Re: Re: [fluka-discuss]: source-sample from FLNRR2

From: <me_at_marychin.org>
Date: Mon, 19 May 2014 21:18:09 -0700 (PDT)

Dear 渊林,

FLNRR2 simply returns two random numbers sampled from Gaussian distribution.
That is, if we simply get source.f to print out the values of R GAUS1 and
RGAUS2, we then plot histograms of RGAUS1 and RGAUS2, we will find two happy
Gaussian curves, each with the respective sigma. FLNRR2 is embedded in the
binary libraries in the public distribution, therefore not so much for 'seeing'
as such...

:) mary

> On 19 May 2014 at 18:36 闫渊林 <yanyuanlin_at_impcas.ac.cn> wrote:
>
> Dear mary,
>
> Thank you for your reply!
> You said that :XFLK(NPFLKA) = RGAUS1*WHASOU(1),I guess that WHASOU(1) is a
> sigma value which can be setted,but what dose RGAUS1 indicate.Where can I see
> the subroutine FLNRR2.
>
> Best Wish!
> Yanyuanlin
>
>
>
> > -----原始邮件-----
> > 发件人: "me_at_marychin.org" <me_at_marychin.org>
> > 发送时间: 2014年5月20日 星期二
> > 收件人: fluka-discuss_at_fluka.org, "\"闫渊林\"" <yanyuanlin_at_impcas.ac.cn>
> > 抄送:
> > 主题: Re: [fluka-discuss]: source-sample from FLNRR2
> >
> > Hi again 闫渊林,
> >
> > For the sake of completeness, here I follow with a cookbook example.
> >
> > In source.f:
> > CALL FLNRR2 (RGAUS1,RGAUS2)
> > XFLK(NPFLKA) = RGAUS1*WHASOU(1)
> > YFLK(NPFLKA) = RGAUS2*WHASOU(2)
> > where WHASOU(1) and WHASOU(2) are user-supplied via the SOURCE card.
> >
> > The above will correspond to BEAM card
> > WHAT(4) = -WHASOU(1)*2.355
> > WHAT(5) = -WHASOU(2)*2.355
> > because
> > * WHAT(4) and WHAT(5), when preceded by a minus sign, are the FWHM, and
> > that
> > FWHM = 2.3548 sigma.
> >
> > :) mary
> >
> > > On 19 May 2014 at 07:02 闫渊林 <yanyuanlin_at_impcas.ac.cn> wrote:
> > >
> > >
> > >
> > > Dear FLUKA experts，
> > >
> > > I'm simulating a beam with source.f. If sample from FLNRR2, how to set
> > > the
> > >Gaussian distribution FWHM like the card BEAM. Thank you!
> > >
> > > Best Wish!
> > > Yanyuanlin
> > >
> > >
> > >
> > >
> >
> >
>
>
>
>
Received on Tue May 20 2014 - 07:48:33 CEST