Terahertz intensity mapper focal plane and array design
Abstract
TIM, the Terahertz Intensity Mapper, is a NASA balloon mission designed to perform [CII] intensity mapping of the peak of cosmic star formation. To achieve this, TIM has two longslit (1 degree slit length) grating spectrometers covering the 240-317 um and 317-420 um wavelength bands at R~250, respectively. We will present the design of the ~4000 pixel, horn-coupled kinetic inductance detector arrays servicing each of the spectrometer arms. Each pixel is a lumped-element superconducting resonator made from a 20 nm thick aluminum film, designed to achieve photon noise limited performance at 100 fW of loading. The inductor is a meandered narrow wire, designed to mimic a metal mesh grid at THz frequencies; it is optimized for absorption of both polarizations delivered by the circular waveguide. Each array will consist of four quadrants containing ~1000 pixels on a single microstrip readout line and will be mounted such that critical parameters of the absorber design are maintained.
Additional Information
© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).Attached Files
Published - SPIE-AS20-068e5f5b-5402-ea11-813d-005056be4d05.pdf
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Additional details
- Eprint ID
- 107521
- Resolver ID
- CaltechAUTHORS:20210115-133906623
- Created
-
2021-01-15Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 11453