Transportation of high-current ion and electron beams in the accelerator drift gap in the presence of an additional electron background

• Published in: Plasma physics reports Vol. 41; no. 12; pp. 1028 - 1045
• Main Authors: Karas’, V. I., Kornilov, E. A., Manuilenko, O. V., Tarakanov, V. P., Fedorovskaya, O. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-12-2015
• Subjects: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCELERATORS; Atomic; BEAM CURRENTS; Beams In Plasma; COMPUTERIZED SIMULATION; CURRENT DENSITY; ELECTRON BEAMS; ELECTRONS; FOCUSING; INDUCTION; INJECTION; ION BEAMS; K CODES; MAGNETIC FIELD CONFIGURATIONS; MAGNETIC FIELDS; MAXWELL EQUATIONS; Molecular; Optical and Plasma Physics; Physics; Physics and Astronomy; SPACE CHARGE; VELOCITY; Plasma Physic Report; Electron Beam; Simulation Region; Additional Electron; Virtual Cathode
• ISSN: 1063-780X; 1562-6938
• DOI: 10.1134/S1063780X15120041

The dynamics of a high-current ion beam propagating in the drift gap of a linear induction accelerator with collective focusing is studied using 3D numerical simulations in the framework of the full system of the Vlasov–Maxwell equations (code KARAT). The ion beam is neutralized by a comoving electron beam in the current density and, partially, in space charge, since the velocities of electrons and ions differ substantially. The dynamics of the high-current ion beam is investigated for different versions of additional neutralization of its space charge. It is established that, for a given configuration of the magnetic field and in the presence of a specially programmed injection of additional electrons from the boundary opposite to the ion injection boundary, the angular divergence of the ion beam almost vanishes, whereas the current of the ion beam at the exit from the accelerator drift gap changes insignificantly and the beam remains almost monoenergetic.