source: sasview/src/sas/models/include/ellipsoid.h @ 79492222

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Last change on this file since 79492222 was 79492222, checked in by krzywon, 8 years ago

Changed the file and folder names to remove all SANS references.

  • Property mode set to 100644
File size: 2.3 KB
Line 
1#if !defined(ellipsoid_h)
2#define ellipsoid_h
3#include "parameters.hh"
4
5/**
6 * Structure definition for ellipsoid parameters
7 * The ellipsoid has axes radius_b, radius_b, radius_a.
8 * Ref: Jan Skov Pedersen, Advances in Colloid and Interface Science, 70 (1997) 171-210
9 */
10//[PYTHONCLASS] = EllipsoidModel
11//[DISP_PARAMS] = radius_a, radius_b, axis_theta, axis_phi
12//[DESCRIPTION] = <text>"P(q.alpha)= scale*f(q)^(2)+ bkg, where f(q)= 3*(sld_ell
13//              - sld_solvent)*V*[sin(q*r(Ra,Rb,alpha))
14//              -q*r*cos(qr(Ra,Rb,alpha))]
15//              /[qr(Ra,Rb,alpha)]^(3)"
16//
17//     r(Ra,Rb,alpha)= [Rb^(2)*(sin(alpha))^(2)
18//     + Ra^(2)*(cos(alpha))^(2)]^(1/2)
19//
20//              scatter_sld: SLD of the scatter
21//              solvent_sld: SLD of the solvent
22//     sldEll: SLD of ellipsoid
23//              sldSolv: SLD of solvent
24//              V: volune of the Eliipsoid
25//              Ra: radius along the rotation axis
26//              of the Ellipsoid
27//              Rb: radius perpendicular to the
28//              rotation axis of the ellipsoid
29//              </text>
30//[FIXED]= <text> axis_phi.width; axis_theta.width;radius_a.width;
31//radius_b.width; length.width; r_minor.width;
32//r_ratio.width</text>
33//[ORIENTATION_PARAMS]=  axis_phi.width; axis_theta.width;axis_phi; axis_theta
34
35class EllipsoidModel{
36public:
37  // Model parameters
38  /// Rotation axis radius_a [A]
39  //  [DEFAULT]=radius_a=20.0 [A]
40  Parameter radius_a;
41
42  /// Scale factor
43  //  [DEFAULT]=scale=1.0
44  Parameter scale;
45
46  /// Radius_b [A]
47  //  [DEFAULT]=radius_b=400 [A]
48  Parameter radius_b;
49
50  /// sldEll [1/A^(2)]
51  //  [DEFAULT]=sldEll=4.0e-6 [1/A^(2)]
52  Parameter sldEll;
53
54  /// sld of solvent [1/A^(2)]
55  //  [DEFAULT]=sldSolv=1.0e-6 [1/A^(2)]
56  Parameter sldSolv;
57
58  /// Incoherent Background [1/cm]
59  //  [DEFAULT]=background=0 [1/cm]
60  Parameter background;
61
62  /// Orientation of the long axis of the ellipsoid w/respect incoming beam [deg]
63  //  [DEFAULT]=axis_theta=90.0 [deg]
64  Parameter axis_theta;
65  /// Orientation of the long axis of the ellipsoid in the plane of the detector [deg]
66  //  [DEFAULT]=axis_phi=0.0 [deg]
67  Parameter axis_phi;
68
69  // Constructor
70  EllipsoidModel();
71
72  // Operators to get I(Q)
73  double operator()(double q);
74  double operator()(double qx, double qy);
75  double calculate_ER();
76  double calculate_VR();
77  double evaluate_rphi(double q, double phi);
78};
79
80
81#endif
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