[ Identification | Description | Input parameters | Output parameters | Links ]
Source_flat ComponentA circular or rectangular xray source. Spectrum may be either gaussian or uniform around a central wavelength/energy or read from a datafile. Xrays are considered emitted uniformly into 4pi, but a square target retricts the beam to that window and scales the beam intensity accordingly. If an input spectrum datafile (spectrum_file) is not specified, the beam is restricted to emit photons between E0+-dE keV, or lambda0+-dlambda Å, whichever is given. The input spectrum file should be formatted such that x-ray energy/wavelength is in the first column and the intensity in the second. Any preceding lines starting with # are considered part of the file header. If a datafile is given, a nonzero E¤0 value indicates that is is parametrized by energy ( in keV) as opposed to wavelength (in Å). Wavelength is the default. Flux is set in the unit photons/s
| Name | Unit | Description | Default |
|---|---|---|---|
| spectrum_file | NULL | ||
| radius | m | Radius of circle in (x,y,0) plane where x-rays are generated. | 0 |
| yheight | m | Height of rectangle in (x,y,0) plane where x-rays are generated. | 0 |
| xwidth | m | Width of rectangle in (x,y,0) plane where x-rays are generated. Overrides xmin and xmax. | 0 |
| xmin | m | Lower bound of x-interval where photons are generated. | 0 |
| xmax | m | upper bound of x-interval where photons 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 | keV | Mean energy of xrays. | 0 |
| dE | keV | Energy half spread of x-rays (flat or gaussian sigma). | 0 |
| lambda0 | AA | Mean wavelength of x-rays. | 0 |
| dlambda | AA | Wavelength half spread of x-rays. | 0 |
| flux | pht/s | total flux radiated from the source | 0 |
| gauss | 1 | Gaussian (1) or Flat (0) energy/wavelength distribution | 0 |
| incoherent | 1 | ||
| phase | 0 |
| Name | Unit | Description | Default |
|---|---|---|---|
| prms | |||
| square |
Source_flat.comp.
[ Identification | Description | Input parameters | Output parameters | Links ]
Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri Sep 2 21:40:01 2011