Kilo-Tesla axial magnetic field generation with high intensity spin and orbital angular momentum beams
Abstract
Absorption of angular momentum from a high intensity laser pulse can lead to the generation of strong axial magnetic fields in plasma. The effect, known as the inverse Faraday effect, can generate kilo-Tesla strength, multipicosecond, axial magnetic fields extending over hundreds of microns in underdense plasma. In this paper we explore the effect with ultrahigh intensity circularly polarized Gaussian beams and linearly polarized orbital angular momentum beams comparing analytic expressions with three-dimensional particle-in-cell simulations. We develop a model for the transverse magnetic field profiles, introduce a model for the temporal decay, and show that while the magnetic field strength is independent of plasma density, it has a strong dependence on the laser beam waist.
- Publication Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE; National Science and Engineering Research Council of Canada; United Kingdom Engineering and Physical Sciences Research Council
- OSTI Identifier:
- 1835629
- Alternate Identifier(s):
- OSTI ID: 1843563
- Report Number(s):
- LLNL-JRNL-826556
Journal ID: ISSN 2643-1564; PPRHAI; 043180
- Grant/Contract Number:
- AC52-07NA27344; RGPIN-2019-05013; EP/G054950/1; EP/G056803/1; EP/G055165/1; EP/M022463/1
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Research
- Additional Journal Information:
- Journal Name: Physical Review Research Journal Volume: 3 Journal Issue: 4; Journal ID: ISSN 2643-1564
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; fast particle effects; plasma acceleration; high intensity laser; accelerators; beams
Citation Formats
Longman, Andrew, and Fedosejevs, Robert. Kilo-Tesla axial magnetic field generation with high intensity spin and orbital angular momentum beams. United States: N. p., 2021.
Web. doi:10.1103/PhysRevResearch.3.043180.
Longman, Andrew, & Fedosejevs, Robert. Kilo-Tesla axial magnetic field generation with high intensity spin and orbital angular momentum beams. United States. https://doi.org/10.1103/PhysRevResearch.3.043180
Longman, Andrew, and Fedosejevs, Robert. Tue .
"Kilo-Tesla axial magnetic field generation with high intensity spin and orbital angular momentum beams". United States. https://doi.org/10.1103/PhysRevResearch.3.043180.
@article{osti_1835629,
title = {Kilo-Tesla axial magnetic field generation with high intensity spin and orbital angular momentum beams},
author = {Longman, Andrew and Fedosejevs, Robert},
abstractNote = {Absorption of angular momentum from a high intensity laser pulse can lead to the generation of strong axial magnetic fields in plasma. The effect, known as the inverse Faraday effect, can generate kilo-Tesla strength, multipicosecond, axial magnetic fields extending over hundreds of microns in underdense plasma. In this paper we explore the effect with ultrahigh intensity circularly polarized Gaussian beams and linearly polarized orbital angular momentum beams comparing analytic expressions with three-dimensional particle-in-cell simulations. We develop a model for the transverse magnetic field profiles, introduce a model for the temporal decay, and show that while the magnetic field strength is independent of plasma density, it has a strong dependence on the laser beam waist.},
doi = {10.1103/PhysRevResearch.3.043180},
journal = {Physical Review Research},
number = 4,
volume = 3,
place = {United States},
year = {Tue Dec 14 00:00:00 EST 2021},
month = {Tue Dec 14 00:00:00 EST 2021}
}
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