2017 IEEE Pulsed Power Conference

Numerical Simulations of Electron Beam Neutralization by Backstreaming Ions in LIA

20 Jun 2017, 13:30

1h 30m

Hall 4 / Cambridge (Hilton Brighton Metropole Hotel)

Board: 23

Poster Particle Beam and Accelerator Technologies Poster session II - Particle Beam and Accelerator Technologies

Speaker

Mr Valerii Danilov (Budker Institute of Nuclear Physics)

Description

This work presents numerical modeling of interaction between intense electron beam and target plasma in LIA accelerator. Well-focused electron beam hit tantalum target that causes producing of high-density target plasma. This plasma consists of electrons and ions of tantalum and different contaminations adsorbed on the target surface [1]. Because of negative potential of the electron beam, ions from target plasma forms upstreaming flow. Interaction between electron beam and ions causes disrupting effect on beam's focusing. We used particle-in-cell code KARAT [2]. For modeling we used the next parameters: electron beam energy 2 MeV, current 2 kA, beam radius 5 cm, focusing length 10 cm.

[1] Hai-jun Yu, et. al. Numerical simulations and experiments of beam-target interaction for multipulse bremsstrahlung converter applications// PHYSICAL REVIEW SPECIAL TOPICS - ACCELERATORS AND BEAMS, 15, 060401 (2012).
[2] V. P. Tarakanov, User's Manual for Code KARAT// Berkley Research Associates, Springfield, VA (1992).