Experiment and simulations of sub-ps electron bunch train generation at Fermilab photoinjectors

TL;DR

This paper reports on the experimental generation of sub-picosecond electron bunch trains at Fermilab's A0 photoinjector and explores numerical methods to extend this technique to even shorter time scales at a superconducting linear accelerator.

Contribution

It demonstrates the successful generation of tunable sub-ps electron bunch trains and investigates their potential extension to shorter durations at a new superconducting accelerator.

Findings

Successful experimental generation of sub-ps electron bunch trains

Numerical exploration of extending bunch train generation to shorter time scales

Potential applications in modern accelerator beam requirements

Abstract

Recently the generation of electron bunch trains with sub-picosecond time structure has been experimentally demonstrated at the A0 photoinjector of Fermilab using a transverse-longitudinal phase-space exchange beamline. The temporal profile of the bunch train can be easily tuned to meet the requirements of the applications of modern accelerator beams. In this paper we report the A0 bunch-train experiment and explore numerically the possible extension of this technique to shorter time scales at the Fermilab SRF Accelerator Test Facility, a superconducting linear electron accelerator currently under construction in the NML building.