[ Identification | Description | Input 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 AA, 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 E0 value indicates that is is parametrized by energy (in keV) as opposed to wavelength (in AA). Wavelength is the default. Flux is set in the unit photons/s Example: Source_flat(xwidth=1e-3,yheight=1e-3, focus_xw=0.5e-2, focus_yh=0.45e-2,dist=1, E0=E0, dE=DE)
| Name | Unit | Description | Default | |
| 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 | |
| randomphase | If nonzero, the phase of the emotted photon is random, i.e. source is fully incoherent. otherwise the value of phase is used. | 1 | ||
| phase | rad | Set phase to something given. | 0 | |
| spectrum_file | string | Filename for optional spectrum-file | "" |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
Source_flat.comp.
[ Identification | Description | Input parameters | Links ]
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