Re: [fluka-discuss]: USRBIN Rotation

From: Yuri Simeonov <yuri.simeonov_at_gmail.com>
Date: Thu, 14 Apr 2016 19:25:34 +0200

Dear Mikhail,

thanks for your answer! I used your .inp file for some simulations.

Somehow I was thinking that if I rotate my whole set up (particle
direction, water phantom and USRBIN ) with the same angle around the same
point I will get the same results independent of the rotation angle (This
is what I need, is this possible in FLUKA at all?), but this is not the
case (see the attached Pictures).
Apparently I misunderstand the whole concept of rotation in this case?

Regards
Yuri


2016-04-13 22:10 GMT+02:00 Mikhail Polkovnikov <Михаил Полковников> <
pmk_at_ihep.ru>:

> On 13.04.2016 19:01, Yuri Simeonov wrote:
>
>> Dear FLUKA Experts,
>>
>> I have a very simple test geometry, just scoring the dose from H1
>> primaries in a water phantom (parallel 5cm broad beam starting at z=0)
>>
>> Then I rotated the water phantom (Rotation is apparently around the 0,0,0
>> Origin) and this worked fine.
>>
>> Then I tried to apply the same rotation to my X-Y-Z USRBIN expecting it
>> to also rotate "geometrically". But it seems like my USRBIN is staying
>> geometrically on the same place and the rotation is applied to the beam
>> particles. Can you confirm this?
>>
>> My final idea is actually to rotate the primary particles with e.g. 5
>> degrees (around the X axis), apply the same rotation to the water phantom
>> and the USRBIN and score exactly the same Bragg Peak as if I havn't rotated
>> anything. Is this possible at all?
>>
>> The reason why I want to rotate my whole setup is because I have an STL
>> File (triangulated mesh) implemented in Fluka, which I don't want to rotate.
>>
>> Regards
>> Yuri
>>
>>
>>
> Dear Yuri,
>
> You have to use ROTPRBIN card to rotate USRBIN. It's the same principle
> when you rotate (transform) bodies in geometry.
>
> Best regards,
> Mikhail
>



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Received on Thu Apr 14 2016 - 21:07:46 CEST