Target-Plasma Expansion Induced by 20-MeV Intense Electron Beam

Author

Zhu, Jun ; Yu, Haijun ; Jiang, Xiaoguo ; Cheng, Nan ; Wang, Yuan

Author_Institution

Inst. of Fluid Phys., China Acad. of Eng. Phys., Mianyang, China

Volume

38

Issue

10

fYear

2010

Firstpage

2873

Lastpage

2876

Abstract

The typical response of an X-ray converter material to the passage of a high-current relativistic electron beam is ionization and rapid dispersal. Experiments have been performed on the Dragon-I linear induction accelerator to study this phenomenon. In this paper, we report the fast photography and Faraday cup experiments performed to quantify the plasma-plume expansion and velocities of ions. Monte Carlo simulation shows that the energy deposition in a multilayer target is about 7 kJ/g. By solving the Saha equation, the ionization degree of the plasma was figured out to be only 14%.

Keywords

Monte Carlo methods; ionisation; plasma diagnostics; plasma simulation; plasma temperature; plasma-beam interactions; relativistic electron beams; Dragon-I linear induction accelerator; Faraday cup experiments; Monte Carlo simulation; Saha equation; X-ray converter material; electron volt energy 20 MeV; energy deposition; fast photography; high-current relativistic electron beam passage; intense electron beam; ion velocities; ionization degree; multilayer target; plasma-plume expansion; rapid dispersal; target-plasma expansion; Electron beams; Ionization; Laser beams; Plasmas; Beam–target interaction; converter target; intense electron beam; plasma plume;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/TPS.2010.2061869

Filename

5559493