Final Physics Design of Proton Improvement Plan-II At Fermilab

TL;DR

This paper details the final physics design of Fermilab's PIP-II linear accelerator, emphasizing strategies to mitigate space charge effects and improve beam quality for future high-intensity accelerators.

Contribution

It introduces novel lattice design strategies that effectively address space charge nonlinearities and collective effects, enhancing beam stability and quality in the PIP-II linac.

Findings

Reduced emittance growth and beam halo

Lower beam loss and improved energy spread

Enhanced beam stability through nonlinear effects mitigation

Abstract

This paper presents the final physics design of the Proton Improvement Plan-II (PIP-II) at Fermilab, focusing on the linear accelerator (Linac) and its beam transfer line. We address the challenges in longitudinal and transverse lattice design, specifically targeting collective effects, parametric resonances, and space charge nonlinearities that impact beam stability and emittance control. The strategies implemented effectively mitigate space charge complexities, resulting in significant improvements in beam quality -- evidenced by reduced emittance growth, lower beam halo, decreased loss, and better energy spread management. This comprehensive study is pivotal for the PIP-II project's success, providing valuable insights and approaches for future accelerator designs, especially in managing nonlinearities and enhancing beam dynamics.