An Innovative Transverse Emittance Cooling Technique using a Laser-Plasma Wiggler

TL;DR

This paper introduces a novel plasma wiggler concept using laser-driven wakefields for beam cooling in linear colliders, potentially improving damping efficiency and reducing system footprint.

Contribution

It presents the design, modeling, and simulation of a plasma wiggler for beam cooling, demonstrating its advantages over traditional magnetic wigglers.

Findings

Effective wiggler field exceeds conventional wigglers by an order of magnitude

Numerical simulations show sinusoidal beam trajectories due to wakefield oscillations

Potential for more compact and efficient damping rings

Abstract

We propose an innovative beam cooling scheme based on laser driven plasma wakefields to address the challenge of high luminosity generation for a future linear collider. For linear colliders, beam cooling is realised by means of damping rings equipped with wiggler magnets and accelerating cavities. This scheme ensures systematic reduction of phase space volume through synchrotron radiation emission whilst compensating for longitudinal momentum loss via an accelerating cavity. In this paper, the concept of a plasma wiggler and its effective model analogous to a magnetic wiggler are introduced; relation of plasma wiggler characteristics with damping properties are demonstrated; underpinning particle-in-cell simulations for laser propagation optimisation are presented. The oscillation of transverse wakefields and resulting sinusoidal probe beam trajectory are numerically demonstrated. The formation of an order of magnitude larger effective wiggler field compared to conventional wigglers is successfully illustrated. Potential damping ring designs on the basis of this novel plasma-based technology are presented and performance in terms of damping times and footprint was compared to an existing conventional damping ring design.