Foil-less plasma-filled diode for HPM generator

International Congress on Energy Fluxes and Radiation Effects

Eltchaninov, A.A.^1 ; Kovalchuk, B.M.^1 ; Kurkan, I.K.^1,2 ; Zherlitsyn, A.A.^1

Institute of High Current Electronics, 2/3 Akademichesky Ave., Tomsk

634055, Russia^1

National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk

634050, Russia^2

关键词: Electrodynamic systems;    Electron beam energy;    Electron beam generation;    Electron beam transport;    Explosive emissions;    Source of electrons;    Transport channel;    Virtual cathodes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/552/1/012031/pdf
DOI  :  10.1088/1742-6596/552/1/012031

来源: IOP

【 摘 要 】

Plasma-filled diode regarded as perspective source of electron beam feeding HPM generator of GW power level, comparing to conventional explosive emission vacuum diode. Electron beam generation occurs in plasma double layer, where plasma boundary plays as an anode. It allows cancelling the usage of anode foils or grids in HPM generators with the virtual cathode, which could limit its life time to few shots. The presence of ions in the e-beam drift space could raise the limiting current for a drift space, but it could affect to microwave generation also. Sectioned plasma-filled diode with beam current of about 100 kA, electron beam energy of about 0.5 MV and beam current density of 1-10 kA/cm2was realized. Cylindrical transport channel with the diameter of 200 mm and the length of about 30 cm was attached to the diode. Beam current measurements in a drift space were performed. Computer simulations of electron beam transport with the presence of ions were carried out with the 2.5D axisymmetric version of PiC-code KARAT. Obtained results would help optimizing electrodynamic system of HPM generator subjected to the presence of ions.