What question did this study set out to answer?

The aim is to develop a diagnostic technique for measuring the size of high-charge electron beams without interrupting their flow.

March 5, 2026Open Access

A New Non-Intercepting Beam Size Diagnostics Using Diffraction Radiation from a Slit

Key Points

The aim is to develop a diagnostic technique for measuring the size of high-charge electron beams without interrupting their flow.
Developed a non-intercepting beam diagnostics approach
Analyzed angular distribution of transition radiation
Used a slit cut in metallic foil for effective measurements
Performed numerical simulations based on TTF FEL beam parameters
Achieved better resolution than the conventional transverse formation zone
Demonstrated the effectiveness of diffraction radiation for beam sizing

Abstract

A new non intercepting beam size diagnostics for high charge electron beams is presented. This diagnostics is based on the analysis of the angular distribution of the 'diffracted' transition radiation emitted by the beam when crossing a slit cut in metallic foil. It allows a resolution better then the radiation transverse formation zone. Numerical results based on the parameters of the TTF FEL beam are given as examples.

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