[ Identification | Description | Input parameters | Links ]
templateDIFF InstrumentA template powder diffractometer used as a tutorial at LLB. Default geometry is from D20@ILL. If included after a guide, use ALPHA1=0 and L1=0 (the first collimator is then the guide with effective ALPHA1=m*0.1*lambda). If you prefer to include explicitely a collimator before the monochromator, use L1=1.2. Monochromator lattice parameter PG 002 DM=3.355 AA (Highly Oriented Pyrolythic Graphite) PG 004 DM=1.607 AA Heusler 111 DM=3.362 AA (Cu2MnAl) CoFe DM=1.771 AA (Co0.92Fe0.08) Ge 111 DM=3.266 AA Ge 311 DM=1.714 AA Ge 511 DM=1.089 AA Ge 533 DM=0.863 AA Si 111 DM=3.135 AA Cu 111 DM=2.087 AA Cu 002 DM=1.807 AA Cu 220 DM=1.278 AA Cu 111 DM=2.095 AA
| Name | Unit | Description | Default |
| lambda | Angs | Wavelength at monochromator, computed from DM and THETA_M if left as 0. | 1 |
| DM | Angs | d-spacing of monochromator, computed from lambda and THETA_M if left as 0. | 3.355 |
| Powder | str | File name for powder description | "Na2Ca3Al2F14.laz" |
| RV | m | Monochromator vertical curvature, 0 for flat, -1 for automatic setting | -1 |
| L1 | m | Source-Monochromator distance | 17 |
| L2 | m | Monochromator-Sample distance | 3.2 |
| L3 | m | Sample-Detector distance | 1.471 |
| ALPHA1 | min | Horizontal collimator divergence for L1 arm (before monochromator) | 5 |
| ALPHA2 | min | Horizontal collimator divergence for L2 arm (monochromator-sample) | 60 |
| ALPHA3 | min | Horizontal collimator divergence for L3 arm (sample-detector) | 5 |
| ETA | min | Monochromator horizontal mosaic (gaussian) | 12 |
| verbose | int | Print DIF configuration. 0 to be quiet | 1 |
| THETA_M | deg | Monochromator take-off angle, computed from lambda and DM if left as 0. | 0 |
| SM | int | Scattering sense of beam from Monochromator. 1:left, -1:right | 1 |
templateDIFF.instr.
[ Identification | Description | Input parameters | Links ]
Generated on 2023-09-19 20:01:36