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Last change
on this file since 0ed400d was
6319646,
checked in by Jae Cho <jhjcho@…>, 13 years ago
|
new includes for scale fix for P*S
|
-
Property mode set to
100644
|
File size:
1.7 KB
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Rev | Line | |
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[503a972] | 1 | #if !defined(fractal_h) |
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| 2 | #define fractal_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 sphere parameters |
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| 7 | */ |
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| 8 | //[PYTHONCLASS] = FractalModel |
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| 9 | //[DISP_PARAMS] = radius |
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| 10 | //[DESCRIPTION] =<text> The scattering intensity I(x) = P(|x|)*S(|x|) + background, where |
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| 11 | // p(x)= scale * V * delta^(2)* F(x*radius)^(2) |
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| 12 | // F(x) = 3*[sin(x)-x cos(x)]/x**3 |
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| 13 | // where delta = sldBlock -sldSolv. |
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| 14 | // scale = scale factor * Volume fraction |
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| 15 | // radius = Block radius |
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| 16 | // fractal_dim = Fractal dimension |
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| 17 | // cor_length = Correlation Length |
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| 18 | // sldBlock = SDL block |
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| 19 | // sldSolv = SDL solvent |
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| 20 | // background = background |
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| 21 | // </text> |
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| 22 | //[FIXED]= <text> radius.width </text> |
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| 23 | //[ORIENTATION_PARAMS]= <text> </text> |
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| 24 | |
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| 25 | class FractalModel{ |
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| 26 | public: |
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| 27 | // Model parameters |
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| 28 | /// Radius of gyration [A] |
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| 29 | // [DEFAULT]=radius=5.0 [A] |
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| 30 | Parameter radius; |
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| 31 | |
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| 32 | /// Scale factor |
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| 33 | // [DEFAULT]=scale= 0.05 |
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| 34 | Parameter scale; |
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| 35 | |
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| 36 | /// Fractal dimension |
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| 37 | // [DEFAULT]=fractal_dim=2.0 |
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| 38 | Parameter fractal_dim; |
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| 39 | |
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| 40 | /// Correlation Length [A] |
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| 41 | // [DEFAULT]=cor_length=100.0 [A] |
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| 42 | Parameter cor_length; |
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| 43 | |
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| 44 | /// SDL block [1/A^(2)] |
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| 45 | // [DEFAULT]=sldBlock=2.0e-6 [1/A^(2)] |
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| 46 | Parameter sldBlock; |
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| 47 | |
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| 48 | /// SDL solvent [1/A^(2)] |
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| 49 | // [DEFAULT]=sldSolv= 6.35e-6 [1/A^(2)] |
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| 50 | Parameter sldSolv; |
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| 51 | |
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| 52 | /// Incoherent Background [1/cm] |
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| 53 | // [DEFAULT]=background=0.0 [1/cm] |
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| 54 | Parameter background; |
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| 55 | |
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| 56 | // Constructor |
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| 57 | FractalModel(); |
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| 58 | |
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| 59 | // Operators to get I(Q) |
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| 60 | double operator()(double q); |
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| 61 | double operator()(double qx, double qy); |
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| 62 | double calculate_ER(); |
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[6319646] | 63 | double calculate_VR(); |
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[503a972] | 64 | double evaluate_rphi(double q, double phi); |
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| 65 | }; |
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| 66 | |
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| 67 | #endif |
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