Helical relativistic electron beam and THz radiation

TL;DR

This paper proposes a THz laser generation method using a helical relativistic electron beam in a strong magnetic field, achieving higher amplification rates and producing high-power, short-duration THz radiation.

Contribution

It introduces a novel scheme for THz laser generation with significantly enhanced amplification compared to conventional free electron lasers.

Findings

Achieves THz radiation in the 0.5 to 3 THz range

Produces millijoule energy pulses with tens of picoseconds duration

Generates gigawatt-level temporal power

Abstract

A THz laser generation utilizing a helical relativistic electron beam propagating through a strong magnetic field is discussed. The initial amplification rate in this scheme is much stronger than that in the conventional free electron laser. A magnetic field of the order of Tesla can yield a radiation in the range of 0.5 to 3 THz, corresponding to the total energy of mJ and the duration of tens of pico-second, or the temporal power of the order of GW.