The Millimeter Wave Plasma Diagnostics of the Guns Used for the Accelerators Operating on the Basis of the Virtual Cathode

Experimental plasma gun testing bench on the basis of the virtual cathode has been presented. A number of plasma characteristics such as discharge voltage, plasma temperature, glow dynamics and others are estimated. The interferometer scheme was developed, successfully installed, and preliminarily tested on the experimental testing bench. Obtained results will be used for electron concentration measurement of plasma in the millimeter wave band.