Title :
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
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;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2010.2061869
