Investigation of the longitudinal component of an electron electromagnetic field under condition of the shadowing effect

TL;DR

This study experimentally investigates the longitudinal component of a relativistic electron's electromagnetic field in shadowed regions, revealing no shadowing effect within the formation length, which impacts understanding of certain radiation phenomena.

Contribution

It provides the first experimental evidence that the longitudinal component does not exhibit shadowing effects in the formation length region.

Findings

No shadowing effect observed for the longitudinal component within formation length

Experimental method for analyzing electromagnetic field components

Implications for Smith-Purcell radiation understanding

Abstract

In this paper we present the method and experimental results of the investigation of a longitudinal component of relativistic electron electromagnetic field in the shadow area of a transversal component. We show experimentally, that in a region, comparable with the formation length area no shadowing effect of the longitudinal component of relativistic electron electromagnetic field appears. This is important for understanding of possibility of the shadowing effect in Smith-Purcell radiation and some other radiation types.