Longitudinal compression of macro relativistic electron beam

TL;DR

This paper introduces a novel magnetic field-based method for compressing relativistic electron beams over hundreds of meters, enabling higher compression ratios and power levels than traditional setups.

Contribution

It proposes a new longitudinal bunch train compression technique using spiral electron trajectories in a uniform magnetic field, with analytical and numerical validation.

Findings

Potential for ultrahigh power electron beams

Higher compression ratios than traditional methods

Feasibility demonstrated through simulations

Abstract

We presented a novel concept of longitudinal bunch train compression capable of manipulating relativistic electron beam in range of hundreds of meters. This concept has the potential to compress the electron beam with a high ratio and raise its power to an ultrahigh level. The method utilizes the spiral motion of electrons in a uniform magnetic field to fold hundreds-of-meters-long trajectories into a compact set-up. The interval between bunches can be adjusted by modulating their sprial movement. The method is explored both analytically and numerically. Compared to set-up of similar size, such as chicane, this method can compress bunches at distinct larger scales and higher intensities, opening up new possibilities for generating beam with ultra-large energy storage.