Magnetic Compressors for MeV-UED

TL;DR

This paper explores the design and simulation of magnetic compressors for MeV-UED, demonstrating their potential to achieve ultra-short bunch lengths and minimal timing jitter without adding jitter from RF systems.

Contribution

It introduces principles for designing magnetic compressors specifically for MeV-UED and provides simulation results showing their effectiveness in reducing bunch length and jitter.

Findings

Achieved 11 fs bunch length in simulations.

Reduced arrival time jitter to 8 fs.

Maintained small emittance growth.

Abstract

Magnetic compressors offer an attractive path toward jitter-free bunch compression in MeV-UED. Compared with RF bunchers, magnetic compressors do not introduce additional timing jitter and can be configured to minimize timing jitter due to upstream energy fluctuation. In this work we discuss the principles of designing magnetic compressors for MeV-UED. Start-to-end simulation of a dogleg compressor is presented. Results show a bunch length of 11 fs and arrival time jitter of 8 fs can be achieved at 100 fC charge with small emittance growth.