Dear Bo Yang,
indeed you met a USRYIELD bug: asking in the same input to score as a
function of the polar angle (which is defined wrt the beam axis) and to
score fluence (which implies the calculation of the angle wrt the normal
to the scoring surface) jeopardizes the USRYIELD results, since in fact
only one of the two different angles is calculated for scoring purposes.
So, for the time being, in order to see your photon angular distribution,
just ask for photon current (d2N/dx1dx2) and remove the USRYIELD cards
asking for fluence (d2N/dx1dx2cos(theta)). While you figure out your
PHOTON field with USRYIELD, you can score DOSE-EQ (which I understand is
what you are interested in) with USRBIN, getting its spatial distribution.
Cheers
Francesco
**************************************************
Francesco Cerutti
CERN-EN/STI
CH-1211 Geneva 23
Switzerland
tel. ++41 22 7678962
fax ++41 22 7668854
On Thu, 7 May 2015, 杨博 wrote:
> 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 Tue May 26 2015 - 00:27:38 CEST