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Electron acceleration by surface plasma waves in the presence of static magnetic field

Published online by Cambridge University Press:  04 March 2015

Prashant Chauhan ,
Deepika Anshu Varshney  and
Vivek Sajal
Prashant Chauhan*
Affiliation:
Department of Physics and Material Science & Engineering, Jaypee Institute of Information Technology, Uttar Pradesh, India
Deepika Anshu Varshney
Affiliation:
Department of Physics and Material Science & Engineering, Jaypee Institute of Information Technology, Uttar Pradesh, India
Vivek Sajal
Affiliation:
Department of Physics and Material Science & Engineering, Jaypee Institute of Information Technology, Uttar Pradesh, India
*
Address correspondence and reprint requests to: P. Chauhan, Department of Physics and Material Science & Engineering, Jaypee Institute of Information Technology, Noida-201307, Uttar Pradesh, India. E-mail: prashant.chauhan@jiit.ac.in
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Abstract

Electron acceleration is studied during the resonant interaction of launched electron beam with the surface plasma wave (SPW) in the presence of static magnetic field. A configuration of two parallel metal sheets separated by a vacuum region supports the SPW of amplitude maximum on the two parallel interfaces and minimum in the middle. Kretschmann geometry is used to excite surface plasma mode by shinning laser on a glass prism. Dispersion relation of SPW is established in the presence of magnetic field and smaller cut-off frequencies are observed as compared with that of without magnetic field. An electron beam launched in the middle region, experiences a longitudinal ponderomotive force due to SPWs and gets accelerated to the velocity of the order of phase velocity of the surface wave. The energy gained by electron is higher in the presence of magnetic field as compared with zero magnetic field. The electron energy and trajectory are also presented for varying parameters such as amplitude of SPW and magnetic field strength. In the present scheme, electron beams can achieve maximum 550 KeV energy for the SPW amplitude ESP = 1.2 × 1011 V/m, plasma frequency ωp = 1.3 × 1016 rad/s, and cyclotron frequency ωc/ωp = 0.05.

Keywords

Electron accelerationMagnetic fieldSurface plasma waves
Type
Research Article
Information
Laser and Particle Beams , Volume 33 , Issue 1 , March 2015 , pp. 109 - 115
Copyright
Copyright © Cambridge University Press 2015 

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