[ Identification | Description | Input parameters | Links ]

The `SasView_model` Component

Identification

Site:
Author: Jakob Garde, Torben Nielsen, Peter Willendrup
Origin: SasView, DTU, European Spallation Source ERIC
Date: 03.02.2016

Description

Sample for use in SANS instruments. The models describe mono disperse particles in thin solution. The sample geometry may have the shape:

Shape:        - A filled box with dimensions xwidth, yheight and zdepth.
- A cylinder with dimensions radius and yheight.
- A filled sphere given by radius.

These parameters are mutually exclusive.

Example using spheres in thin solution, with radius=200 AA and a delta_sld=0.6 fm/AA^3:
SasView_model(model_index=47, model_scale=1.0, model_pars={1, 7, 200}, model_abs=0.0,
xwidth=0.01, yheight=0.01, zdepth=0.005,)


The algorithm of this component requires use of the ISO C standard c99. You could use MCXTRACE_CFLAGS like MCXTRACE_CFLAGS = -std=c99 -g -O2 -lm.
Or, add the flag "-std=c99" to "C flags" in the mcgui or mcgui-py config.

The list of scattering models in SasView is called sasmodels. The list of McXtrace available SasView sasmodels are found in the table below.

A few models may require manual documentation lookup using the above link to the SasView site.

McXtrace does currently not support multiplication of formfactor models with structure factor models.

The 2D scattering scattering kernels are denoted by modelname_xy. I.e. to evalulate scattering from aligned cylinders use model_index=10 to use cylinder_xy.

MDOC

Model no. Model name Parameters
 0 None None
 1 barbell (sld, solvent_sld, bell_radius, radius, length)
 2 barbell_xy (sld, solvent_sld, bell_radius, radius, length, theta, phi)
 3 bcc_paracrystal (dnn, d_factor, radius, sld, solvent_sld)
 4 bcc_paracrystal_xy (dnn, d_factor, radius, sld, solvent_sld, theta, phi, psi)
 5 capped_cylinder (sld, solvent_sld, radius, cap_radius, length)
 6 capped_cylinder_xy (sld, solvent_sld, radius, cap_radius, length, theta, phi)
 7 core_shell_cylinder (core_sld, shell_sld, solvent_sld, radius, thickness, length)
 8 core_shell_cylinder_xy (core_sld, shell_sld, solvent_sld, radius, thickness, length, theta, phi)
 9 cylinder (sld, solvent_sld, radius, length)
10 cylinder_xy (sld, solvent_sld, radius, length, theta, phi)
11 dab (length)
12 dab_xy (length)
13 ellipsoid (sld, solvent_sld, rpolar, requatorial)
14 ellipsoid_xy (sld, solvent_sld, rpolar, requatorial, theta, phi)
15 fcc_paracrystal (dnn, d_factor, radius, sld, solvent_sld)
16 fcc_paracrystal_xy (dnn, d_factor, radius, sld, solvent_sld, theta, phi, psi)
17 flexible_cylinder_ex (length, kuhn_length, radius, axis_ratio, sld, solvent_sld)
18 flexible_cylinder_ex_xy (length, kuhn_length, radius, axis_ratio, sld, solvent_sld)
19 gaussian_peak (q0, sigma)
20 gaussian_peak_xy (q0, sigma)
21 guinier (rg)
22 guinier_xy (rg)
23 hardsphere (effect_radius, volfraction)
24 hardsphere_xy (effect_radius, volfraction)
25 HayterMSAsq (effect_radius, zz, VolFrac, Temp, csalt, dialec)
26 HayterMSAsq_xy (effect_radius, charge, volfraction, temperature, saltconc, dielectconst)
27 hollow_cylinder (radius, core_radius, length, sld, solvent_sld)
28 hollow_cylinder_xy (radius, core_radius, length, sld, solvent_sld, theta, phi)
29 lamellar (sld, solvent_sld, thickness)
30 lamellar_xy (sld, solvent_sld, thickness)
31 lamellar_FFHG (tail_length, head_length, sld, head_sld, solvent_sld)
32 lamellar_FFHG_xy (tail_length, head_length, sld, head_sld, solvent_sld)
33 lamellarCailleHG (tail_length, head_length, Nlayers, dd, Cp, tail_sld, head_sld, solvent_sld)
34 lamellarCailleHG_xy (tail_length, head_length, Nlayers, spacing, Caille_parameter, sld, head_sld, solvent_sld)
35 lamellarPC (th, Nlayers, davg, pd, sld, solvent_sld)
36 lamellarPC_xy (thickness, Nlayers, spacing, spacing_polydisp, sld, solvent_sld)
37 lamellarPS (del, Nlayers, dd, Cp, sld, solvent_sld)
38 lamellarPS_xy (thickness, Nlayers, spacing, Caille_parameter, sld, solvent_sld)
39 linear_pearls (radius, edge_sep, num_pearls, pearl_sld, solvent_sld)
40 linear_pearls_xy (radius, edge_sep, num_pearls, pearl_sld, solvent_sld)
41 lorentz (cor_length)
42 lorentz_xy (cor_length)
43 mass_fractal (radius, mass_dim, cutoff_length)
44 mass_fractal_xy (radius, mass_dim, cutoff_length)
45 mass_surface_fractal (mass_dim, surface_dim, cluster_rg, primary_rg)
46 mass_surface_fractal_xy (mass_dim, surface_dim, cluster_rg, primary_rg)
47 parallelepiped (sld, solvent_sld, a_side, b_side, c_side)
48 parallelepiped_xy (sld, solvent_sld, a_side, b_side, c_side, theta, phi, psi)
49 pearl_necklace (radius, edge_separation, string_thickness, number_of_pearls, sld, string_sld, solvent_sld)
50 pearl_necklace_xy (radius, edge_separation, string_thickness, number_of_pearls, sld, string_sld, solvent_sld)
51 sphere (sld, solvent_sld, radius)
52 sphere_xy (sld, solvent_sld, radius)
53 star_polymer (radius2, arms)
54 star_polymer_xy (radius2, arms)
55 stickyhardsphere (effect_radius, volfraction, perturb, stickiness)
56 stickyhardsphere_xy (effect_radius, volfraction, perturb, stickiness)
57 triaxial_ellipsoid (sld, solvent_sld, req_minor, req_major, rpolar)
58 triaxial_ellipsoid_xy (sld, solvent_sld, req_minor, req_major, rpolar, theta, phi, psi)




