Kilo-Tesla axial magnetic field generation with high intensity spin and orbital angular momentum beams
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.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE; National Science and Engineering Research Council of Canada; United Kingdom Engineering and Physical Sciences Research Council
- Grant/Contract Number:
- AC52-07NA27344; RGPIN-2019-05013; EP/G054950/1; EP/G056803/1; EP/G055165/1; EP/M022463/1
- OSTI ID:
- 1835629
- Alternate ID(s):
- OSTI ID: 1843563
- Report Number(s):
- LLNL-JRNL-826556; PPRHAI; 043180
- Journal Information:
- Physical Review Research, Journal Name: Physical Review Research Vol. 3 Journal Issue: 4; ISSN 2643-1564
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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