[ Identification | Description | Input parameters | Links ]
Reflectometer InstrumentA horizontal reflectometer. The instrument is built of a 2.5 m long mirror and an inclined elliptical guide. The grazing angle is defined by a set of slits. The sample size is 4cm x 4cm (horizontal sample). The role of the mirror is to provide an angle of incidence of up to 4 deg and at the same time avoid a direct line of sight to the source. The reflectivity is the ratio between the direct beam reflected beam intensities. Therefore two simulations are needed to get the reflectivity curve: Example: mcrun Reflectometer.instr -n1e10 directbeam=1,thetasample=0.4,Qmin=0,Qmax=0.15 -d directbeam Example: mcrun Reflectometer.instr -n1e10 directbeam=0,thetasample=0.4,Qmin=0,Qmax=0.15 -d reflectedbeam
| Name | Unit | Description | Default |
| directbeam | If 1, the sample is a mirror with reflectivity 1. If 0, the mirror reflects like a D2O surface with zero roughness | 1 | |
| Lam_min | AA | Minimum wavelength emitted by the cold moderator | 2.0 |
| Lam_max | AA | Maximum wavelength emitted by the cold moderator | 10 |
| deltatheta | % | The angular resolution | 2 |
| theta_sample | deg | The grazing angle | 1 |
| defineAngle | If 0, the angle defining slits are wide open. If 1 the angular resolution is deltatheta | 1 | |
| Qmin | AA^-1 | The minimum value of the interesting Qrange | 0 |
| Qmax | AA^-1 | The maximum value of the interesting Qrange | 0.5 |
| straight | If 1, the guide walls are straight | 1 | |
| width | m | The width of the guide in the case of straight guide walls | 0.05 |
Reflectometer.instr.
[ Identification | Description | Input parameters | Links ]
Generated on 2023-09-19 20:01:36