In this study, we explore a novel approach to accelerating electrons by utilizing Bessel beam generated from an axicon lens alongside an externally applied wiggler magnetic field. Bessel beams are unique in their ability to maintain a non-diffracting profile over long distances, making them ideal for the efficient acceleration of electrons. The axicon lens converts a conventional Gaussian beam into a Bessel beam, creating a central bright spot surrounded by concentric rings, which enhances the stability of the interaction. Among the various orders of Bessel beam, the zeroth-order beam is especially advantageous due to its lower divergence and stronger focusing capabilities, leading to more efficient electron acceleration compared to higher-order beams. By utilizing the characteristics of zeroth-order Bessel beam and the oscillating effects of the wiggler magnetic field, we investigate the energy gain and trajectory modulation of electrons in this system. Our findings demonstrate that the presence of the wiggler field significantly enhances the focusing power of Bessel beam, resulting in enhanced acceleration rates compared to a fundamental Gaussian beam under identical conditions.
Rajput et al. (Mon,) studied this question.