Dear Aleksandras,
You can use the SOURCE card to set user parameters (see manual for more
info).
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....
SOURCE 2.5 2.5
Particle coordinates in the source file.
* Particle coordinates
XFLK (NPFLKA) = XBEAM + (TWOTWO * FLRNDM(XDUMMY) - ONEONE)
& * WHASOU(1)
YFLK (NPFLKA) = YBEAM + (TWOTWO * FLRNDM(YDUMMY) - ONEONE)
& * WHASOU(2)
ZFLK (NPFLKA) = ZBEAM
Best regards,
Mikhail
On 19.08.2018 23:51, Ševčik Aleksandras wrote:
> Dear experts
>
> I'm still looking for the solution for this problem as it looks that it's not so straightforward to use BEAMAXES option with source.f, at least it doesn't work for me. I think maybe it is possible to define the particular size of rectangular beam shape inside the source.f, let's say 5x5 cm, so I could avoid using BEAM WHAT(3-5) parameters and could use only BEAMPOS card to align it with x axis ? How could I do this?
>
> Problem is that I have a complex voxel geometry (head) and I want to irradiate the particular spot
>
> Alex
>
> -----Original Message-----
> From: owner-fluka-discuss_at_mi.infn.it <owner-fluka-discuss_at_mi.infn.it> On Behalf Of Ševcik Aleksandras
> Sent: Tuesday, August 14, 2018 12:30
> To: Francesc Salvat-Pujol <francesc.salvat.pujol_at_cern.ch>
> Cc: fluka-discuss_at_fluka.org
> Subject: RE: [fluka-discuss]: changing beam direction in source
>
> Dear Francesc
>
> Kindly thanks for the insights. I totally forgot BEAMAXES option, have never used before. So, I guess it can be applied in this situation even without modifying the source.f ,
>
> Regards
> Alex
>
> -----Original Message-----
> From: Francesc Salvat-Pujol <francesc.salvat.pujol_at_cern.ch>
> Sent: Tuesday, August 14, 2018 10:52
> To: Ševčik Aleksandras <aleksandras.sevcik_at_ktu.edu>
> Cc: fluka-discuss_at_fluka.org
> Subject: Re: [fluka-discuss]: changing beam direction in source.f
>
> Dear Alex,
>
> I could be wrong, but you might be in a situation where Note 4 of the {BEAM} card section of the manual applies:
>
> 4) All options governed by WHAT(3,4,5) are meaningful only if the beam
> direction is along the positive z axis, unless a command BEAMAXES is
> issued to establish a beam reference frame different from the
> geometry frame (see command BEAMAXES). If the beam is not in the
> positive z direction and no BEAMAXES command has been given,
> WHAT(3)-WHAT(5) must be set = 0.0 (unpredictable effects would arise
> otherwise).
>
> I gather your beam is along x and you wanted to pass the (spatial) beam width via WHAT(4) and WHAT(5) of the BEAM card, foreseen for beams along the positive z axis instead, as per the note above in this particular scenario.
>
> You can try to set the beam direction with the TXFLK,TYFLK,TZFLK variables in source.f (mind the normalization to ONEONE).
>
> Hope this is not too far off!
>
> Cheers,
>
> Cesc
>
> On Mon, Aug 13 2018, at 20:41 +0000, Ševčik Aleksandras wrote:
>> Dear experts,
>>
>> I have this source.f (attached) routine which samples and generates rectangular beam. When I use BEAMPOS for defining various angles and starting points, I can see that it distorts the rectangular shape then. For example if I set BEAMPOS x=-110 cosx=1 to make it parallel to x axis (see attached input file) I can see that starting point of the beam does not look like rectangular one (attached jpg). If I use BEAMPOS without angular adjustment, i.e. without setting cos, and only for initial coordinates of the beam point, it works well.
>> Does this mean that angular position of the custom beam must be defined in source.f , not in BEAMPOS ? If yes, what exactly should be added in the source.f to enable the angular adjustment of the custom beam?
>> Thank you,
>> Alex
>
>
>
>
> --
> Francesc Salvat Pujol
> CERN-EN/STI
> CH-1211 Geneva 23
> Switzerland
> Tel: +41 22 76 64011
> Fax: +41 22 76 69474
> ���f�j
> ��˛���ب����b�f��)�+-j�m��?�
> 0~[�j����n��a�'Zqȧ~
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Received on Mon Aug 20 2018 - 12:15:36 CEST