Acceleration of electrons by a lower hybrid wave in a magnetic mirror

In the present study, a theory of electron acceleration by a very large-amplitude lower hybrid wave (LHW) in a magnetic mirror having frequency less than the plasma frequency is developed. The LHW has a Gaussian mode profile and is localized due to the parabolic plasma density and the magnetic field...

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Bibliographic Details
Published in:Journal of the Korean Physical Society 2021, 78(12), , pp.1179-1184
Main Authors: Jeet, Ram, Kumar, Arvind, Kumar, Asheel, Babu, Sanjay, Varma, Ashish
Format: Article
Language:English
Subjects:
Amplitudes
Electron acceleration
Electron beams
Magnetic fields
Magnetic mirrors
Mathematical and Computational Physics
Original Paper
Particle and Nuclear Physics
Phase velocity
Physics
Physics and Astronomy
Plasma density
Plasma frequencies
Theoretical
물리학
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Summary:In the present study, a theory of electron acceleration by a very large-amplitude lower hybrid wave (LHW) in a magnetic mirror having frequency less than the plasma frequency is developed. The LHW has a Gaussian mode profile and is localized due to the parabolic plasma density and the magnetic field profile. The mode can be excited by launching an electron beam from outside into the magnetic mirror. Large-amplitude LWHs have potential to axially trap the electrons when they are moving nearly parallel to the phase velocity, where parallel refers to the direction of the axial magnetic field. The energy of the electrons is enhanced at the instant of interaction between the wave and the electrons. The acceleration of electrons possibly stops as the electrons gets out of phase with the wave. The transverse field of the mode favors stronger mirror confinement and increases the dephasing length. This theory can accelerate electrons up to keV energies and can be employed in the heating of electrons in a magnetic mirror.
ISSN:0374-4884
1976-8524
DOI:10.1007/s40042-021-00163-6