/*******************************************************************************
*
* McStas, the neutron ray-tracing package.
*         Maintained by Kristian Nielsen and Kim Lefmann,
*         Copyright 2000 Risoe National Laboratory, Roskilde, Denmark
*
* %I
* Written by: Kristian Nielsen
* Date: January 2000
* Version: $Revision: 1.1.1.1 $
* Origin: McStas release
*
* Circular beam stop.
*
* %D
* A simple circular beam stop. Infinitely thin and infinitely absorbing.
*
* %P
* INPUT PARAMETERS
*
* radius: radius of the beam stop (m)
*
* %E
*******************************************************************************/

DEFINE COMPONENT Beamstop_circular
DEFINITION PARAMETERS ()
SETTING PARAMETERS (radius)
STATE PARAMETERS (x,y,z,vx,vy,vz,t,s1,s2,p)
TRACE
%{
    PROP_Z0;
    if(x*x + y*y <= radius*radius)
      ABSORB;
%}

MCDISPLAY
%{
  magnify("xy");
  circle("xy", 0, 0, 0, radius);
%}

END