Time-resolving intra-atomic two-electron collision dynamics

TL;DR

This paper introduces a method to time-resolve two-electron collision dynamics during atomic processes using a generalized attosecond streaking technique, enabling precise identification of collision timing.

Contribution

It extends the one-electron streaking camera to measure correlated two-electron escape dynamics during atomic collisions, providing a new tool for ultrafast atomic physics.

Findings

Successfully identifies the collision time via maximum inter-electronic angle splitting.

Demonstrates the method's capability to resolve two-electron collision dynamics.

Provides a framework for future experimental investigations of correlated electron processes.

Abstract

We generalize the one electron attosecond streaking camera to time-resolve the correlated two-electron escape dynamics during a collision process involving a deep core electron. The collision process is triggered by an XUV attosecond pulse and probed by a weak infrared field. The principle of our two-electron streak camera is that by placing the maximum of the vector potential of the probing field at the time of collision we get the maximum splitting of the inter-electronic angle of escape. We thus identify the time of collision.