Fabry-Perot Characteristics
Updated 6 Jun 2021, C. Briceno
This page contains information about the two Fabry-Perot units used in the SAM-FP mode. (Note that the Fabry-Perot module in SAM is not currently available).
Low-Resolution Fabry-Perot (LRFP)
| Normal gap size | 44 μm | ||
| Nominal order for Ha | 134 | ||
| Nominal Free-Spectral-Range | - | 48.95 Å | 2236 km.s-1 |
| Free-Spectral-Range | 345.99 ± 0.14 bcv | - | - |
| Sampling | 0.1415 Å.bcv-1 | ||
| Finesse | 41.72 | ||
| Number of channels | 84 | ||
| Full-width at half-maximum | 8.29 ± 0.1 bcv | 1.17 ± 0.01 Å | 53.4 ± 0.45 km.s-1 |
High-Resolution Fabry-Perot (HRFP)
| Normal gap size | 200 μm | ||
| Nominal order for Ha | 609.48 | ||
| Nominal Free-Spectral-Range | - | 10.77 Å | 491.96 km.s-1 |
| Free-Spectral-Range | 350.24 bcv | - | - |
| Sampling | 0.0308 Å.bcv-1 | ||
| Finesse | 16.45 | ||
| Number of channels | 36 | ||
| Full-width at half-maximum | 21.29 ± 1.28 bcv | 0.655 ± 0.039 Å | 29.81 ± 1.80 km.s-1 |
Updated on June 5, 2021, 7:11 pm