Tunable subpicosecond electron bunch train generation using a transverse-to-longitudinal phase space exchange technique

TL;DR

This paper demonstrates an experimental method to generate tunable subpicosecond electron bunch trains by employing a transverse-to-longitudinal phase space exchange technique, enabling precise control over bunch timing and duration.

Contribution

The study introduces a novel beamline setup that converts horizontally-separated beamlets into temporally separated electron bunches with tunable parameters.

Findings

Successful generation of subpicosecond electron bunch trains

Demonstration of tunable bunch separation and duration

Validation of the phase space exchange technique's effectiveness

Abstract

We report on the experimental generation of a train of subpicosecond electron bunches. The bunch train generation is accomplished using a beamline capable of exchanging the coordinates between the horizontal and longitudinal degrees of freedom. An initial beam consisting of a set of horizontally-separated beamlets is converted into a train of bunches temporally separated with tunable bunch duration and separation. The experiment reported in this Letter unambiguously demonstrates the conversion process and its versatility.