Transport dynamics study of laser-accelerated proton beams and design of double achromatic beam translation system

TL;DR

This paper presents a novel double achromatic beam translation system for laser-accelerated proton beams, effectively reducing aberrations and maintaining beam quality for practical applications.

Contribution

It introduces a new DABTS design based on weak-focusing magnets that achieves achromatic transmission and bunch length compression for laser-driven proton beams.

Findings

Achieves near-ideal point-to-point optics

Reduces chromatic aberrations effectively

Enables better beam quality preservation

Abstract

Proton beams generated from laser acceleration show merit for their unique spatial (micron-size) and temporal (picosecond) properties, which make them desirable for many potential applications. However, the large energy spread and divergence angle make it difficult to maintain these beam properties after delivery. This hinders the wide application of laser acceleration. In this paper, we design a double achromatic beam translation system (DABTS), based on weak-focusing magnets, to realize achromatic transmission in both the horizontal and vertical directions, and compress the bunch length of the delivered proton beam at the same time. We make use of fringe angles and special steering magnets to effectively reduce the influence of chromatic aberrations and high-order nonlinear terms and realize close to ideal point-to-point optics. We believe this work contributes to the ongoing effort to apply laser accelerators to a variety of fields.