A MILLIMETER WAVE CAVITY SPECTROMETER FOR PPM ASSAYING OF ATMOSPHERIC GAS SAMPLES

Loading...
Thumbnail Image

Date

1993

Journal Title

Journal ISSN

Volume Title

Publisher

Ohio State University

Research Projects

Organizational Units

Journal Issue

Abstract

We have constructed a compact servo-controlled Fabry-Perot cavity spectrometer operating through the 60 -190 GHz band which uses frequency modulation in a clean PTFE cell to carry out nondestructive assaying of atmospheric samples admitted through switched piezoelectric valves. 20 MHz width spectral scans of isotopic species in excited states of $OCS, H_{2}O, H_{2}CO$ and other molecules present at a few ppm concentrations are presented. The linearity of detection over decades of concentration ratio in various mixes will be discussed.

Description

Author Institution: Department of Instrumentation and Analytical Science, UMIST; Schuster Laboratory, University of Manchester

Keywords

Citation