Accelerating and guiding of electron beams in a cone target filled with near-critical-density plasmas

doi:10.1088/1674-1056/adea5b

中国物理B ›› 2025, Vol. 34 ›› Issue (12): 125201-125201.doi: 10.1088/1674-1056/adea5b

Accelerating and guiding of electron beams in a cone target filled with near-critical-density plasmas

Jie-Jie Lan(蓝婕婕), Zhang-Hu Hu(胡章虎)^†, and You-Nian Wang(王友年)

School of Physics, Dalian University of Technology, Dalian 116024, China

收稿日期:2025-04-29 修回日期:2025-06-19 接受日期:2025-07-01 发布日期:2025-12-15
通讯作者: Zhang-Hu Hu E-mail:zhanghu@dlut.edu.cn
基金资助:
Project supported by the Fund of the National Key Laboratory of Plasma Physics (Grant No. 6142A04230204) and the National Natural Science Foundation of China (Grant No. 12075046).

Accelerating and guiding of electron beams in a cone target filled with near-critical-density plasmas

Jie-Jie Lan(蓝婕婕), Zhang-Hu Hu(胡章虎)^†, and You-Nian Wang(王友年)

School of Physics, Dalian University of Technology, Dalian 116024, China

Received:2025-04-29 Revised:2025-06-19 Accepted:2025-07-01 Published:2025-12-15
Contact: Zhang-Hu Hu E-mail:zhanghu@dlut.edu.cn
Supported by:
Project supported by the Fund of the National Key Laboratory of Plasma Physics (Grant No. 6142A04230204) and the National Natural Science Foundation of China (Grant No. 12075046).

摘要/Abstract

摘要： Direct laser acceleration is one of the mechanisms for producing electron bunches carrying up to μC charge, which has attracted much attention in recent decades. Currently, one major challenge for its applications to high-flux x-ray beams and Compton γ-ray sources is the relatively large divergence angle (hundreds of mrad). In this work, a scheme to guide and focus the incident laser and the accelerated electrons is proposed and tested through two-dimensional (2D) particle-in-cell (PIC) simulations. The scheme is based on a hollow cone target (made of aluminum or gold) filled with near-critical-density (NCD) plasmas (pre-ionized polymer foams). Instead of separating the acceleration and focusing processes, it is convenient to simultaneously realize both requirements in such an NCD plasma-filled cone target. PIC simulations reveal that the laser, electrons, and emitted photons can be well-guided along the cone axis in the NCD plasma-filled cone target, preserving the characteristic of high beam charge. Detailed PIC simulations are also performed to show the dependence of the electron energy and charge on the plasma density for a given laser.

关键词: laser-plasma interactions, direct laser acceleration, plasma-filled cone target, electron beams

Abstract: Direct laser acceleration is one of the mechanisms for producing electron bunches carrying up to μC charge, which has attracted much attention in recent decades. Currently, one major challenge for its applications to high-flux x-ray beams and Compton γ-ray sources is the relatively large divergence angle (hundreds of mrad). In this work, a scheme to guide and focus the incident laser and the accelerated electrons is proposed and tested through two-dimensional (2D) particle-in-cell (PIC) simulations. The scheme is based on a hollow cone target (made of aluminum or gold) filled with near-critical-density (NCD) plasmas (pre-ionized polymer foams). Instead of separating the acceleration and focusing processes, it is convenient to simultaneously realize both requirements in such an NCD plasma-filled cone target. PIC simulations reveal that the laser, electrons, and emitted photons can be well-guided along the cone axis in the NCD plasma-filled cone target, preserving the characteristic of high beam charge. Detailed PIC simulations are also performed to show the dependence of the electron energy and charge on the plasma density for a given laser.

Key words: laser-plasma interactions, direct laser acceleration, plasma-filled cone target, electron beams

中图分类号: (Laser-plasma interactions)

52.38.-r

52.38.Kd (Laser-plasma acceleration of electrons and ions) 52.38.Hb (Self-focussing, channeling, and filamentation in plasmas) 52.40.Fd (Plasma interactions with antennas; plasma-filled waveguides)

Jie-Jie Lan(蓝婕婕), Zhang-Hu Hu(胡章虎), and You-Nian Wang(王友年). Accelerating and guiding of electron beams in a cone target filled with near-critical-density plasmas[J]. 中国物理B, 2025, 34(12): 125201-125201.

Jie-Jie Lan(蓝婕婕), Zhang-Hu Hu(胡章虎), and You-Nian Wang(王友年). Accelerating and guiding of electron beams in a cone target filled with near-critical-density plasmas[J]. Chin. Phys. B, 2025, 34(12): 125201-125201.

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Accelerating and guiding of electron beams in a cone target filled with near-critical-density plasmas

Accelerating and guiding of electron beams in a cone target filled with near-critical-density plasmas

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