Dear Francesco
Thank you for your comments, I have done a simulation again as you suggested , but except 0 degree,I still can not see something at other degrees. In addition,
I adjusted the primary electron energy to 10MeV to avoid so many photons radiated to the incidental direction of electrons. So I wonder if usryield can be used to score
the angular dose distribution or something else is not corrected. my input files and results are attached. Actually I want to study the angular dose distribution around the target.
If usryield can not do it , do you have other practical methods? Thank you very much.
Bo yang
TITLE
Hard X-ray generated by electron-Gold collisions
* yangbo 2013/10/22
* --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
DEFAULTS PRECISIO
* --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----*
BEAM -0.01 0.0 0.0 0.0 0.0 0.0ELECTRON
BEAMPOS 0.0 0.0 -0.0001 0.0 0.0
* --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----*
GEOBEGIN 0.0 COMBNAME
0 0 only scoring spheres
* --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
RPP Blabox -5000000.0 +5000000.0 -5000000.0 +5000000.0 -5000000.0 +5000000.0
RPP Vacbox -1000000.0 +1000000.0 -1000000.0 +1000000.0 -1000000.0 +1000000.0
RCC TARGET 0. 0. 0. 0. 0. 0.28 0.28
SPH BALL 0. 0. 0. 100.
END
* -reg-----or-----or-----or-----or-----or-----or-----or-----or-----or-----
BL1 5 +Blabox -Vacbox
VA2 5 +Vacbox -BALL
TC3 5 +TARGET
SP4 5 +BALL -TARGET
END
GEOEND
* --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----*
ASSIGNMA BLCKHOLE BL1
ASSIGNMA VACUUM VA2
ASSIGNMA TANTALUM TC3
ASSIGNMA VACUUM SP4
* --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----*
EMF-BIAS 1022. 0.0 0.0 TC3 TC3 0.0
EMFCUT -1.0E-5 1.0E-6 0.0 VACUUM TANTALUM PROD-CUT
EMFCUT -1.0E-5 1.0E-6 0.0 TC3 SP4
* Scoring *
* --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----*
USRYIELD 114. DOSE-EQ -64. SP4 VA2 1.Pho6
USRYIELD 0.8 0.0 5. 0.01 0.0 6.&
AUXSCORE USRYIELD PHOTON Pho6 Pho6 EWT74
* --+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----*
RANDOMIZ 1. 139.
START 1.0E8
STOP
# Detector n: 1 Pho6
# N. of x1 intervals 5
0.000000 0.1600000 11412.72 6.9665097E-02
0.1600000 0.3200000 0.000000 0.000000
0.3200000 0.4800000 0.000000 0.000000
0.4800000 0.6400000 0.000000 0.000000
0.6400000 0.8000000 0.000000 0.000000
> -----原始邮件-----
> 发件人: "Francesco Cerutti" <Francesco.Cerutti_at_cern.ch>
> 发送时间: 2015-05-03 15:00:34 (星期日)
> 收件人: "杨博" <b-yang12_at_mails.tsinghua.edu.cn>
> 抄送: "FLUKA discussion" <fluka-discuss_at_fluka.org>
> 主题: Re: [fluka-discuss]: usryield
>
>
> Dear Bo Yang,
>
> first of all you did not score dose, but photon fluence (in USRYIELD you
> asked for PHOTON). In this respect, your AUXSCORE card is meaningless,
> since there you further filter on PHOTON, which is useless, and you invoke
> a conversion coefficient set that makes sense only if associated to
> DOSE-EQ scoring, as clearly pointed out in the manual (AUXSCORE's SDUM).
>
> Now, for your 200 MeV electron beam impinging on a ~3mm tantalum target,
> the expected photon angular distribution is very forward peaked (as you
> can realize by scoring as a function of angle, using more than the
> single bin you asked for kinetic energy). Therefore it is pretty normal
> that you see something at zero deg and nothing beyond 40 deg, which is
> where you inspect with the other USRYIELD detectors.
>
> Best regards
>
> Francesco
>
> **************************************************
> Francesco Cerutti
> CERN-EN/STI
> CH-1211 Geneva 23
> Switzerland
> tel. ++41 22 7678962
> fax ++41 22 7668854
>
> On Fri, 1 May 2015, 杨博 wrote:
>
> >
> > Hi，every Fluka users
> >
> > I runned into a small question using usyield. I tried to use usyield to
> > score photon dose at different polar angles under the condition of 200MeV
> > electron hitting high-Z taregt. The result at 0 degree seems normal,but the
> > results at other angles shows 0. I double-checked my input file and did not
> > find mistake. I hope someone could help me to check my input files and give
> > me some suggestions. The input files and results are attached. Thanks in
> > advance.
> >
> >
> >
> > Bo Yang
> >
> >
> >
> >
> >
> >
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Received on Thu May 07 2015 - 07:07:53 CEST