PRIMA: demonstration of a high-efficiency 25-45 μm Linear Variable Filter for PRIMAger

Willem Jellema; Marcel Bruijn; Kenichiro Nagayoshi; Marcel Ridder; Nathalie Gorter; Martin Eggens; Erik van der Meer; Robert Huisman; Sven Visser; Sander van Loon; Sanghati Roy; Laure Ciesla; Denis Burgarella; Marc Sauvage; C. Darren Dowell; Jason Glenn

doi:10.1117/12.3020634

17 August 2024 PRIMA: demonstration of a high-efficiency 25-45 μm Linear Variable Filter for PRIMAger

Willem Jellema, Marcel Bruijn, Kenichiro Nagayoshi, Marcel Ridder, Nathalie Gorter, Martin Eggens, Erik van der Meer, Robert Huisman, Sven Visser, Sander van Loon, Sanghati Roy, Laure Ciesla, Denis Burgarella, Marc Sauvage, C. Darren Dowell, Jason Glenn

Author Affiliations +

Proceedings Volume PC13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII; PC1310210 (2024) https://doi.org/10.1117/12.3020634
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

Proposed for a late 2031 launch, PRIMA, the Probe far-Infrared Mission for Astrophysics, closes the gap between JWST and ALMA, offering unprecedented sensitivity and spectroscopic mapping capability in the 24-264 μm range for detailed studies of galactic evolution, planetary atmospheres, and dust-metal dynamics. Onboard PRIMA, the PRIMAger camera operates in the 25-80 μm bands utilizing advanced MKID detector modules for hyperspectral imaging enabled by Linear Variable Filters. This paper presents a graded resonant metal-mesh filter technology, demonstrating very promising efficiency in the short wavelength range. Overcoming dielectric loss limitations, an innovative dual-layer LVF design on thin membranes achieves a transmission of 80-90% at 12 THz. Rigorous electromagnetic modeling, optimization, and position-dependent spectral response measurements validate the filter performance. We present a comprehensive set of simulation and experimental results, including environmental pre-qualification tests, strongly supporting the suitability of this technology for future space applications.

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Willem Jellema, Marcel Bruijn, Kenichiro Nagayoshi, Marcel Ridder, Nathalie Gorter, Martin Eggens, Erik van der Meer, Robert Huisman, Sven Visser, Sander van Loon, Sanghati Roy, Laure Ciesla, Denis Burgarella, Marc Sauvage, C. Darren Dowell, and Jason Glenn "PRIMA: demonstration of a high-efficiency 25-45 μm Linear Variable Filter for PRIMAger", Proc. SPIE PC13102, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XII, PC1310210 (17 August 2024); https://doi.org/10.1117/12.3020634

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