High throughput data streaming of individual longitudinal electron bunch profiles in a storage ring with single-shot electro-optical sampling

TL;DR

This paper demonstrates a high-throughput, single-shot electro-optical sampling method for real-time monitoring of electron bunch profiles in a storage ring, enabling detailed analysis of bunch dynamics at MHz repetition rates.

Contribution

It introduces a novel implementation of ultra-fast electro-optical sampling with a line array camera for real-time electron bunch profile detection in a storage ring.

Findings

Successful detection of longitudinal electron bunch profiles at MHz rates

Detailed data processing methods for charge density profile calculation

Observation of bunch profile dynamics, including synchrotron oscillations

Abstract

The development of fast detection methods for comprehensive monitoring of electron bunches is a prerequisite to gain comprehensive control over the synchrontron emission in storage rings with their MHz repetition rate. Here, we present a proof-of-principle experiment with at detailed description of our implementation to detect the longitudinal electron bunch profiles via single-shot, near-field electro-optical sampling at the Karlsruhe Research Accelerator (KARA). Our experiment is equipped with an ultra-fast line array camera providing a high-throughput MHz data stream. We characterize statistical properties of the obtained data set and give a detailed description for the data processing as well as for the calculation of the charge density profiles, which where measured in the short-bunch operation mode of KARA. Finally, we discuss properties of the bunch profile dynamics on a coarse-grained level on the example of the well-known synchrotron oscillation.