Available SasView sasmodels - Extended parameters description



sasmodels name
Parameters 
Units
Range


barbell
 { 4, 1, 40, 20, 400 }
 
 


barbell_xy
 { 4, 1, 40, 20, 400, 60, 60 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Barbell scattering length density
4e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
Spherical bell radius
Ang
[0, inf]


 
Cylindrical bar radius
Ang
[0, inf]


 
Cylinder bar length
Ang
[0, inf]


 
In plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
 
 
 


bcc
 { 220, 0.06, 40, 4, 1 }
 
 


bcc_xy
 { 220, 0.06, 40, 4, 1, 60, 60, 60 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Nearest neighbour distance
Ang
[-inf, inf]


 
Paracrystal distortion factor
 
[-inf, inf]


 
Particle radius
Ang
[0, inf]


 
Particle scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
In plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
 
 
 


capped_cylinder
 { 4, 1, 20, 20, 400 }
 
 


capped_cylinder_xy
 { 4, 1, 20, 20, 400, 60, 60 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Cylinder scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
Cylinder radius
Ang
[0, inf]


 
Cap radius
Ang
[0, inf]


 
Cylinder length
Ang
[0, inf]


 
In plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
 
 
 


core_shell_cylinder
 { 4, 4, 1, 20, 20, 400 }
 
 


core_shell_cylinder_xy
 { 4, 4, 1, 20, 20, 400, 60, 60 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Cylinder core scattering length density
1e-6/Ang^2
[-inf, inf]


 
Cylinder shell scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
Cylinder core radius
Ang
[0, inf]


 
Cylinder shell thickness
Ang
[0, inf]


 
Cylinder length
Ang
[0, inf]


 
In plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
 
 
 


cylinder
 { 4, 1, 20, 400 }
 
 


cylinder_xy
 { 4, 1, 20, 400, 60, 60 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Cylinder scattering length density
4e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
Cylinder radius
Ang
[0, inf]


 
Cylinder length
Ang
[0, inf]


 
In plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
 
 
 


dab
 { 50.0 }
 
 


dab_xy
 { 50.0 }
 
 


 
 
 
 


 
Parameters:
 
 


 
correlation length
Ang
[0, inf]


 
 
 
 


ellipsoid
 { 4, 1, 20, 400 }
 
 


ellipsoid_xy
 { 4, 1, 20, 400, 60, 60 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Ellipsoid scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
Polar radius
Ang
[0, inf]


 
Equatorial radius
Ang
[0, inf]


 
In plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
 
 
 


fcc
 { 220, 0.06, 40, 4, 1 }
 
 


fcc_xy
 { 220, 0.06, 40, 4, 1, 60, 60, 60 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Nearest neighbour distance
Ang
[-inf, inf]


 
Paracrystal distortion factor
 
[-inf, inf]


 
Particle radius
Ang
[0, inf]


 
Particle scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
In plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
 
 
 


flexible_cylinder_ex
 { 1000.0, 100.0, 20.0, 1.5, 1.0, 6.3 }
 
 


flexible_cylinder_ex_xy
 { 1000.0, 100.0, 20.0, 1.5, 1.0, 6.3 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Length of the flexible cylinder
Ang
[0, inf]


 
Kuhn length of the flexible cylinder
Ang
[0, inf]


 
Radius of the flexible cylinder
Ang
[0, inf]


 
Axis_ratio (major_radius/radius
 
[0, inf]


 
Cylinder scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
 
 
 


gaussian_peak
 { 0.05, 0.005 }
 
 


gaussian_peak_xy
 { 0.05, 0.005 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Peak position
1/Ang
[-inf, inf]


