High Mode Tunable Cavity for Microwave-Gas Interactions

Abstract

A high‐Q resonant microwave cavity, operating in the TE_01n (n=10, 11) mode, is described. A fused quartz liner, with suitable inlet and pumping lines, is used to contain gases, so that interactions between the molecular transitions and the electromagnetic radiation can be generated. Techniques are discussed for suppression of unwanted modes of oscillation, for dielectric tuning of the cavity, and for elimination of radiation through a large port.