i.e. changing vacuum regions)
> Are there any cards which can be used to reduce this missing energy?
>
> Cheers,
> Etam
>
> --------------------------------------------
> Etam Noah
> AB-ATB-IF=20
> CERN, CH-1211, Geneva 23=20
> Switzerland
> Tel: +41 (0) 22 767 1358
> Fax: +41 (0) 22 767 8990
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