Dear Leonel，
Thanks for your reply. But I am still confused. Please notice that the proton beam I define is a parallel beam(x width:4.0 cm,y width:4.0 cm). I want to define a parallel beam whose incident direction is x-axis negative direction. You can see the attachment. The attachment is schematic map and the target is Be target. According to my schmatic map, how can I define the parallel proton beam whose direction is x-axis negative direction? On the other hand, Is there any difference between what(4) in the BEAMPOS card and what(1) in the BEAMAXES card?
BEAM -0.008 4.0 4.0 proton
BEAMPOS -3.0 0.0 0.0 1.0 0.0
BEAMAXES -1.0 0.0 0.0 0.0 0.0 0.0
Thanks for any suggestion.
Best Regards
Chen Yuan
-----Original E-mail-----
From: "Leonel Raul Morejon Hernandez" <leonel.rmh_at_cern.ch>
Sent Time: 2014-6-3 17:55:38
To:yyc2011_at_mail.ustc.edu.cn, fluka-discuss_at_fluka.org
Cc:
Subject: Re: [fluka-discuss]: How to define a proton beam which is in the x-axis negative direction?
Dear Chen Yuan,
In Fluka the default beam direction is in the positive sense of the z-axis of the beam's reference frame. However you may change that setting in BEAMPOS card the WHAT(4) and WHAT(5) which receive the cosines of the beam direction with respect to x-axis and y-axis in the beam reference frame. In your case you have provided value 0.0 for both of them leaving the default beam direction. Then in your BEAMAXES card you are setting only the 3 first WHAT, which is incomplete, you should set them all following the link provided.
In any case, for the way you want your beam would put the following settings:
BEAM -0.008 4.0 4.0 proton
BEAMPOS -3.0 0.0 0.0 1.0 0.0
BEAMAXES -1.0 0.0 0.0 0.0 0.0 0.0
where I changed minimally your settings (changes in red). What these values mean is: the beam direction is put in the positive sense of x-axis in the beam's reference frame (card BEAMPOS in WHAT(4) ). And as you did, the x-axis of the beam reference frame is oriented in the direction of the negative sense of x-axis in the geometry reference frame thus your protons should be correctly oriented that way.
You can always check your beam settings in the output of the run (.out file).
Cheers,
Leonel
Leonel Raul Morejon Hernandez
EN-STI-EET
Tel +41 22 76 77515
Office 865/2-B15
Postbox Z06500
CERN
CH - 1211 Geneva 23
On 06/03/2014 10:55 AM, yyc2011_at_mail.ustc.edu.cn wrote:
Dear Leonel,
I am trying to define a proton beam which is in the x-axis negative direction,I set my input file like this "
BEAM -0.008 4.0 4.0 proton
BEAMPOS -3.0 0.0 0.0 0.0 0.0
BEAMAXES -1.0 0.0 0.0 "
Am I right? I am not sure.
Best Regards
Chen Yuan
-----Original E-mail-----
From: "Leonel Raul Morejon Hernandez" mailto:leonel.rmh_at_cern.ch
Sent Time: 2014-6-3 15:34:14
To: yyc2011_at_mail.ustc.edu.cn, fluka-discuss_at_fluka.org
Cc:
Subject: Re: [fluka-discuss]: How to define a proton beam which is in the x-axis negative direction?
Hi Chen Yuan,
You just need to use a BEAMAXES card. Take a look here
http://www.fluka.org/fluka.php?id=man_onl&sub=13
Cheers,
Leonel
Leonel Raul Morejon Hernandez
EN-STI-EET
Tel +41 22 76 77515
Office 865/2-B15
Postbox Z06500
CERN
CH - 1211 Geneva 23
On 06/03/2014 08:42 AM, yyc2011_at_mail.ustc.edu.cn wrote:
Dear Fluka users,
I am trying to define a proton beam which is in the x-axis negative direction. How can I do this?
Best Regards
Chen Yuan
Received on Tue Jun 03 2014 - 16:00:52 CEST