Relaxation and Emittance Growth of a Thermal Charged-Particle Beam

TL;DR

This paper introduces a theory to accurately predict the distribution, emittance growth, and halo formation of thermal charged-particle beams after relaxation, validated by simulations.

Contribution

The paper presents a new theoretical framework for calculating beam relaxation, emittance growth, and halo formation in thermal charged-particle beams.

Findings

Excellent agreement between theory and simulations.

Accurate prediction of particle evaporation and halo formation.

Quantitative analysis of emittance growth.

Abstract

We present a theory that allows us to accurately calculate the distribution functions and the emittance growth of a thermal charged-particle beam after it relaxes to equilibrium. The theory can be used to obtain the fraction of particles, which will evaporate from the beam to form a halo. The calculated emittance growth is found to be in excellent agreement with the simulations.