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Transverse electromagnetic Hermite–Gaussian mode-driven direct laser acceleration of electron under the influence of axial magnetic field

Published online by Cambridge University Press:  19 April 2018

Harjit Singh Ghotra ,
Dino Jaroszynski ,
Bernhard Ersfeld ,
Nareshpal Singh Saini ,
Samuel Yoffe  and
Niti Kant
Harjit Singh Ghotra
Affiliation:
Department of Physics, Lovely Professional University, G. T. Road, Phagwara-144411, Punjab, India
Dino Jaroszynski
Affiliation:
Scottish Universities Physics Alliance (SUPA), University of Strathclyde, Glasgow G4 0NG, Scotland, UK
Bernhard Ersfeld
Affiliation:
Scottish Universities Physics Alliance (SUPA), University of Strathclyde, Glasgow G4 0NG, Scotland, UK
Nareshpal Singh Saini
Affiliation:
Department of Physics, Guru Nanak Dev University, Amritsar-143005, Punjab, India
Samuel Yoffe
Affiliation:
Scottish Universities Physics Alliance (SUPA), University of Strathclyde, Glasgow G4 0NG, Scotland, UK
Niti Kant*
Affiliation:
Department of Physics, Lovely Professional University, G. T. Road, Phagwara-144411, Punjab, India
*
Author for correspondence: Niti Kant, Department of Physics, Lovely Professional University, G. T. Road, Phagwara-144411, Punjab, India, E-mail: nitikant@yahoo.com
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Abstract

Hermite–Gaussian (HG) laser beam with transverse electromagnetic (TEM) mode indices (m, n) of distinct values (0, 1), (0, 2), (0, 3), and (0, 4) has been analyzed theoretically for direct laser acceleration (DLA) of electron under the influence of an externally applied axial magnetic field. The propagation characteristics of a TEM HG beam in vacuum control the dynamics of electron during laser–electron interaction. The applied magnetic field strengthens the $\vec v \times \vec B$ force component of the fields acting on electron for the occurrence of strong betatron resonance. An axially confined enhanced acceleration is observed due to axial magnetic field. The electron energy gain is sensitive not only to mode indices of TEM HG laser beam but also to applied magnetic field. Higher energy gain in GeV range is seen with higher mode indices in the presence of applied magnetic field. The obtained results with distinct TEM modes would be helpful in the development of better table top accelerators of diverse needs.

Keywords

Axial magnetic fieldelectron accelerationHermite–Gaussian laserTEM modesvacuum
Type
Research Article
Information
Laser and Particle Beams , Volume 36 , Issue 1 , March 2018 , pp. 154 - 161
Copyright
Copyright © Cambridge University Press 2018 

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