Radiation qualification of lens-absorber and antenna-coupled KIDs for the PRIMA mission

Le résumé fourni par la source

Despite significant progress in far-infrared detector technology, demonstrating radiation hardness remains a critical step for space qualification. This is particularly relevant for the PRIMA mission, which require detectors capable of operating reliably over a decade in the L2 environment. PRIMAger includes two KID designs: single-polarized leaky-lens antenna-coupled KIDs for the Polarimetric Imager (PPI), and lens-absorber-coupled KIDs for the Hyperspectral Imager (PHI). All devices are based on NbTiN resonators with an aluminum section for radiation absorption. PHI uses absorbers on solid Si, whereas PPI uses an aluminum coplanar waveguide coupled to an antenna fabricated on a 100 nm SiN membrane. During the test campaign conducted at PARTREC (the Netherlands), our prototypes were cooled down in the DRACuLA cryostat to 120 mK and exposed to proton-beam radiation corresponding to the total dose expected over ten years at L2. The results show negligible degradation in key parameters.

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