Engineering topics

Hailey-Dunsheath, Steven

Publications and source records attributed to Hailey-Dunsheath, Steven.

2 records

NASA NTRS2020

Absorber Optimization Study for the Terahertz Intensity Mapper (TIM)

We discuss the design and optimization of the absorber for the long-wavelength arm of the Terahertz Intensity Mapper (TIM), a balloon-borne spectrometer employing Kinetic Inductance Detectors (KIDs). Electromagnetic simulations of our design indicate in-band absorption efficiency over 80% in both linear polarization modes. By developing custom transmission line model and mode-matching calculations, we find the absorption efficiency is affected by the absorber’s reactive part and overall shape. These insights into the operation of this design provide guidance for its optimization for low-resistance absorber. materials.

Nie, Rong↗

NASA NTRS2013

Ultra-Compact, Superconducting Spectrometer-on-a-Chip at Submillimeter Wavelengths

Small size, wide spectral bandwidth, and highly multiplexed detector readout are required to develop powerful multi-beam spectrometers for high-redshift observations. Currently available spectrometers at these frequencies are large and bulky. The grating sizes for these spectrometers are prohibitive. This fundamental size issue is a key limitation for space-based spectrometers for astrophysics applications. A novel, moderate-resolving-power (R-700), ultra-compact spectrograph-on-a-chip for millimeter and submillimeter wavelengths is the solution.

Chattopadhyay, Goutam↗