Performance characterization of an InGaAs NIR sensor for the JASMINE mission

Le résumé fourni par la source

JASMINE is a Japanese infrared astrometry mission under study for development toward a 2032 launch, aiming to perform astrometry of the Galactic Center and a survey for transiting planets around M dwarfs. Its focal plane will employ four domestically developed ∼2k × 2k InGaAs near-infrared detectors. Building on previous ground-based InGaAs sensor work for astronomy, we are developing an upgraded detector for space use. Low-temperature vacuum tests of a prototype sensor at around 170 K show, based on a nominal conversion gain, a median dark current of 0.70 e− s−1 pixel−1, a median correlated double sampling (CDS) noise of 14.6 e− rms, and a small-scale photoresponse nonuniformity of 0.61% rms in a representative region. A preliminary quantum-efficiency measurement suggests high sensitivity across the JASMINE wavelength range, although the absolute calibration remains under investigation. This paper reports the current status of the low-temperature detector performance characterization.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.