| Name: | Akshay M S |
| Affiliation: | Indian Institute of Space Science and Technology |
| Conference ID: | ASI2025_425 |
| Title: | Studying cross-dispersion options for a near-infrared echelle spectrographs |
| Authors: | Akshay M S 1, Arun Surya 2 |
| Authors Affiliation: | 1 Indian Institute of Space Science and Technology, Thiruvananthapuram-695547, India
2 Indian Institute of Astrophysics, Bangaluru-560034, India |
| Mode of Presentation: | Poster |
| Abstract Category: | Facilities, Technologies and Data science |
| Abstract: | Near-Infrared Echelle Spectrographs with high spectral resolution (R~30000-60000) offers unique insights into several astrophysical phenomena. Several science cases like probing exoplanet atmospheres through transit spectrometry , observing YSOs and using radial velocity techniques for M-dwarf companions are some of the few science cases among many that can be uniquely targeted using near-infrared spectrographs. One of the main challenges of near-infrared echelle spectrograph design is finding the right cross dispersion elements to achieve the best slit size and fiber multiplexing in case of fiber based spectrographs. In this study we use Zemax and study the cross -dispersion with several configurations of single-pass prisms, double-pass prisms and Grisms. We use primarily infrared materials like ZnS and Fused Silica for these studies. We also explore using grism configurations to understand the best and simple model in various echelle configurations. This study will be useful for infrared spectrograph designers and is planned for use with our design of a near-infrared echelle spectrograph for HCT or DOT. |
