openmc.XCone

class openmc.XCone(x0=0.0, y0=0.0, z0=0.0, r2=1.0, *args, **kwargs)[source]

A cone parallel to the x-axis of the form \((y - y_0)^2 + (z - z_0)^2 = r^2 (x - x_0)^2\).

Note

This creates a double cone, which is two one-sided cones that meet at their apex. For a one-sided cone see XConeOneSided.

Parameters
  • x0 (float, optional) – x-coordinate of the apex in [cm]. Defaults to 0.

  • y0 (float, optional) – y-coordinate of the apex in [cm]. Defaults to 0.

  • z0 (float, optional) – z-coordinate of the apex in [cm]. Defaults to 0.

  • r2 (float, optional) – Parameter related to the aperture [\(\rm cm^2\)]. It can be interpreted as the increase in the radius squared per cm along the cone’s axis of revolution.

  • boundary_type ({'transmission, 'vacuum', 'reflective', 'white'}, optional) – Boundary condition that defines the behavior for particles hitting the surface. Defaults to transmissive boundary condition where particles freely pass through the surface.

  • albedo (float, optional) – Albedo of the surfaces as a ratio of particle weight after interaction with the surface to the initial weight. Values must be positive. Only applicable if the boundary type is ‘reflective’, ‘periodic’, or ‘white’.

  • name (str, optional) – Name of the cone. If not specified, the name will be the empty string.

  • surface_id (int, optional) – Unique identifier for the surface. If not specified, an identifier will automatically be assigned.

Variables
  • x0 (float) – x-coordinate of the apex in [cm]

  • y0 (float) – y-coordinate of the apex in [cm]

  • z0 (float) – z-coordinate of the apex in [cm]

  • r2 (float) – Parameter related to the aperature

  • boundary_type ({'transmission, 'vacuum', 'reflective', 'white'}) – Boundary condition that defines the behavior for particles hitting the surface.

  • albedo (float) – Boundary albedo as a positive multiplier of particle weight

  • coefficients (dict) – Dictionary of surface coefficients

  • id (int) – Unique identifier for the surface

  • name (str) – Name of the surface

  • type (str) – Type of the surface

evaluate(point)[source]

Evaluate the surface equation at a given point.

Parameters

point (3-tuple of float) – The Cartesian coordinates, \((x',y',z')\), in [cm] at which the surface equation should be evaluated.

Returns

\(Ax'^2 + By'^2 + Cz'^2 + Dx'y' + Ey'z' + Fx'z' + Gx' + Hy' + Jz' + K = 0\)

Return type

float