Influence of the laser intensity on the resistive filamentation during intense electron beam transport in aluminum targets

被引：0

作者：

Zhang, Zixuan ^{[1
]}

Wang, Weiquan ^{[1
]}

Yang, Xiaohu ^{[2
]}

Zhang, Pudu ^{[1
]}

Zhou, Hongyu ^{[1
]}

Zou, Debin ^{[1
]}

Xu, Han ^{[3
]}

Yin, Yan ^{[1
]}

机构：

[1] Natl Univ Def Technol, Dept Phys, Changsha 410073, Peoples R China

[2] Natl Univ Def Technol, Dept Nucl Sci & Technol, Changsha 410073, Peoples R China

[3] Natl Univ Def Technol, Sch Comp Sci, Changsha 410073, Peoples R China

来源：

EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2025年

基金：

中国国家自然科学基金;

关键词：

ION-ACCELERATION;

D O I：

10.1140/epjs/s11734-025-01547-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The influence of laser intensity on the resistive filamentation during intense electron beam transport in aluminum targets is investigated through theoretical analysis and three-dimensional hybrid simulations. Analysis of linear filamentation instabilities indicates that resistive filamentation is more likely to occur under high laser-intensity conditions. Our simulations reveal the underlying physical mechanisms: when the laser intensity is below a critical value (corresponding to the collimation parameter Pi rc\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\Pi }_{rc}$$\end{document}=1), the strong self-generated resistive field effectively suppresses electron beam filamentation, resulting in collimated transport. As the laser intensity increases, the enhanced current density, the larger divergence angle of the electron beam, and higher laser energy conversion efficiency counteract the pinching effect of the resistive magnetic field. This leads to a significant filamentation, with the current magnitude of each filament approaching the Alfv & eacute;n current limit. Additionally, our study demonstrates that higher energy conversion efficiency increases the incident current density, thereby promoting filamentation instability, while larger initial divergence angles weaken the magnetic collimation effect, further enhancing filamentation.

引用

页数：16