Development of an ultra-sensitive 210-micron array of KIDs for far-IR astronomy

• DOI: 10.48550/arxiv.2408.03859
• Publication Date: 2024-01-01
• Authors: Kane, Elijah; Albert, Chris; Cothard, Nicholas; Hailey-Dunsheath,...; Echternach, Pierre; Foote, Logan; Janssen, Reinier M.; Henry; LeDuc; Lun-Jun; Liu; Nguyen, Hien; Glenn, Jason; Charles; Bradford; Zmuidzinas, Jonas
• Keywords: FOS: Physical sciences; Astrophysics - Instrumentation and Methods for Astrophysics; Instrumentation and Methods for Astrophysics (astro-ph.IM)

The Probe far-Infrared Mission for Astrophysics (PRIMA) is a proposed space observatory which will use arrays of thousands of kinetic inductance detectors (KIDs) to perform low- and moderate-resolution spectroscopy throughout the far-infrared. The detectors must have noise equivalent powers (NEPs) at or below 0.1 aW/sqrt(Hz) to be subdominant to noise from sky backgrounds and thermal noise from PRIMA's cryogenically cooled primary mirror. Using a Radio Frequency System on a Chip for multitone readout, we measure the NEPs of detectors on a flight-like array designed to observe at a wavelength of 210 microns. We find that 92% of the KIDs measured have an NEP below 0.1 aW/sqrt(Hz) at a noise frequency of 10 Hz.<br/>7 pages, 7 figures<br/>