Re:Re: [fluka-discuss]: unit of dpa output by USERBIN

From: Stefan E. Mueller <stefan.mueller_at_hzdr.de>
Date: Thu, 27 May 2021 10:49:07 +0200 (CEST)

Dear Xueyan Zhu,

the "weight" in this case is not the physical weight of the particle. It
is a quantity associated to a particle in radiation transport simulations
which specifies the "importance" this particle has in the simulation. In
the scoring, the particles is added to the scorer taken into account its
weight value. In many cases, this weight value is simply "1.", but when using
variance reduction methods, the particle may have a weight value different
from 1 (all this is taken into account automatically when using FLUKA
standard scorers like USRBIN, USRBDX, etc.).

For a more detailed discussion, I refer you to the "Biasing" lecture
material from the FLUKA courses (see e.g.
https://indico.cern.ch/event/753612/contributions/3121534/attachments/1974592/3285977/Biasing_2019.pdf).

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 Fri, 30 Apr 2021, 朱雪燕 wrote:
> Dear Anna,
> 
> Thanks for your reply. What does the weight mean? If it means the physical
> weight of a source particle, then what is the unit of the weight?
> 
> Best wishes,
> Xueyan Zhu
> 
> ----------------  
> 
> 
> ---------- Origin message ----------
> >From："Anna Ferrari" <a.ferrari_at_hzdr.de>
> >To："朱雪燕" <zhu_xueyan_at_iapcm.ac.cn>, "fluka-discuss_at_fluka.org"
> <fluka-discuss_at_fluka.org>
> >Subject：Re: [fluka-discuss]: unit of dpa output by USERBIN
> >Date：2021-04-30 01:18:56
>       Dear Zhu,
>       this means that the output quantity is normalized to one primary
>       particle in your source. Moreover, if the source particle has a
>       weight
>       different from 1, this weight is taken into account.
> 
>
>       Best!
>       Anna
>
>       Am Wed, 28 Apr 2021 14:38:56 +0800 schrieb "朱雪燕" :
>       >Dear Anna,
>       >
>       >Thanks for your reply. What does "per unit primary weight"
>       mean? I don't quite understand it.
>       >
>       >Best wishes,
>       >Xueyan Zhu
>       >
>       >----------------
>       >
>       >
>       >
>       >---------- Origin message ----------
>       >>From："Anna Ferrari" <a.ferrari_at_hzdr.de>
>       >>To："朱雪燕" <zhu_xueyan_at_iapcm.ac.cn>,
>       "fluka-discuss_at_fluka.org" <fluka-discuss_at_fluka.org>
>       >>Subject：Re: [fluka-discuss]: unit of dpa output by USERBIN
>       >>Date：2021-04-27 20:26:11
>       >>Dear Xueyan Zhu,
>       >>
>       >>
>       >>   in your USRBIN output you will get the displacements per
>       atom as
>       >>average DPAs in each spatial bin, per unit primary weight (see
>       >>note 7) of the FLUKA manual for the card USRBIN).
>       >>
>       >>   Best regards,
>       >>   Anna
>       >>
>       >>Am Tue, 27 Apr 2021 14:44:26 +0800 schrieb "朱雪燕" :
>       >>>Dear experts,
>       >>>
>       >>>I want to use USERBIN to calculate the dpa distribution in a
>       material. However, I don't understand the unit of the dpa output
>       by this command. Could someone help to answer my question?
>       >>>
>       >>>Best wishes,
>       >>>Xueyan Zhu
> >>-------------------------------------------------------------------------
>       -----------
>       >>Anna Ferrari
>       >>Institute of Radiation Physics, High Energy Density Division
>       >>Helmholtz-Zentrum Dresden-Rossendorf e.V.
>       >>Bautzner Landstraße 400, D-01328 Dresden
>       >>Tel. +49 351 260 2872
>       >>http://www.hzdr.de
>       >>
>       >>
>       >>Vorstand: Prof. Dr. Sebastian M. Schmidt, Dr. Diana Stiller
>       >>Vereinsregister: VR 1693 beim Amtsgericht Dresden
>       >>
>       >
> ---------------------------------------------------------------------------
>       ---------
>       Dr. Anna Ferrari
>       Institute of Radiation Physics, High Energy Density Division
>       Helmholtz-Zentrum Dresden-Rossendorf e.V.
>       Bautzner Landstraße 400, D-01328 Dresden
>       Tel. +49 351 260 2872
>       http://www.hzdr.de
>
>       http://www.hzdr.de
>
>       Vorstand: Prof. Dr. Sebastian M. Schmidt, Dr. Ulrich Breuer
>       Vereinsregister: VR 1693 beim Amtsgericht Dresden
>        
> 
> 
>

__________________________________________________________________________
You can manage unsubscription from this mailing list at https://www.fluka.org/fluka.php?id=acc_info

Received on Thu May 27 2021 - 12:48:10 CEST