 
Peak width (standard deviation)
1/Ang
[0, inf]


 
 
 
 


guinier
 { 60.0 }
 
 


guinier_xy
 { 60.0 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Radius of Gyration
Ang
[0, inf]


 
 
 
 


hardsphere
 { 50.0, 0.2 }
 
 


hardsphere_xy
 { 50.0, 0.2 }
 
 


 
 
 
 


 
Parameters:
 
 


 
effective radius of hard sphere
Ang
[0, inf]


 
volume fraction of hard spheres
 
[0, 0.74]


 
 
 
 


HayterMSAsq
 { 20.75, 19.0, 0.0192, 318.16, 0.0, 71.08 }
 
 


HayterMSAsq_xy
 { 20.75, 19.0, 0.0192, 318.16, 0.0, 71.08 }
 
 


 
 
 
 


 
Parameters:
 
 


 
effective radius of hard sphere
Ang
[0, inf]


 
charge on sphere (in electrons)
e
[0, inf]


 
volume fraction of spheres
 
[0, 0.74]


 
temperature, in Kelvin, for Debye length calculation
K
[0, inf]


 
conc of salt, 1:1 electolyte, for Debye length
M
[-inf, inf]


 
dielectric constant of solvent (default water), for Debye length
 
[-inf, inf]


 
 
 
 


hollow_cylinder
 { 30.0, 20.0, 400.0, 6.3, 1 }
 
 


hollow_cylinder_xy
 { 30.0, 20.0, 400.0, 6.3, 1, 90, 0 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Cylinder radius
Ang
[0, inf]


 
Hollow core radius
Ang
[0, inf]


 
Cylinder length
Ang
[0, inf]


 
Cylinder sld
1/Ang^2
[-inf, inf]


 
Solvent sld
1/Ang^2
[-inf, inf]


 
Theta angle
degrees
[-360, 360]


 
Phi angle
degrees
[-360, 360]


 
 
 
 


lamellar
 { 1, 6, 50 }
 
 


lamellar_xy
 { 1, 6, 50 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Layer scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
Bilayer thickness
Ang
[0, inf]


 
 
 
 


lamellarCaille
 { 30.0, 20, 400.0, 0.1, 6.3, 1.0 }
 
 


lamellarCaille_xy
 { 30.0, 20, 400.0, 0.1, 6.3, 1.0 }
 
 


 
 
 
 


 
Parameters:
 
 


 
sheet thickness
Ang
[0, inf]


 
Number of layers
 
[0, inf]


 
d-spacing of Caille S(Q)
Ang
[0.0, inf]


 
Caille parameter
1/Ang^2
[0.0, 0.8]


 
layer scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
 
 
 


lamellarCailleHG
 { 10, 2, 30, 40.0, 0.001, 0.4, 2.0, 6 }
 
 


lamellarCailleHG_xy
 { 10, 2, 30, 40.0, 0.001, 0.4, 2.0, 6 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Tail thickness
Ang
[0, inf]


 
head thickness
Ang
[0, inf]


 
Number of layers
 
[0, inf]


 
d-spacing of Caille S(Q)
Ang
[0.0, inf]


 
Caille parameter
 
[0.0, 0.8]


 
Tail scattering length density
1e-6/Ang^2
[-inf, inf]


 
Head scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
 
 
 


lamellarFFHG
 { 15, 10, 0.4, 3.0, 6 }
 
 


lamellarFFHG_xy
 { 15, 10, 0.4, 3.0, 6 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Tail thickness
Ang
[0, inf]


 
head thickness
Ang
[0, inf]


 
Tail scattering length density
1e-6/Ang^2
[-inf, inf]


 
Head scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
 
 
 


lamellarPC
 { 33.0, 20, 250.0, 0.0, 1.0, 6.34 }
 
 


lamellarPC_xy
 { 33.0, 20, 250.0, 0.0, 1.0, 6.34 }
 
 


 
 
 
 


 
Parameters:
 
 


 
sheet thickness
Ang
[0, inf]


 
Number of layers
 
[0, inf]


 
d-spacing of paracrystal stack
Ang
[0.0, inf]


 
d-spacing polydispersity
Ang
[0.0, inf]


 
layer scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
 
 
 


linear_pearls
 { 80.0, 350.0, 3.0, 1.0, 6.3 }
 
 


linear_pearls_xy
 { 80.0, 350.0, 3.0, 1.0, 6.3 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Radius of the pearls
Ang
[0, inf]


 
Length of the string segment - surface to surface
Ang
[0, inf]


 
Number of the pearls
 
[0, inf]


 
SLD of the pearl spheres
1e-6/Ang^2
[-inf, inf]


 
SLD of the solvent
1e-6/Ang^2
[-inf, inf]


 
 
 
 


lorentz
 { 50.0 }
 
 


lorentz_xy
 { 50.0 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Screening length
Ang
[0, inf]


 
 
 
 


mass_fractal
 { 10.0, 1.9, 100.0 }
 
 


mass_fractal_xy
 { 10.0, 1.9, 100.0 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Particle radius
Ang
[0.0, inf]


