In Situ Dynamic Four-Dimensional Strong Field Ionization Tomography

TL;DR

This paper introduces a novel in situ 4D tomography method for dynamic strong field ionization, enabling high-resolution measurements of rapidly evolving systems like pulsed gas jets with femtosecond laser technology.

Contribution

It presents a new in situ 4D ionization tomography technique that leverages strong-field interactions for enhanced spatial resolution in dynamic systems.

Findings

Achieves high spatial resolution in measuring far-from-equilibrium systems.

Utilizes femtosecond lasers for temporal resolution limited to tens of picoseconds.

Effective for studying supersonic and hypersonic pulsed gas jets.

Abstract

We present an approach for in situ dynamic four-dimensional (4D=3D space + 1D time) laser induced strong field ionization tomography, particularly suited for measuring far-from-equilibrium systems, such as supersonic and hypersonic pulsed gas jets. The inherent physical nature of strong-field interaction leads to significantly enhanced spatial resolution, with unique intensity-resolution coupling and localization of measurement depth. By employing femtosecond laser, temporal resolution is primarily limited by electronic jitter, typically to a few tens of picoseconds.