Compact all-metal high-vacuum gate valve for microwave tube research

Abstract

A manually operated all-metal high-vacuum bakable gate valve is described that is designed to attach between an electron gun and an experimental high-power microwave tube. It is designed with a minimal radial extent in order to fit within the 20 cm bore of a magnet that encloses the microwave tube. It also provides a continuous cylindrical metal boundary condition for the electron beam. The valve is used to maintain the electron gun vacuum when the remainder of the tube is brought up to atmospheric pressure for modifications. © 1999 American Institute of Physics.