Ultrafast High Energy Electron Radiography for Electromagnetic Field Diagnosis

TL;DR

This paper introduces a novel ultrafast high energy electron radiography technique for diagnosing transient electromagnetic fields, capable of precise point-by-point measurement even in scattering conditions, with verified simulation results.

Contribution

It presents a new method leveraging ultrafast high energy electron radiography for electromagnetic field diagnosis, including beamline design and simulation validation.

Findings

Feasible diagnosis of magnetic fields from 170T*μm to 600T*μm.

Ability to determine field direction by breaking beam symmetry.

Method remains effective despite matter scattering effects.

Abstract

This letter proposes a new method based on ultrafast high energy electron radiography to diagnose transient electromagnetic field. For the traditional methods, large scattering from matter will increase the uncertainty of measurement, but our method still works in that case. To verify its feasibility, a $ 50MeV $ electron radiography beamline is designed and optimized, and preliminary simulation of diagnosing a circular magnetic field ranging from $ 170T*\mu m $ to $ \sim 600T*\mu m$ has been done. The simulation results indicate that this method can achieve point-by-point measurement of field strength. By destroying the angle symmetry of incident beams, the field direction can also be determined. Combined with the advantages of electron beams, ultrafast high energy electron radiography is very suitable for transient electromagnetic field diagnosis.