[fluka-discuss]: error: mxheav too small - heavy ions on heavy target

From: Schroeck Christopher <C.Schroeck_at_gsi.de>
Date: Mon, 29 Apr 2024 10:16:23 +0000

Dear FLUKA development team,
dear FLUKA users,

we encoutered an undocumented error, when running a simulation based on a simplified model of our heavy ion irradiation experiments, here at GSI Helmholtz Center in Darmstadt. Our simulations are based on FLUKA 2023 version 3.3, which is the most recently installed version on our cluster. We would be very grateful if you could have a look at the problem and help us figuring out the solution.

Please find attached two input files as minimal examples that describe our problem. In both cases, there is a heavy ion beam collimated by a block of solid metal. In one case the material is titanium (Ti), in the other case tungsten carbide (WC). While we are not facing any issues in case of Ti, many simulation runs are aborted in case of WC. Exemplarily, we have provided the corresponding .err and .out file of such an aborted simulation. The error says:
"Abort called from EVEVAP reason MXHEAV TOO SMALL!! Run stopped! STOP MXHEAV TOO SMALL!! "

We also observed, that the more primaries are set, the more simulation runs are aborted. In this case, 90 jobs out of 200 were aborted. Similar issues were observed in other cases, where other heavy target materials like gold were used.

Is there something we have overlooked? We are grateful for any advice.


With best regards


Leon and Christopher

--
Christopher Schröck
Doktorand / PhD Researcher
Materialforschung / Materials Research Group
Phone / Telefon: +49 6159 71 1896
Email: c.schroeck_at_gsi.de
Room: C27.2.018
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Planckstraße 1
64291 Darmstadt
Germany
www.gsi.de<http://www.gsi.de>
Commercial Register / Handelsregister:
Amtsgericht Darmstadt, HRB 1528
Managing Directors / Geschäftsführung:
Professor Dr. Paolo Giubellino, Jörg Blaurock
Chairman of the GSI Supervisory Board / Vorsitzender des GSI-Aufsichtsrats:
Ministerialdirigent Dr. Volkmar Dietz
________________________________
Von: Schroeck Christopher
Gesendet: Montag, 22. April 2024 17:41
An: fluka-discuss_at_fluka.org; Kirsch, Leon; Kozlova, Ekaterina Dr.
Betreff: error: mheav too small - heavy ions on heavy target
Dear FLUKA development team,
we are two PhD researchers at GSI Helmholtz Center in Darmstadt, that are using your code to optimize our experimental setups. Unfortunately, we are encountering an undocumented error. These were tested using FLUKA 2023 version 3.3, which is the most recently installed version on our cluster.
We would be very grateful if you could have a look at the problem and help us figuring out the solution.
Please find attached two input files as minimal examples that describe our problem. In both cases, there is a heavy ion beam collimated by a block solid metal. In one case the material is titanium (Ti), in the other case tungsten carbide (WC). While we are not facing any issues in case of Ti, many simulation runs are aborted in case of WC. Exemplarily, we have provided the corresponding .err and .out file of such an aborted simulation. The error says:
"Abort called from EVEVAP reason MXHEAV TOO SMALL!! Run stopped! STOP MXHEAV TOO SMALL!! "
We also observed, that the more primaries are set, the more simulation runs are aborted. In this case, 90 jobs out of 200 were aborted. Similar issues were observed in other cases, where heavy target materials like gold were used.
Is there something we have overlooked? We are grateful for any advice.
With best regards
Leon and Christopher
--
Christopher Schröck
PhD Researcher / Doktorand
Materials Research / Materialforschung
Phone: +49 6159 71 1896
Room: C27.2.018
c.schroeck_at_gsi.de
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Planckstraße 1, 64291 Darmstadt, Germany, www.gsi.de
Commercial Register / Handelsregister: Amtsgericht Darmstadt, HRB 1528
Managing Directors / Geschäftsführung:
Professor Dr. Paolo Giubellino, Jörg Blaurock
Chairman of the GSI Supervisory Board / Vorsitzender des GSI-Aufsichtsrats:
Ministerialdirigent Dr. Volkmar Dietz

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Received on Mon Apr 29 2024 - 14:10:28 CEST