 
Mass fractal dimension
 
[1.0, 6.0]


 
Cut-off length
Ang
[0.0, inf]


 
 
 
 


mass_surface_fractal
 { 1.8, 2.3, 86.7, 4000.0 }
 
 


mass_surface_fractal_xy
 { 1.8, 2.3, 86.7, 4000.0 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Mass fractal dimension
 
[1e-16, 6.0]


 
Surface fractal dimension
 
[1e-16, 6.0]


 
Cluster radius of gyration
Ang
[0.0, inf]


 
Primary particle radius of gyration
Ang
[0.0, inf]


 
 
 
 


parallelepiped
 { 4, 1, 35, 75, 400 }
 
 


parallelepiped_xy
 { 4, 1, 35, 75, 400, 60, 60, 60 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Parallelepiped scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
Shorter side of the parallelepiped
Ang
[0, inf]


 
Second side of the parallelepiped
Ang
[0, inf]


 
Larger side of the parallelepiped
Ang
[0, inf]


 
In plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
Rotation angle around its own c axis against q plane
degrees
[-inf, inf]


 
 
 
 


pearl_necklace
 { 80.0, 350.0, 2.5, 3, 1.0, 1.0, 6.3 }
 
 


pearl_necklace_xy
 { 80.0, 350.0, 2.5, 3, 1.0, 1.0, 6.3 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Mean radius of the chained spheres
Angstrom
[0, inf]


 
Mean separation of chained particles
Angstrom
[0, inf]


 
Thickness of the chain linkage
Angstrom
[0, inf]


 
Mean number of pearls in each necklace
none
[0, inf]


 
Scattering length density of the chained spheres
Angstrom^2
[-inf, inf]


 
Scattering length density of the chain linkage
Angstrom^2
[-inf, inf]


 
Scattering length density of the solvent
Angstrom^2
[-inf, inf]


 
 
 
 


sphere
 { 1, 6, 50 }
 
 


sphere_xy
 { 1, 6, 50 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Layer scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
Sphere radius
Ang
[0, inf]


 
 
 
 


star_polymer
 { 100.0, 3 }
 
 


star_polymer_xy
 { 100.0, 3 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Ensemble radius of gyration squared of an arm
Ang
[0.0, inf]


 
Number of arms in the model
 
[1.0, 6.0]


 
 
 
 


stickyhardsphere
 { 50.0, 0.2, 0.05, 0.2 }
 
 


stickyhardsphere_xy
 { 50.0, 0.2, 0.05, 0.2 }
 
 


 
 
 
 


 
Parameters:
 
 


 
effective radius of hard sphere
Ang
[0, inf]


 
volume fraction of hard spheres
 
[0, 0.74]


 
perturbation parameter, epsilon
 
[0.01, 0.1]


 
stickiness, tau
 
[-inf, inf]


 
 
 
 


triaxial_ellipsoid
 { 4, 1, 20, 400, 10 }
 
 


triaxial_ellipsoid_xy
 { 4, 1, 20, 400, 10, 60, 60, 60 }
 
 


 
 
 
 


 
Parameters:
 
 


 
Ellipsoid scattering length density
1e-6/Ang^2
[-inf, inf]


 
Solvent scattering length density
1e-6/Ang^2
[-inf, inf]


 
Minor equitorial radius
Ang
[0, inf]


 
Major equatorial radius
Ang
[0, inf]


 
Polar radius
Ang
[0, inf]


 
In plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
Out of plane angle
degrees
[-inf, inf]


 
 
 
 


 
 
