Characteristics of pseudospark discharge and its applications

Activity: Talk or presentation typesOral presentation


A pseudospark (PS) discharge is a low-pressure discharge process that is characterized by a rapid breakdown phase with the generation of a high current density electron beam. The discharge process includes the pre-breakdown (Townsend discharge) phase to ignite the discharge, the hollow-cathode discharge phase in which a high-quality, high-energy electron beam can be produced, and the super-dense glow discharge phase with a high discharge current. The extracted electron beam can be transported at a distance of a few tens of centimeters without an external magnetic field due to the existence of an ion channel in the propagation path. The electron beam generated from the PS discharge has high brightness (~1E12A/m2rad2) and a large current density (~1E4A/cm2). Therefore it can be used for: plasma processing for material treatment; extreme-ultraviolet light sources for lithography and; generation of high-power millimeter/terahertz wave radiation. The beam current at the super-dense glow discharge stage can reach tens of kiloamperes in nanoseconds, and it can be used as high-power, high-current fast switches in pulsed power systems.
This paper presents the simulation of pseudospark discharge process [1], the experimental study of the characteristics of pseudospark discharge [2], and the application to use the pseudospark discharge generated electron beam to produce high-power millimeter/terahertz wave radiation [3].
Period21 Nov 2022
Event title9th International Plasma Science and Entrepreneurship
Event typeConference
LocationYork, United KingdomShow on map
Degree of RecognitionInternational