A compact hot-nozzle Fourier-transform microwave spectrometer | Zendy

Marlin D. Harmony | Zendy; Kyle A. Beran | Zendy; Deanna M. Angst | Zendy; K. Ratzlaff | Zendy

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A compact hot-nozzle Fourier-transform microwave spectrometer

Author(s) -

Marlin D. Harmony,

Kyle A. Beran,

Deanna M. Angst,

K. Ratzlaff

Publication year - 1995

Publication title -

review of scientific instruments

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.605

H-Index - 165

eISSN - 1089-7623

pISSN - 0034-6748

DOI - 10.1063/1.1146150

Subject(s) - spectrometer , materials science , microwave , resonator , nozzle , microwave cavity , optics , analytical chemistry (journal) , fourier transform spectroscopy , fourier transform , fourier transform infrared spectroscopy , nuclear magnetic resonance , optoelectronics , physics , chemistry , chromatography , quantum mechanics , thermodynamics

A newly constructed pulsed nozzle, Fourier‐transform microwave spectrometer utilizes a Fabry–Perot cavity consisting of spherical resonators having diameters of only 10 cm. Tests of this very compact‐cavity system show that its sensitivity is only slightly lower than that of a comparably configured system of the Balle–Flygare design having resonators with diameters of 36 cm. With a volume 50 times smaller than in conventional systems, the compact cavity also requires a much smaller vacuum chamber which can be pumped by a relatively small 6 in. diffusion pump. The system includes an integral ceramic nozzle which can be heated to temperatures above 1000 °C. Spectrometer characteristics have been demonstrated by means of experiments on OCS isotopomers in ground and excited vibrational states, ArOCS complexes, and chloroketene, a reactive intermediate formed by pyrolysis of chloroacetylchloride.

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