Abstract

The use of a static magnetic field with a modest intensity in the conventional vacuum laser acceleration scheme has been investigated. It has been found that the applied magnetic field can break the symmetry of the laser acceleration and deceleration phases experienced by the electrons after they leave the focal region, allowing the electrons to be accelerated in the focal region to gain more energy from the combined fields of the laser and the static magnetic field. The later process is the second stage acceleration taking place in the region outside the laser focal area. Explanations of these interaction features based on analytical calculations and simulations are presented.

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