Re: [fluka-discuss]: Core dump with heavy ion beam

From: Jeremy Northum <jnorthum_at_gmail.com>
Date: Wed, 27 Aug 2014 14:31:00 -0400

Dear Francesco,

Thank you for the response. I looked to the next release.

Thanks,
Jeremy


On Tue, Aug 26, 2014 at 4:19 PM, Francesco Cerutti <
Francesco.Cerutti_at_cern.ch> wrote:

>
> Dear Jeremy,
>
> thanks for your message.
>
> The crash was induced by an uranium interaction generating a superheavy
> fragment extremely excited, whose evaporation went wrong. A fix has been
> already implemented and will be made available with the next minor release,
> including a few physics developments and planned shortly.
>
> Best regards
>
> Francesco
>
> **************************************************
> Francesco Cerutti
> CERN-EN/STI
> CH-1211 Geneva 23
> Switzerland
> tel. ++41 22 7678962
> fax ++41 22 7668854
>
>
> On Mon, 25 Aug 2014, Jeremy Northum wrote:
>
> Dear FLUKA Community:
>>
>> Any help with this problem would be very much appreciated.
>>
>> Thanks,
>> Jeremy Northum
>>
>>
>> On Wed, Aug 6, 2014 at 11:39 AM, Jeremy Northum <jnorthum_at_gmail.com>
>> wrote:
>>
>> Dear FLUKA Community:
>>
>>
>>
>> I have created a simple model with cylindrical symmetry to
>> estimate the dose equivalent rate resulting from a heavy ion
>> beam striking a carbon target an a copper beam dump. Steel,
>> borated polyethylene, and concrete shielding are present. I have
>> a USRBIN tally set to score dose equivalent outside of the
>> concrete.
>>
>>
>>
>> First scenario:
>>
>> Beam: Ca-48
>>
>> Energy: 261 MeV/u
>>
>> Target thickness: 0.914 cm
>>
>> Result: FLUKA runs without any problems
>>
>>
>>
>> Second scenario:
>>
>> Beam: U-238
>>
>> Energy: 202.1 MeV/u
>>
>> Target thickness: 0.171 cm
>>
>> Result: FLUKA crashes with “Program received signal SIGFPE:
>> Floating-point exception - erroneous arithmetic operation.”
>>
>>
>>
>> The only difference between the two input files is the beam
>> energy in BEAM, the beam Z and A in HI-PROPE, and the target
>> thickness in RCC TGT. No other changes were made to the input
>> file with the uranium beam.
>>
>>
>>
>> I am using the most recent version of FLUKA with gcc version
>> 4.7.1. The executable was linked with the ldpm2qmd script. I do
>> not have any geometry errors when I open these input files in
>> flair. The files for each case are attached.
>>
>>
>>
>> Any help would be appreciated.
>>
>>
>>
>> Thanks in advance,
>>
>> Jeremy Northum
>>
>>
>>
>>
Received on Wed Aug 27 2014 - 21:57:50 CEST