Abstract
The Terahertz Intensity Mapper (TIM) is a NASA far-infrared balloon mission designed to perform [CII] intensity mapping of the peak of cosmic star formation. To achieve this goal, TIM will fly two grating spectrometers that together cover the 240–420 μ m wavelength range at a spectral resolution, R∼ 250. Each spectrometer will require a large format (∼ 3600 detectors) array of dual-polarization sensitive detectors, which are photon noise limited at the 100 fW of loading expected during operation. We present the design of a fully-aluminum low-volume lumped-element kinetic inductance detector that incorporates a novel “chain-link” absorber design. Operating at 215 mK, we demonstrate this detector achieves a photon noise limited performance at 100 fW of optical loading with a white noise spectrum down to 1 Hz. Based upon noise measurements of a dark detector, which shows a quasi-particle lifetime of 300μs, these KIDs are expected to achieve a detector-limited noise equivalent power of ∼1.3×10-18W/Hz.
Original language | English (US) |
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Pages (from-to) | 197-206 |
Number of pages | 10 |
Journal | Journal of Low Temperature Physics |
Volume | 211 |
Issue number | 5-6 |
DOIs | |
State | Published - Jun 2023 |
Keywords
- Aluminum
- Balloon
- Far-infrared spectroscopy
- Kinetic inductance detector
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- General Materials Science
- Condensed Matter Physics