Study on the Stability of the Electron Beam Generated by Triggered Pseudospark Discharge

During the pseudospark discharge, a connected plasma discharge channel is formed between cathode and anode, with the generation of a high-energy and high-density electron beam. Compared with photocathode, thermionic cathode, and plasma flare cathode, the electron beam generated by the pseudospark discharge has comprehensive advantages in current density and electron beam brightness. The pseudospark-source electron beam has the ability to self-focus due to the unique discharge structure and the formation of an ion channel generated by the beam front. Therefore, it has a very wide application prospect in the field of generating highpower radiation sources, especially in terahertz ^[1] . At present, many scholars mainly studied the pseudospark-source electron beam under self-breakdown discharge ^[2] . Compared with triggered discharge, self-breakdown discharge had certain randomness, so the jitter of electron beam parameters would be larger.