18-19 June 2018
Fermilab, Wilson Hall
US/Central timezone
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Contribution Oral Presentation

Fermilab, Wilson Hall - One West

A compact millimeter-wavelength Fourier-transform spectrometer


  • Mr. Zhaodi PAN

Primary authors



Fourier Transform Spectrometers (FTSs) have been widely used in many fields for characterizing the power spectrum of radiation. In this talk we present development of an FTS operating between 50 GHz and 330 GHz. Our FTS design features a small size of 15"x10"x3" and weighs only 13 lbs. The hardware, operating software, and analysis software for the FTS have been standardized to make the production and application easy. The FTS has a throughput of 100 mm^2 sr and a frequency resolution of 4 GHz, with sensitivity to both polarization components. The optical transfer efficiency is 92%±5%, and the modulation contrast is -55±3% with a band-defining filter. Beam and frequency distortion properties are characterized by a frequency-mapping experiment and compared to ray-tracing simulations. We also discuss applications to detector and material characterizations, including detector spectrum measurements for the South Pole Telescope.