The slow relaxation of non-equilibrium state in metal target excited by picosecond electron beam: interferometric and simulation studies

TL;DR

This study investigates the relaxation process of non-equilibrium states in metal targets excited by picosecond electron beams, using interferometric measurements and simulations to analyze material response.

Contribution

It introduces an experimental setup for generating picosecond electron beams and combines interferometric and simulation methods to study metal target dynamics.

Findings

Measured displacement and speed of copper anode rear side over time.

Analyzed the evolution of space-time characteristics of the anode material.

Compared experimental results with simulation data.

Abstract

The experimental EXCITOR setup for obtaining the intense electron beams of picosecond duration is presented in this work. Cathodes of tungsten, graphite, copper and samarium of the same shape were used in these experiments. The interelectrode gap varied from 0.5 to 6 mm. Interferometric technique to detect anode rear side displacement was used. The time evolution of the displacement and speed of the rear side of copper anode of 0.1 and 3.0 mm thickness was experimentally obtained. Simulation of the space-time characteristics evolution of the anode material is presented.