Name convention: SasView  - sasmodels 



SasView name
sasmodels name 
P(Q) 
S(Q)
Multiply
Multiplicity


BarBell
barbell 
- 
 - 
-
-


BCCrystal
bcc 
- 
 - 
-
-


CappedCylinder
capped_cylinder 
- 
 - 
-
-


CoreShellCylinder
core_shell_cylinder 
- 
 - 
-
-


Cylinder
cylinder 
- 
 - 
-
-


DAB
dab 
- 
 - 
-
-


Ellipsoid
ellipsoid 
- 
 - 
-
-


FCCrystal
fcc 
- 
 - 
-
-


FlexCylEllipX
flexible_cylinder_ex 
- 
 - 
-
-


PeakGauss
gaussian_peak 
- 
 - 
-
-


Guinier
guinier 
- 
 - 
-
-


HardsphereStructure
hardsphere 
- 
 Y 
-
-


HayterMSAStructure
HayterMSAsq 
- 
 Y 
-
-


HollowCylinder
hollow_cylinder 
- 
 - 
-
-


Lamellar
lamellar 
- 
 - 
-
-


LamellarPS
lamellarCaille 
- 
 - 
-
-


LamellarPSHG
lamellarCailleHG 
- 
 - 
-
-


LamellarFFHG
lamellarFFHG 
- 
 - 
-
-


LamellarPCrystal
lamellarPC 
- 
 - 
-
-


LinearPearls
linear_pearls 
- 
 - 
-
-


Lorentz
lorentz 
- 
 - 
-
-


MassFractal
mass_fractal 
- 
 - 
-
-


MassSurfaceFractal
mass_surface_fractal 
- 
 - 
-
-


Parallelepiped
parallelepiped 
- 
 - 
-
-


PearlNecklace
pearl_necklace 
- 
 - 
-
-


Sphere
sphere 
- 
 - 
-
-


StarPolymer
star_polymer 
- 
 - 
-
-


StickyHSStructure
stickyhardsphere 
- 
 Y 
-
-


TriaxialEllipsoid
triaxial_ellipsoid 
- 
 - 
-
-




MDOC_END

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
model_index		Index of the applied sasview model. Recompile instrument for changes to take effect.	21
model_scale		Global scale factor for scattering kernel. For systems without inter-particle interference, the form factors can be related	1.0
model_pars		Model parameters are given as a set of comma-separated values enclosed by {}, e.g. {60} for the model index 21 (the guinier model).	{60}
xwidth		horiz. dimension of sample, as a width (m)	0
yheight		vert . dimension of sample, as a height for cylinder/box (m)	0
zdepth		depth of sample (m)	0
radius		Outer radius of sample in (x,z) plane for cylinder/sphere [m]	0
target_x		-\	0
target_y		3- relative focus target position [m]	0
target_z		-/	6
target_index		Relative index of component to focus at, e.g. next is +1 [1]	0
focus_xw		horiz. dimension of a rectangular area [m]	0
focus_yh		vert. dimension of a rectangular area [m]	0
focus_aw		horiz. angular dimension of a rectangular area [deg]	0
focus_ah		vert. angular dimension of a rectangular area [deg]	0
focus_r		Detector (disk-shaped) radius (m)	0

AT (	,	,		) RELATIVE
ROTATED (	,	,		) RELATIVE

Model no.	Model name	Parameters
0	None	None
1	barbell	(sld, solvent_sld, bell_radius, radius, length)
2	barbell_xy	(sld, solvent_sld, bell_radius, radius, length, theta, phi)
3	bcc_paracrystal	(dnn, d_factor, radius, sld, solvent_sld)
4	bcc_paracrystal_xy	(dnn, d_factor, radius, sld, solvent_sld, theta, phi, psi)
5	capped_cylinder	(sld, solvent_sld, radius, cap_radius, length)
6	capped_cylinder_xy	(sld, solvent_sld, radius, cap_radius, length, theta, phi)
7	core_shell_cylinder	(core_sld, shell_sld, solvent_sld, radius, thickness, length)
8	core_shell_cylinder_xy	(core_sld, shell_sld, solvent_sld, radius, thickness, length, theta, phi)
9	cylinder	(sld, solvent_sld, radius, length)
10	cylinder_xy	(sld, solvent_sld, radius, length, theta, phi)
11	dab	(length)
12	dab_xy	(length)
13	ellipsoid	(sld, solvent_sld, rpolar, requatorial)
14	ellipsoid_xy	(sld, solvent_sld, rpolar, requatorial, theta, phi)
15	fcc_paracrystal	(dnn, d_factor, radius, sld, solvent_sld)
16	fcc_paracrystal_xy	(dnn, d_factor, radius, sld, solvent_sld, theta, phi, psi)
17	flexible_cylinder_ex	(length, kuhn_length, radius, axis_ratio, sld, solvent_sld)
18	flexible_cylinder_ex_xy	(length, kuhn_length, radius, axis_ratio, sld, solvent_sld)
19	gaussian_peak	(q0, sigma)
20	gaussian_peak_xy	(q0, sigma)
21	guinier	(rg)
22	guinier_xy	(rg)
23	hardsphere	(effect_radius, volfraction)
24	hardsphere_xy	(effect_radius, volfraction)
25	HayterMSAsq	(effect_radius, zz, VolFrac, Temp, csalt, dialec)
26	HayterMSAsq_xy	(effect_radius, charge, volfraction, temperature, saltconc, dielectconst)
27	hollow_cylinder	(radius, core_radius, length, sld, solvent_sld)
28	hollow_cylinder_xy	(radius, core_radius, length, sld, solvent_sld, theta, phi)
29	lamellar	(sld, solvent_sld, thickness)
30	lamellar_xy	(sld, solvent_sld, thickness)
31	lamellar_FFHG	(tail_length, head_length, sld, head_sld, solvent_sld)
32	lamellar_FFHG_xy	(tail_length, head_length, sld, head_sld, solvent_sld)
33	lamellarCailleHG	(tail_length, head_length, Nlayers, dd, Cp, tail_sld, head_sld, solvent_sld)
34	lamellarCailleHG_xy	(tail_length, head_length, Nlayers, spacing, Caille_parameter, sld, head_sld, solvent_sld)
35	lamellarPC	(th, Nlayers, davg, pd, sld, solvent_sld)
36	lamellarPC_xy	(thickness, Nlayers, spacing, spacing_polydisp, sld, solvent_sld)
37	lamellarPS	(del, Nlayers, dd, Cp, sld, solvent_sld)
38	lamellarPS_xy	(thickness, Nlayers, spacing, Caille_parameter, sld, solvent_sld)
39	linear_pearls	(radius, edge_sep, num_pearls, pearl_sld, solvent_sld)
40	linear_pearls_xy	(radius, edge_sep, num_pearls, pearl_sld, solvent_sld)
41	lorentz	(cor_length)
42	lorentz_xy	(cor_length)
43	mass_fractal	(radius, mass_dim, cutoff_length)
44	mass_fractal_xy	(radius, mass_dim, cutoff_length)
45	mass_surface_fractal	(mass_dim, surface_dim, cluster_rg, primary_rg)
46	mass_surface_fractal_xy	(mass_dim, surface_dim, cluster_rg, primary_rg)
47	parallelepiped	(sld, solvent_sld, a_side, b_side, c_side)
48	parallelepiped_xy	(sld, solvent_sld, a_side, b_side, c_side, theta, phi, psi)
49	pearl_necklace	(radius, edge_separation, string_thickness, number_of_pearls, sld, string_sld, solvent_sld)
50	pearl_necklace_xy	(radius, edge_separation, string_thickness, number_of_pearls, sld, string_sld, solvent_sld)
51	sphere	(sld, solvent_sld, radius)
52	sphere_xy	(sld, solvent_sld, radius)
53	star_polymer	(radius2, arms)
54	star_polymer_xy	(radius2, arms)
55	stickyhardsphere	(effect_radius, volfraction, perturb, stickiness)
56	stickyhardsphere_xy	(effect_radius, volfraction, perturb, stickiness)
57	triaxial_ellipsoid	(sld, solvent_sld, req_minor, req_major, rpolar)
58	triaxial_ellipsoid_xy	(sld, solvent_sld, req_minor, req_major, rpolar, theta, phi, psi)

