Low-energy high-current electron beam generation in plasma system and beam-plasma interaction

• Datum: 2007
• Hauptverfasser: Agafonov, A.V., Bogachenkov, V.A., Suleymanov, O.S., Tarakanov, V.P.
• Format: Artikel
• Sprache: English
• Veröffentlicht: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2007
• Schriftenreihe: Вопросы атомной науки и техники
• Schlagworte: Plasma electronics
• Online Zugang: http://dspace.nbuv.gov.ua/handle/123456789/110513
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Low-energy high-current electron beam generation in plasma system and beam-plasma interaction / A.V. Agafonov, V.A. Bogachenkov, O.S. Suleymanov, V.P. Tarakanov // Вопросы атомной науки и техники. — 2007. — № 1. — С. 133-135. — Бібліогр.: 6 назв. — англ.

The review of results of experimental investigations and computer simulations of low-energy high-current electron beam generation in a low-impedance system and dynamics of beam-plasma system are given. The system includes a long plasma-filled diode, an auxiliary thermionic cathode and an explosive emission cathode. The auxiliary cathode is used to generate a low-current, low-voltage electron beam to form long plasma anode by means of a residual gas ionisation in an external longitudinal magnetic field. The high-current low-energy electron beam is generated from the explosive emission cathode embedded in preliminary prepared plasma. Peculiarities of the system are due to: 1) the generation of electron beams with currents exceeding Alfven’s limit; 2) the charge density of the beam close to the plasma density. These peculiarities complicate beam-plasma interaction significantly due to sharp non-uniform distribution of the beam current density, dominant transverse motion of the beam electrons and redistribution of ion-plasma density under the influence of fields. Computer simulation was performed using electromagnetic PIC code KARAT for different geometry’s of the system.