RE: [fluka-discuss]: STOP ??? WHY HERE ??? error

From: Helmut Vincke <Helmut.Vincke_at_cern.ch>
Date: Thu, 13 Mar 2014 11:12:53 +0000

Dear Paola

Thanks a lot for the clarification and thanks for the warning concerning the reasonability of the cut-off. However, in my particular case it makes perfectly sense.

Best regards
Helmut

From: Paola Sala
Sent: 13 March 2014 12:09
To: Helmut Vincke; fluka-discuss (fluka-discuss_at_fluka.org)
Cc: Chris Theis
Subject: Re: [fluka-discuss]: STOP ??? WHY HERE ??? error

Dear Helmut
the "feature" is a remnant of an obsolete approximation algorithm, that has to be cleaned.
Indeed, for the moment, it is not possible to set a neutron threshold in between 20 and 60 MeV.
This of course has to be fixed, however, as Francesco already pointed out some time ago
"From the physical point of view, when setting a neutron cutoff so waiving
their transport down to thermal energies, one has to keep in mind that, as
the neutron kinetic energy reaches the input value, it is dumped on the
spot. For many purposes (evidently for energy deposition and activation
calculations) this just makes no sense. "
Regards
Paola
On 03/11/2014 06:58 PM, Helmut Vincke wrote:
Dear colleagues and FLUKA authors

Running the attached input file (FLUKA standard example.inp) gives me the following error:

Abort called from KASKAD reason ??? WHY HERE ??? Run stopped!
STOP ??? WHY HERE ???

The critical issues seems to be the neutron threshold being set to 30 MeV. The problem occurs at a neutron threshold: 20 MeV < Threshold <=60 MeV.
Outside this range the error does not occur.

Can someone explain that "feature"? The question in the error file "WHY HERE" in that respect is fully justified. :)


Best regards
Helmut
Received on Thu Mar 13 2014 - 13:08:28 CET