[ Identification | Description | Input parameters | Output parameters | Links ]
SANS_Guinier
ComponentSample that scatters with a Guinier shape. This is just an example where analytically an integral exists. The neutron paths are proportional to the intensity (low intensity > few paths). Guinier function (Rg) a = Rg*Rg/3 propability_unscaled = q * exp(-a*q*q) integral_prop_unscal = 1/(2*a) * (1 - exp(-a*q*q)) propability_scaled = 2*a * q*exp(-a*q*q) / (1 - exp(-a*q*q)) integral_prop_scaled = (1 - exp(-a*q*q)) / (1 - exp(-a*qmax*qmax)) In this simulation method many paths occur for high propability. For simulation of low intensities see SANS_AnySamp. Sample components leave the units of flux for the probability of the individual paths. That is more consitent than the Sans_spheres routine. Furthermore one can simulate the transmitted beam. This allows to determine the needed size of the beam stop. Only absorption has not been included yet to these sample-components. But thats really nothing. Example: SANS_Guinier(transm=0.5, Rg=100, qmax=0.03, xwidth=0.01, yheight=0.01, zthick=0.001)WARNING: This is a contributed Component.
Name | Unit | Description | Default |
---|---|---|---|
transm | 1 | : (coherent) transmission of sample for the optical path "zthick" | 0.5 |
Rg | Angs | : Radius of Gyration | 100 |
qmax | AA-1 | : Maximum scattering vector | 0.03 |
xwidth | m | : horiz. dimension of sample, as a width (m) | 0.01 |
yheight | m | : vert.. dimension of sample, as a height (m) | 0.01 |
zthick | m | : thickness of sample (m) | 0.001 |
Name | Unit | Description | Default |
---|---|---|---|
q_v |
SANS_Guinier.comp
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[ Identification | Description | Input parameters | Output parameters | Links ]
Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Thu Mar 4 21:22:11 2010