In Situ Characterization of Ultraintense Laser Pulses

TL;DR

This paper introduces a novel in situ method using relativistic electron beams to characterize ultraintense laser pulses by analyzing emitted attosecond X-ray flashes, addressing a key challenge in high-intensity laser diagnostics.

Contribution

The paper presents a new technique for in situ measurement of ultraintense laser pulses through electron beam probing and X-ray emission analysis, enabling detailed pulse characterization.

Findings

Successful detection of attosecond X-ray pulses emitted by electrons

Ability to determine laser pulse properties in real-time

Enhanced understanding of laser-electron interactions at high intensities

Abstract

We present a method for determining the characteristics of an intense laser pulse by probing it with a relativistic electron beam. After an initial burst of very high-energy $\gamma$-radiation the electrons proceed to emit a series of attosecond duration X-ray pulses as they leave the field. These flashes provide detailed information about the interaction, allowing us to determine properties of the laser pulse: something that is currently a challenge for ultra-high intensity laser systems.