Re: [fluka-discuss]: problems with source.f for an electron beam

From: Stefan E. Mueller <stefan.mueller_at_hzdr.de>
Date: Wed, 14 Apr 2021 09:45:29 +0200 (CEST)

Dear Zhiyuan,

I also am able to link and run your code, and I can see results in the
defined USRBIN scorers.

I have one suggestion concerning your source.f-file - when using numbers
like 0., 1., 2., 3. or pi (3.1415926 in your case), it is advised to use
the predefined constants ZERZER, ONEONE, TWOTWO, THRTHR or PIPIPI defined
in $FLUPRO/flukapro/(CNSTFL), which is included via the

INCLUDE '(DBLPRC)'

statement at the beginning of the source.f-file. This gives a consistent
representation of the numbers with the maximum precision.

Cheers,

         Stefan

--
Stefan E. Mueller
Department of Information Services and Computing - Computational Science
and Institute of Radiation Physics
Helmholtz-Zentrum Dresden-Rossendorf
Tel: +49 (0351) 260 3847
Stefan.Mueller_at_hzdr.de
http://www.hzdr.de
Vorstand: Prof. Dr. Sebastian M. Schmidt, Dr. Diana Stiller
Vereinsregister: VR 1693 beim Amtsgericht Dresden
On Tue, 13 Apr 2021, Mikhail Polkovnikov <Михаил Полковников> wrote:
> Dear Zhiyuan,
> 
> I was able to run your source file and input without problems, and almost
> all electron beam is stopped in the "screen" region, which is 1 cm thick!
> What kind of source do you try to implement in file? Is it just an annular
> beam in a negative direction?
> 
> 
> On 13.04.2021 14:02, 梅志远 wrote:
>
>       Dear FLUKA experts,
>
>       I met a strange issue when calculating the radiation dose
>       resulted by an electron beam.
>
>       Since beam loss happened in the target and the beam line pipes,
>       I wrote a source.f to define the complex beam source.
> 
>
>       The codes ran well and finished OK. However, no results can be
>       obtained!  All results are Zero.
>
>       Even stranger, sometimes the same codes can run OK and
>       meaningful results can be gotten!
> 
>
>       The inp file and source.f file are attached here.
> 
>
>       Any help is appreciated!
> 
>
>       Zhiyuan
> 
> 
> 
>
>       --
>
>       姓名：梅志远
>
>       职务：博士研究生
>
>       单位：华中科技大学电气学院应用电磁工程研究所
> 地址：华中科技大学西九楼113室
> 电话：15527017168
> 邮箱：meizhiyuan_at_hust.edu.cn
> 
> 
> 
>

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Received on Wed Apr 14 2021 - 11:57:44 CEST