Luminosity Limitations in Linear Colliders Based on Plasma Acceleration

TL;DR

This paper discusses the limitations on beam brightness in plasma-based linear colliders, focusing on phenomena that restrict luminosity despite high acceleration gradients demonstrated experimentally.

Contribution

It analyzes the key physical phenomena that limit beam brightness and collider luminosity in plasma acceleration-based linear colliders.

Findings

High accelerating gradients demonstrated experimentally

Beam brightness limitations identified

Luminosity constraints discussed

Abstract

Particle acceleration in plasma creates a possibility of exceptionally high accelerating gradients and appears as a very attractive option for future linear electron-positron and/or photon-photon colliders. These high accelerating gradients were already demonstrated in a number of experiments. However, a linear collider requires exceptionally high beam brightness which still needs to be demonstrated. In this article we discuss major phenomena which limit the beam brightness of accelerated beam and, consequently, the collider luminosity.