Experimental demonstration of cascaded round-to-flat and flat-to-round beam transformations

TL;DR

This paper demonstrates a novel cascaded beam transformation method that converts magnetized electron beams into flat beams, transports them over long distances, and then re-magnetizes them, using simulations and laboratory experiments.

Contribution

It introduces a practical cascaded transformation technique for beam manipulation, combining numerical simulation and experimental validation.

Findings

Successful numerical simulation of cascaded transformations

Laboratory experiments confirming the method's feasibility

Potential for improved beam transport in collider applications

Abstract

Magnetized beams beam with significant canonical angular momentum are critical to electron cooling of hadron beams such as contemplated in next-generation hadron and electron-ion colliders. The transport of magnetized electron beams over long distances in a locally non-axisymmetric external field is challenging. An alternative is to transform the beam into an uncoupled "flat beam", transport the produced "flat" beam over a long distance, and reintroduce the cross-plane coupling to "re-magnetize" the beam. In this paper, we demonstrate via numerical simulation and laboratory experiments such a cascaded-transformation approach.