Field calculations, single-particle tracking, and beam dynamics with space charge in the electron lens for the Fermilab Integrable Optics Test Accelerator

TL;DR

This paper discusses the design, optimization, and analysis of an electron lens for Fermilab's Integrable Optics Test Accelerator, focusing on nonlinear dynamics, space-charge effects, and beam stability.

Contribution

It introduces the design principles and magnetic configuration for the electron lens, and uses simulations to analyze beam dynamics and current limits at high intensities.

Findings

Optimized electron path using single-particle tracking.

Estimated current limits and profile distortions with particle-in-cell simulations.

Provided insights into space-charge effects on beam stability.

Abstract

An electron lens is planned for the Fermilab Integrable Optics Test Accelerator as a nonlinear element for integrable dynamics, as an electron cooler, and as an electron trap to study space-charge compensation in rings. We present the main design principles and constraints for nonlinear integrable optics. A magnetic configuration of the solenoids and of the toroidal section is laid out. Single-particle tracking is used to optimize the electron path. Electron beam dynamics at high intensity is calculated with a particle-in-cell code to estimate current limits, profile distortions, and the effects on the circulating beam. In the conclusions, we summarize the main findings and list directions for further work.