Acceleration of relativistic electrons by an intense focused laser radiation combined with a static homogeneous almost collinear magnetic field
Abstract
Interaction of electrons with a focused laser field combined with a static magnetic field is considered. The gain of energy acquired by the electron after crossing the laser focus is found. Optimal conditions for efficient acceleration of electrons are determined. The efficiency of acceleration is shown to be maximal in the case of almost, but not exactly, coinciding directions of a static magnetic field and of propagation of the laser radiation (almost collinear geometry). A small optimal angle between these two directions is shown to be on the order of the inverse relativistic factor 1/gamma. An optimal ratio of the `transverse to longitudinal' electron energy in a static magnetic field and optimal conditions of light focusing are found. The optimized electron energy gain Deltaepsilon sub opt is shown to be a linear function of gamma. It is shown that Deltaepsilon sub opt can be rather large at a moderately high intensity of the laser radiation in the focus.
 Publication:

IEEE Journal of Quantum Electronics
 Pub Date:
 January 1992
 DOI:
 10.1109/3.119522
 Bibcode:
 1992IJQE...28..265A
 Keywords:

 Electron Acceleration;
 Electron Energy;
 Laser Outputs;
 Magnetic Fields;
 Airy Function;
 Larmor Radius;
 Maxwell Equation;
 Plane Waves;
 Lasers and Masers