| Autor: |
Perera TA, Zhang R, Liu LJ, Schonert RK, Phan B, Nam SM, Dorsey R, Lopez K, North KC, Ussery C, Roesner RA |
| Jazyk: |
angličtina |
| Zdroj: |
Applied optics [Appl Opt] 2021 Jul 10; Vol. 60 (20), pp. 5880-5890. |
| DOI: |
10.1364/AO.427831 |
| Abstrakt: |
We report on the design, construction, and performance of a custom apparatus built to measure the frequency- and temperature-dependent absorptivity of millimeter-wave light by cosmic analog dusts. We highlight the unique challenges faced as well as a few key innovations that are part of the instrument. Among those is an ultra-compact Fourier transform spectrometer. We have measured its effective frequency range and FWHM resolution to be 150-2100 GHz and ∼45 G H z , respectively. Another innovation is a cold sample positioner whose temperature can be controlled within the range of 3.7-50 K. The use of a pulse-tube cryocooler results in a pulse-synchronous signal that dominates the detector (bolometer) signal. Methods used to address that challenge are also presented. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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