Plasma Lens Prototype Progress: Plasma Diagnostics And Particle Tracking For ILC e+ Source

TL;DR

This paper reports on the development of a plasma lens prototype for the ILC positron source, including plasma diagnostics, particle tracking, and optimization techniques to improve beam focusing and positron yield.

Contribution

It introduces a new plasma lens prototype with advanced diagnostics and a novel particle tracking code utilizing Bayes optimization for enhanced beam focusing.

Findings

Prototype development progress and plasma diagnostics results

Initial insights from particle tracking simulations

Potential improvements in positron yield and beam focusing

Abstract

In recent years, the concept of high-gradient, symmetric focusing using active plasma lenses has regained notable attention owing to its potential benefits in terms of compactness and beam dynamics when juxtaposed with traditional focusing elements. An enticing application lies in the optical matching of extensively divergent positrons originating from the undulator-based ILC positron source, thereby enhancing the positron yield in subsequent accelerating structures. Through a collaboration between the University of Hamburg and DESY Hamburg, a scaled-down prototype for this purpose has been conceptualized and fabricated. In this presentation, we provide an overview of the ongoing progress in the development of this prototype. Furthermore, first insights into the development of a particle tracking code especially designed for plasma lenses with implemented Bayes optimization, are given.