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  • Letter
  • Open Access

Generating axial magnetic fields via two plasmon decay driven by a twisted laser

Yu Ji1, Chang-Wang Lian2,3, Yin Shi2, Rui Yan1,4,*, Shihui Cao5, Chuang Ren5,6, and Jian Zheng2,4

  • 1Department of Modern Mechanics, University of Science and Technology of China, Hefei 230026, China
  • 2Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
  • 3Laser Fusion Research Center, China Academy of Engineering Physics, Sichuan, Mianyang 621900, China
  • 4Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
  • 5Department of Mechanical Engineering, University of Rochester, Rochester, New York 14627, USA
  • 6Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA

  • *ruiyan@ustc.edu.cn

Phys. Rev. Research 5, L022025 – Published 5 May, 2023

DOI: https://doi.org/10.1103/PhysRevResearch.5.L022025

Abstract

We propose an efficient way of axial magnetic fields generation in a nonrelativistic laser intensity regime by using a twisted light carrying orbital angular momentum (OAM) to stimulate two-plasmon decay (TPD) in a plasma. The growth of TPD driven by an OAM light in a Laguerre-Gauss (LG) mode is investigated through three-dimensional fluid simulations and theory. A theory based on the assumption that the electron plasma waves (EPWs) are locally driven by a number of local plane-wave lasers predicts the maximum growth rate proportional to the peak amplitude of the pump laser field and is verified by the simulations. The OAM conservation during its transportation from the laser to the TPD daughter EPWs is shown by both the theory and the simulations. The theory predicts generation of ≈40 T axial magnetic fields through the OAM absorption via TPD, which has perspective applications in the field of high energy density physics.

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