Dynamics and Cooling of Modulated Bunches in Bend

TL;DR

This paper investigates how space charge effects influence the dynamics and energy spread of modulated particle bunches in bending magnets, revealing conditions for bunch cooling and potential ordering improvements.

Contribution

It introduces a model for Coulomb force effects on modulated bunches in bending magnets and identifies conditions for maximal bunch cooling.

Findings

Space charge causes bunch energy spread reduction during compression.

Conditions for optimal bunch cooling are derived.

Potential for improved bunch ordering is explored.

Abstract

The influence of the space charge fields on the dynamics of the particles of the bunch, which is moved in a bending magnet is calculated. It is shown, that such influence of the Coulomb force on the energy of the particles of a modulated beam causes in the decreasing of the bunch energy spread during the compression due to energy deviation along the compressed bunch, i.e. bunch cooling. The necessary conditions of the maximal cooling are found. The attainable ordering of the bunch is investigated.