Abstract

We propose a feasible novel scheme of efficiently accelerating an electron bunch through a targeted-designed transverse-field configuration that consists of a laser and a DC magnetic field. Its merit over well-known longitudinal-field acceleration is the independence of the acceleration quality on the initial phase of the accelerated charge relative to the accelerator. Such an initial phase is a probability factor that is difficult to control. Strict theory and numerical experiment demonstrate that under available not-too-high strength, such as $ {10^{16}}\;{\rm W}/{{\rm cm}^2} $ and $ 1 \sim 10\; {\rm Tesla} $, electronic energy gain in such a configuration can reach giga-electronvolt level over a time scale lasting 1600-fold laser cycles. The cost of achieving such an “accelerating ability” in the transverse field acceleration is far below that in the longitudinal-field acceleration. Other aspects of acceleration quality in such a transverse-field configuration also display the advantage of the configuration in achieving a compact, high-gain accelerator.

© 2020 Optical Society of America

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