[ Identification | Description | Input parameters | Links ]
Fluo_detector ComponentA detector that records energy spectrum from e.g. fluorescence. This component handles: - fluorescence detector escape (energy shift from detector K-alpha) - fluorescence detector pile-up (sum aka time-coincidence aka pile-up within detector dead-time) - energy resolution (above Fano level) The detector geometry can be a rectangle xwidth*yheight, or a disk of given 'radius'. When the radius is given negative, a 4PI detector sphere of given radius is assumed. The detector escape corresponds with a fluorescence excitation within the detector itself that subtracts the K-alpha detector level from the sample scattered energy. The level of escape peaks in set as 'escape_ratio', e.g. 1-2 %. The detector pile-up is related to the detector dead-time, within which time coincidence between two fluorescence photons are summed-up. The level of pile-up is set as 'pileup_ratio', e.g. 1-2 % which can increase for high count rates that saturate the detector. Last, the fluorescence peak shape is broadened using an electronic noise (at E=0) and a nominal resolution at E=resolution_energy (in keV). You may set the electronic_noise to zero for a perfect detector (Fano limit). To use a constant resolution, set the resolution_energy=0. Example: Fluo_detector(xwidth=0.1, yheight=0.1, Emin=1, Emax=50, nE=20, filename="Output.nrj")
| Name | Unit | Description | Default | |
| radius | m | Radius of disk detector (in XY plane). When given as negative, a 4PI sphere is assumed. | 0 | |
| xwidth | m | Width of rectangle detector. | 0 | |
| yheight | m | Height of rectangle detector. | 0 | |
| Emin | keV | Minimum energy to detect. | 1 | |
| Emax | keV | Maximum energy to detect. | 39 | |
| nE | m | Number of energy channels. | 2000 | |
| filename | str | Name of file in which to store the detector image. | 0 | |
| restore_xray | 0/1 | If set, the monitor does not influence the x-ray state. | 0 | |
| escape_ratio | 1 | Detector escape peak ratio, e.g. 0.01-0.02. Zero inactivates. | 0.01 | |
| escape_energy | keV | Detector escape peak energy, e.g. 1.739 for Si, 9.886 for Ge. | 1.739 | |
| pileup_ratio | 1 | Sum aka time coincidence aka pile-up detector peak ratio, e.g. 0.01-0.02. This is e.g. the dead-time ratio. Zero inactivates. | 0.01 | |
| electronic_noise | keV | Electronic noise at E=0, FWHM in keV. Use electronic_noise=0 for Fano limit. | 0.1 | |
| resolution_energy | keV | Energy at which resolution is given, e.g. 5.9 keV Mn K-alpha. | 6 | |
| resolution | keV | Resolution FWHM in keV at resolution_energy. | 0.2 | |
| flag_lorentzian | 1 | When 1, the line shapes are assumed to be Lorentzian, else Gaussian. | 0 |
| AT ( | , | , | ) RELATIVE | |||
|---|---|---|---|---|---|---|
| ROTATED ( | , | , | ) RELATIVE |
Fluo_detector.comp.
[ Identification | Description | Input parameters | Links ]
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