Conceptual Design of VIOLA: Vipa Instrument for Oxygen Loaded Atmospheres

Surangkhana Rukdee

doi:10.1117/12.3019973

19 July 2024 Conceptual Design of VIOLA: Vipa Instrument for Oxygen Loaded Atmospheres

Surangkhana Rukdee

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130968U (2024) https://doi.org/10.1117/12.3019973
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

Studying the atmospheres of exoplanets is a critical and rapid way to learn more about worlds outside our solar system. Highresolution spectroscopy (R≥100,000) is necessary to distinguish overlapping absorption features from different molecules, especially for ground-based observations. For molecular oxygen in the atmospheres of Earth-analogs, it is recommended to operate at R=300,000–400,000. A Virtually Imaged Phased Array (VIPA) offers structural simplicity and compact dimensions, rendering it highly suitable as the primary dispersing element in such ultra-high resolution narrow-band spectrometers. In this work, we aim for a high-throughput spectrograph: VIPA Instrument for Oxygen Loaded Atmospheres (VIOLA), a VIPA spectrograph using a Volume Phase Holographic Grating as a cross-disperser. Commercial, highperformance optical components will facilitate swift and efficient implementation. We present a preliminary optical design, resulting image quality and prospects for VIOLA in advancing high-resolution spectroscopy for the study of exoplanet atmospheres.

Citation Download Citation

Surangkhana Rukdee "Conceptual Design of VIOLA: Vipa Instrument for Oxygen Loaded Atmospheres", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130968U (19 July 2024); https://doi.org/10.1117/12.3019973

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