sasmodels name	Parameters	Units	Range
barbell	{ 4, 1, 40, 20, 400 }
barbell_xy	{ 4, 1, 40, 20, 400, 60, 60 }

	Parameters:
	Barbell scattering length density	4e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	Spherical bell radius	Ang	[0, inf]
	Cylindrical bar radius	Ang	[0, inf]
	Cylinder bar length	Ang	[0, inf]
	In plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]

bcc	{ 220, 0.06, 40, 4, 1 }
bcc_xy	{ 220, 0.06, 40, 4, 1, 60, 60, 60 }

	Parameters:
	Nearest neighbour distance	Ang	[-inf, inf]
	Paracrystal distortion factor		[-inf, inf]
	Particle radius	Ang	[0, inf]
	Particle scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	In plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]

capped_cylinder	{ 4, 1, 20, 20, 400 }
capped_cylinder_xy	{ 4, 1, 20, 20, 400, 60, 60 }

	Parameters:
	Cylinder scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	Cylinder radius	Ang	[0, inf]
	Cap radius	Ang	[0, inf]
	Cylinder length	Ang	[0, inf]
	In plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]

core_shell_cylinder	{ 4, 4, 1, 20, 20, 400 }
core_shell_cylinder_xy	{ 4, 4, 1, 20, 20, 400, 60, 60 }

	Parameters:
	Cylinder core scattering length density	1e-6/Ang^2	[-inf, inf]
	Cylinder shell scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	Cylinder core radius	Ang	[0, inf]
	Cylinder shell thickness	Ang	[0, inf]
	Cylinder length	Ang	[0, inf]
	In plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]

cylinder	{ 4, 1, 20, 400 }
cylinder_xy	{ 4, 1, 20, 400, 60, 60 }

	Parameters:
	Cylinder scattering length density	4e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	Cylinder radius	Ang	[0, inf]
	Cylinder length	Ang	[0, inf]
	In plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]

dab	{ 50.0 }
dab_xy	{ 50.0 }

	Parameters:
	correlation length	Ang	[0, inf]

ellipsoid	{ 4, 1, 20, 400 }
ellipsoid_xy	{ 4, 1, 20, 400, 60, 60 }

	Parameters:
	Ellipsoid scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	Polar radius	Ang	[0, inf]
	Equatorial radius	Ang	[0, inf]
	In plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]

fcc	{ 220, 0.06, 40, 4, 1 }
fcc_xy	{ 220, 0.06, 40, 4, 1, 60, 60, 60 }

	Parameters:
	Nearest neighbour distance	Ang	[-inf, inf]
	Paracrystal distortion factor		[-inf, inf]
	Particle radius	Ang	[0, inf]
	Particle scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	In plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]

flexible_cylinder_ex	{ 1000.0, 100.0, 20.0, 1.5, 1.0, 6.3 }
flexible_cylinder_ex_xy	{ 1000.0, 100.0, 20.0, 1.5, 1.0, 6.3 }

