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Last change
on this file since fb3f9af was
79492222,
checked in by krzywon, 10 years ago
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Changed the file and folder names to remove all SANS references.
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-
Property mode set to
100644
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File size:
1.7 KB
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[08648c0] | 1 | #if !defined(surfacefractal_h) |
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| 2 | #define surfacefractal_h |
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| 3 | #include "parameters.hh" |
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| 4 | |
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| 5 | /** |
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| 6 | * Structure definition for parameters |
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| 7 | */ |
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| 8 | //[PYTHONCLASS] = SurfaceFractalModel |
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| 9 | //[DESCRIPTION] =<text> The scattering intensity I(x) = scale*P(x)*S(x) + background, where |
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| 10 | // scale = scale_factor * V * delta^(2) |
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| 11 | // p(x)= F(x*radius)^(2) |
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| 12 | // F(x) = 3*[sin(x)-x cos(x)]/x**3 |
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| 13 | // S(x) = [(gamma(5-Ds)*colength^(5-Ds)*[1+(x^2*colength^2)]^((Ds-5)/2) |
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| 14 | // * sin[(Ds-5)*arctan(x*colength)])/x] |
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| 15 | // where delta = sldParticle -sldSolv. |
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| 16 | // radius = Particle radius |
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| 17 | // surface_dim = Surface fractal dimension (Ds) |
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| 18 | // co_length = Cut-off length |
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| 19 | // background = background |
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| 20 | // Ref.:Mildner, Hall,J Phys D Appl Phys(1986), 19, 1535-1545 |
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| 21 | // Note I: This model is valid for 1<surface_dim<3 with limited q range. |
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| 22 | // Note II: This model is not in absolute scale. |
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| 23 | // </text> |
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| 24 | //[ORIENTATION_PARAMS]= <text> </text> |
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| 25 | |
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| 26 | class SurfaceFractalModel{ |
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| 27 | public: |
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| 28 | // Model parameters |
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| 29 | /// Scale factor |
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| 30 | // [DEFAULT]=scale= 1.0 |
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| 31 | Parameter scale; |
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| 32 | |
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| 33 | /// Radius [A] |
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| 34 | // [DEFAULT]=radius=10.0 [A] |
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| 35 | Parameter radius; |
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| 36 | |
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| 37 | /// Surface fractal dimension |
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| 38 | // [DEFAULT]=surface_dim=2.0 |
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| 39 | Parameter surface_dim; |
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| 40 | |
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| 41 | /// Cut-off Length [A] |
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| 42 | // [DEFAULT]=co_length=500.0 [A] |
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| 43 | Parameter co_length; |
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| 44 | |
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[6319646] | 45 | /// Incoherent Background |
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| 46 | // [DEFAULT]=background=0.0 |
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[08648c0] | 47 | Parameter background; |
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| 48 | |
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| 49 | // Constructor |
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| 50 | SurfaceFractalModel(); |
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| 51 | |
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| 52 | // Operators to get I(Q) |
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| 53 | double operator()(double q); |
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| 54 | double operator()(double qx, double qy); |
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| 55 | double calculate_ER(); |
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[6319646] | 56 | double calculate_VR(); |
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[08648c0] | 57 | double evaluate_rphi(double q, double phi); |
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| 58 | }; |
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| 59 | |
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| 60 | #endif |
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