Simulation of deflecting structures for dielectric laser driven accelerators

TL;DR

This paper investigates various dielectric laser-driven deflecting structures using particle-in-cell simulations, aiming to develop compact beam manipulation and diagnostic tools for dielectric laser accelerators, with potential applications in ultra short electron bunch diagnostics.

Contribution

It introduces and compares different dielectric laser-driven deflecting structures for beam manipulation and diagnostics in dielectric laser accelerators.

Findings

Certain structures show high suitability for beam deflection.

Potential for use as diagnostic devices for ultra short electron bunches.

Comparison highlights advantages and limitations of each concept.

Abstract

In laser illuminated dielectric accelerators (DLA) high acceleration gradients can be achieved, due to high damage thresholds of the materials at optical frequencies. This is a necessity in developing more compact particle accelerator technologies. The Accelerator on a CHip International Program funded by the Gordon and Betty Moore Foundation is researching such devices. Means to manipulate the beam, i.e. focusing and deflection, are needed for the proper operation of such devices. These means should rely on the same technologies for manufacturing and powering like the accelerating structures. In this study different concepts for dielectric laser driven deflecting structures are investigated via particle-in-cell (PIC) simulations and compared afterwards. The comparison is conducted with respect to the suitability for beam manipulation. Another interesting application will be investigated as a diagnostic device for ultra short electron bunches from conventional accelerators functioning like a radio frequency transverse deflecting cavity (TDS).