Laboratory Tests of Laser Control of Electron Beams for Future Colliders

TL;DR

This paper discusses laboratory tests of laser techniques for controlling electron beams, aiming to improve collider performance and beam collimation, with simulations and experimental setups described for FACET-II and future FCC-ee applications.

Contribution

It presents the first laboratory test program of laser-based electron beam control methods with detailed simulations and experimental plans for FACET-II and FCC-ee.

Findings

Simulations of laser-beam interactions at FACET-II

Design of experimental setup and diagnostics

Scaling analysis for future FCC-ee applications

Abstract

Laser-driven Compton backscattering (CBS) has been proposed as method for controlling the intensity of colliding bunches in the FCC-ee so as to avoid the flip-flop instability caused by intensity asymmetry in colliding bunches. Laser-based collimation has also been proposed as an indestructible collimator for high-intensity electron beams. We have initiated a laboratory-based test program of these concepts with the E344 experiment at FACET-II. In this paper, we describe simulations of laser-beam interactions at FACET-II and the relevant scaling for FCC-ee. We also describe the experimental setup and diagnostics that will be used to make the measurements at FACET-II.