[ Identification | Description | Input parameters | Links ]
Source_simple ComponentThe routine is a circular neutron source, which aims at a square target centered at the beam (in order to improve MC-acceptance rate). The angular divergence is then given by the dimensions of the target. The neutron energy is uniformly distributed between lambda0-dlambda and lambda0+dlambda or between E0-dE and E0+dE. The flux unit is specified in n/cm2/s/st/energy unit (meV or Angs). This component replaces Source_flat, Source_flat_lambda, Source_flux and Source_flux_lambda. Example: Source_simple(radius=0.1, dist=2, focus_xw=.1, focus_yh=.1, E0=14, dE=2)
| Name | Unit | Description | Default | |
| radius | m | Radius of circle in (x,y,0) plane where neutrons are generated. | 0.1 | |
| yheight | m | Height of rectangle in (x,y,0) plane where neutrons are generated. | 0 | |
| xwidth | m | Width of rectangle in (x,y,0) plane where neutrons are generated. | 0 | |
| dist | m | Distance to target along z axis. | 0 | |
| focus_xw | m | Width of target | .045 | |
| focus_yh | m | Height of target | .12 | |
| E0 | meV | Mean energy of neutrons. | 0 | |
| dE | meV | Energy half spread of neutrons (flat or gaussian sigma). | 0 | |
| lambda0 | AA | Mean wavelength of neutrons. | 0 | |
| dlambda | AA | Wavelength half spread of neutrons. | 0 | |
| flux | 1/(s*cm**2*st*energy unit) | flux per energy unit, Angs or meV if flux=0, the source emits 1 in 4*PI whole space. | 1 | |
| gauss | 1 | Gaussian (1) or Flat (0) energy/wavelength distribution | 0 | |
| target_index | 1 | relative index of component to focus at, e.g. next is +1 this is used to compute 'dist' automatically. | +1 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
Source_simple.comp.
[ Identification | Description | Input parameters | Links ]
Generated on 2023-09-19 20:01:36