[ae3ce4e] | 1 | #if !defined(cylinder_h) |
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| 2 | #define cylinder_h |
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[af03ddd] | 3 | /** Structure definition for cylinder parameters |
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[ae3ce4e] | 4 | * [PYTHONCLASS] = CylinderModel |
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[af03ddd] | 5 | * [DISP_PARAMS] = radius, length, cyl_theta, cyl_phi |
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[4d3acb6] | 6 | [DESCRIPTION] = <text>P(q,alpha)= scale/V*f(q)^(2)+bkg |
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[70faf5d] | 7 | f(q)= 2*(scatter_sld - solvent_sld)*V |
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| 8 | *sin(qLcos(alpha/2))/[qLcos(alpha/2)] |
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| 9 | *J1(qRsin(alpha/2))/[qRsin(alpha)] |
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| 10 | V: Volume of the cylinder |
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| 11 | R: Radius of the cylinder |
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| 12 | L: Length of the cylinder |
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| 13 | J1: The bessel function |
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| 14 | alpha: angle betweenthe axis of the cylinder |
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| 15 | and the q-vector for 1D:the ouput is |
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| 16 | P(q)=scale/V*integral from pi/2 to zero of |
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| 17 | f(q)^(2)*sin(alpha)*dalpha+ bkg |
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[96672c0] | 18 | </text> |
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[25a608f5] | 19 | [FIXED]= <text>cyl_phi.width; cyl_theta.width; length.width;radius.width</text> |
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| 20 | [ORIENTATION_PARAMS]= <text>cyl_phi; cyl_theta; cyl_phi.width; cyl_theta.width</text> |
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[70faf5d] | 21 | |
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[25a608f5] | 22 | |
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[92320e5] | 23 | **/ |
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[ae3ce4e] | 24 | typedef struct { |
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[af03ddd] | 25 | /// Scale factor |
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[ae3ce4e] | 26 | // [DEFAULT]=scale=1.0 |
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| 27 | double scale; |
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[70faf5d] | 28 | /// Radius of the cylinder [Å] |
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| 29 | // [DEFAULT]=radius=20.0 [Å] |
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[ae3ce4e] | 30 | double radius; |
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[70faf5d] | 31 | /// Length of the cylinder [Å] |
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| 32 | // [DEFAULT]=length=400.0 [Å] |
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[ae3ce4e] | 33 | double length; |
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[70faf5d] | 34 | /// Contrast [1/Ų] |
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| 35 | // [DEFAULT]=contrast=3.0e-6 [1/Ų] |
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[ae3ce4e] | 36 | double contrast; |
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[70faf5d] | 37 | /// Incoherent Background [1/cm] 0.00 |
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| 38 | // [DEFAULT]=background=0.0 [1/cm] |
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[af03ddd] | 39 | double background; |
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[ae3ce4e] | 40 | /// Orientation of the cylinder axis w/respect incoming beam [rad] |
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[70faf5d] | 41 | // [DEFAULT]=cyl_theta=1.0 [rad] |
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[ae3ce4e] | 42 | double cyl_theta; |
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| 43 | /// Orientation of the cylinder in the plane of the detector [rad] |
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[70faf5d] | 44 | // [DEFAULT]=cyl_phi=1.0 [rad] |
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[af03ddd] | 45 | double cyl_phi; |
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[70faf5d] | 46 | |
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[ae3ce4e] | 47 | } CylinderParameters; |
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| 48 | |
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| 49 | |
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| 50 | |
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| 51 | /// 1D scattering function |
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| 52 | double cylinder_analytical_1D(CylinderParameters *pars, double q); |
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| 53 | |
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| 54 | /// 2D scattering function |
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| 55 | double cylinder_analytical_2D(CylinderParameters *pars, double q, double phi); |
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| 56 | double cylinder_analytical_2DXY(CylinderParameters *pars, double qx, double qy); |
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| 57 | double cylinder_analytical_2D_scaled(CylinderParameters *pars, double q, double q_x, double q_y); |
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| 58 | |
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| 59 | #endif |
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