	Parameters:
	Length of the flexible cylinder	Ang	[0, inf]
	Kuhn length of the flexible cylinder	Ang	[0, inf]
	Radius of the flexible cylinder	Ang	[0, inf]
	Axis_ratio (major_radius/radius		[0, inf]
	Cylinder scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]

gaussian_peak	{ 0.05, 0.005 }
gaussian_peak_xy	{ 0.05, 0.005 }

	Parameters:
	Peak position	1/Ang	[-inf, inf]
	Peak width (standard deviation)	1/Ang	[0, inf]

guinier	{ 60.0 }
guinier_xy	{ 60.0 }

	Parameters:
	Radius of Gyration	Ang	[0, inf]

hardsphere	{ 50.0, 0.2 }
hardsphere_xy	{ 50.0, 0.2 }

	Parameters:
	effective radius of hard sphere	Ang	[0, inf]
	volume fraction of hard spheres		[0, 0.74]

HayterMSAsq	{ 20.75, 19.0, 0.0192, 318.16, 0.0, 71.08 }
HayterMSAsq_xy	{ 20.75, 19.0, 0.0192, 318.16, 0.0, 71.08 }

	Parameters:
	effective radius of hard sphere	Ang	[0, inf]
	charge on sphere (in electrons)	e	[0, inf]
	volume fraction of spheres		[0, 0.74]
	temperature, in Kelvin, for Debye length calculation	K	[0, inf]
	conc of salt, 1:1 electolyte, for Debye length	M	[-inf, inf]
	dielectric constant of solvent (default water), for Debye length		[-inf, inf]

hollow_cylinder	{ 30.0, 20.0, 400.0, 6.3, 1 }
hollow_cylinder_xy	{ 30.0, 20.0, 400.0, 6.3, 1, 90, 0 }

	Parameters:
	Cylinder radius	Ang	[0, inf]
	Hollow core radius	Ang	[0, inf]
	Cylinder length	Ang	[0, inf]
	Cylinder sld	1/Ang^2	[-inf, inf]
	Solvent sld	1/Ang^2	[-inf, inf]
	Theta angle	degrees	[-360, 360]
	Phi angle	degrees	[-360, 360]

lamellar	{ 1, 6, 50 }
lamellar_xy	{ 1, 6, 50 }

	Parameters:
	Layer scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	Bilayer thickness	Ang	[0, inf]

lamellarCaille	{ 30.0, 20, 400.0, 0.1, 6.3, 1.0 }
lamellarCaille_xy	{ 30.0, 20, 400.0, 0.1, 6.3, 1.0 }

	Parameters:
	sheet thickness	Ang	[0, inf]
	Number of layers		[0, inf]
	d-spacing of Caille S(Q)	Ang	[0.0, inf]
	Caille parameter	1/Ang^2	[0.0, 0.8]
	layer scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]

lamellarCailleHG	{ 10, 2, 30, 40.0, 0.001, 0.4, 2.0, 6 }
lamellarCailleHG_xy	{ 10, 2, 30, 40.0, 0.001, 0.4, 2.0, 6 }

	Parameters:
	Tail thickness	Ang	[0, inf]
	head thickness	Ang	[0, inf]
	Number of layers		[0, inf]
	d-spacing of Caille S(Q)	Ang	[0.0, inf]
	Caille parameter		[0.0, 0.8]
	Tail scattering length density	1e-6/Ang^2	[-inf, inf]
	Head scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]

lamellarFFHG	{ 15, 10, 0.4, 3.0, 6 }
lamellarFFHG_xy	{ 15, 10, 0.4, 3.0, 6 }

	Parameters:
	Tail thickness	Ang	[0, inf]
	head thickness	Ang	[0, inf]
	Tail scattering length density	1e-6/Ang^2	[-inf, inf]
	Head scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]

lamellarPC	{ 33.0, 20, 250.0, 0.0, 1.0, 6.34 }
lamellarPC_xy	{ 33.0, 20, 250.0, 0.0, 1.0, 6.34 }

	Parameters:
	sheet thickness	Ang	[0, inf]
	Number of layers		[0, inf]
	d-spacing of paracrystal stack	Ang	[0.0, inf]
	d-spacing polydispersity	Ang	[0.0, inf]
	layer scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]

linear_pearls	{ 80.0, 350.0, 3.0, 1.0, 6.3 }
linear_pearls_xy	{ 80.0, 350.0, 3.0, 1.0, 6.3 }

	Parameters:
	Radius of the pearls	Ang	[0, inf]
	Length of the string segment - surface to surface	Ang	[0, inf]
	Number of the pearls		[0, inf]
	SLD of the pearl spheres	1e-6/Ang^2	[-inf, inf]
	SLD of the solvent	1e-6/Ang^2	[-inf, inf]

lorentz	{ 50.0 }
lorentz_xy	{ 50.0 }

	Parameters:
	Screening length	Ang	[0, inf]

mass_fractal	{ 10.0, 1.9, 100.0 }
mass_fractal_xy	{ 10.0, 1.9, 100.0 }

	Parameters:
	Particle radius	Ang	[0.0, inf]
	Mass fractal dimension		[1.0, 6.0]
	Cut-off length	Ang	[0.0, inf]

mass_surface_fractal	{ 1.8, 2.3, 86.7, 4000.0 }
mass_surface_fractal_xy	{ 1.8, 2.3, 86.7, 4000.0 }

	Parameters:
	Mass fractal dimension		[1e-16, 6.0]
	Surface fractal dimension		[1e-16, 6.0]
	Cluster radius of gyration	Ang	[0.0, inf]
	Primary particle radius of gyration	Ang	[0.0, inf]

parallelepiped	{ 4, 1, 35, 75, 400 }
parallelepiped_xy	{ 4, 1, 35, 75, 400, 60, 60, 60 }

	Parameters:
	Parallelepiped scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	Shorter side of the parallelepiped	Ang	[0, inf]
	Second side of the parallelepiped	Ang	[0, inf]
	Larger side of the parallelepiped	Ang	[0, inf]
	In plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]
	Rotation angle around its own c axis against q plane	degrees	[-inf, inf]

pearl_necklace	{ 80.0, 350.0, 2.5, 3, 1.0, 1.0, 6.3 }
pearl_necklace_xy	{ 80.0, 350.0, 2.5, 3, 1.0, 1.0, 6.3 }

	Parameters:
	Mean radius of the chained spheres	Angstrom	[0, inf]
	Mean separation of chained particles	Angstrom	[0, inf]
	Thickness of the chain linkage	Angstrom	[0, inf]
	Mean number of pearls in each necklace	none	[0, inf]
	Scattering length density of the chained spheres	Angstrom^2	[-inf, inf]
	Scattering length density of the chain linkage	Angstrom^2	[-inf, inf]
	Scattering length density of the solvent	Angstrom^2	[-inf, inf]

sphere	{ 1, 6, 50 }
sphere_xy	{ 1, 6, 50 }

	Parameters:
	Layer scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	Sphere radius	Ang	[0, inf]

star_polymer	{ 100.0, 3 }
star_polymer_xy	{ 100.0, 3 }

	Parameters:
	Ensemble radius of gyration squared of an arm	Ang	[0.0, inf]
	Number of arms in the model		[1.0, 6.0]

stickyhardsphere	{ 50.0, 0.2, 0.05, 0.2 }
stickyhardsphere_xy	{ 50.0, 0.2, 0.05, 0.2 }

	Parameters:
	effective radius of hard sphere	Ang	[0, inf]
	volume fraction of hard spheres		[0, 0.74]
	perturbation parameter, epsilon		[0.01, 0.1]
	stickiness, tau		[-inf, inf]

triaxial_ellipsoid	{ 4, 1, 20, 400, 10 }
triaxial_ellipsoid_xy	{ 4, 1, 20, 400, 10, 60, 60, 60 }

	Parameters:
	Ellipsoid scattering length density	1e-6/Ang^2	[-inf, inf]
	Solvent scattering length density	1e-6/Ang^2	[-inf, inf]
	Minor equitorial radius	Ang	[0, inf]
	Major equatorial radius	Ang	[0, inf]
	Polar radius	Ang	[0, inf]
	In plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]
	Out of plane angle	degrees	[-inf, inf]

SasView name	sasmodels name	P(Q)	S(Q)	Multiply	Multiplicity
BarBell	barbell	-	-	-	-
BCCrystal	bcc	-	-	-	-
CappedCylinder	capped_cylinder	-	-	-	-
CoreShellCylinder	core_shell_cylinder	-	-	-	-
Cylinder	cylinder	-	-	-	-
DAB	dab	-	-	-	-
Ellipsoid	ellipsoid	-	-	-	-
FCCrystal	fcc	-	-	-	-
FlexCylEllipX	flexible_cylinder_ex	-	-	-	-
PeakGauss	gaussian_peak	-	-	-	-
Guinier	guinier	-	-	-	-
HardsphereStructure	hardsphere	-	Y	-	-
HayterMSAStructure	HayterMSAsq	-	Y	-	-
HollowCylinder	hollow_cylinder	-	-	-	-
Lamellar	lamellar	-	-	-	-
LamellarPS	lamellarCaille	-	-	-	-
LamellarPSHG	lamellarCailleHG	-	-	-	-
LamellarFFHG	lamellarFFHG	-	-	-	-
LamellarPCrystal	lamellarPC	-	-	-	-
LinearPearls	linear_pearls	-	-	-	-
Lorentz	lorentz	-	-	-	-
MassFractal	mass_fractal	-	-	-	-
MassSurfaceFractal	mass_surface_fractal	-	-	-	-
Parallelepiped	parallelepiped	-	-	-	-
PearlNecklace	pearl_necklace	-	-	-	-
Sphere	sphere	-	-	-	-
StarPolymer	star_polymer	-	-	-	-
StickyHSStructure	stickyhardsphere	-	Y	-	-
TriaxialEllipsoid	triaxial_ellipsoid	-	-	-	-

The SasView_model Component

Identification

Description

Available SasView sasmodels - Extended parameters description

Name convention: SasView - sasmodels

Input parameters

Links

The `SasView_model` Component