Design and characterisation of frequency selective conductive materials for electromagnetic fields control

I V Konoplev,D W Posthuma De Boer,M John,C M Warsop

doi:10.1038/s41598-020-76447-x

I V Konoplev, D W Posthuma De Boer + Show 2 more

Open Access

https://doi.org/10.1038/s41598-020-76447-x

Copy DOI

Abstract

To prevent the electromagnetic (EM) wakefields excitation, protect detectors from damage at a range of installations and facilities including particle accelerators the EM field control is required. Conductive foils or wires providing EM protection and required thermal and mechanical properties are normally used. We suggest novel composite materials with uniquely designed frequency selective conductivity enabling them to overcome the properties of the conventional materials, protect from EM fields and supress undesirable phenomena. Theoretical and experimental investigations are carried out and the conductivity of designed and composite (dual-layer) aluminium/graphene metamaterials as well as graphene and aluminium foils is studied. The EM properties of these materials are compared, and conditions of full and partial electromagnetic transparency are discussed. Results observed allow engineering materials capable of EM field control, instability suppression including those observed in high-intensity particle accelerators and enabling control of an EM field generating media including relativistic charge particle beams.

Highlights

To prevent the electromagnetic (EM) wakefields excitation, protect detectors from damage at a range of installations and facilities including particle accelerators the EM field control is required
Using the results observed we suggest and demonstrate a way to design materials with a frequency selective conductivity (FSC) allowing EM radiation to be absorbed at one frequency interval while acting as a good conductor at another
We will look at the design of materials for the electromagnetic (EM) shielding of detectors located in harsh EM radiation environments

Summary

Introduction

To prevent the electromagnetic (EM) wakefields excitation, protect detectors from damage at a range of installations and facilities including particle accelerators the EM field control is required. We suggest novel composite materials with uniquely designed frequency selective conductivity enabling them to overcome the properties of the conventional materials, protect from EM fields and supress undesirable phenomena. We suggest the concept of materials with frequency selective conductivity and investigate the electromagnetic (EM) shielding properties (i.e. full, partial transparency, reflection) of conductive, single layer foils, novel composite foils (two or more layers) and engineered materials for a range of applications including shielding of VELO (Vertex Locater) detector at CERN and prevention of beam instabilities in high intensity charged particle beam accelerators. The result presented in this work will benefit many areas including radar, communications, accelerators and high energy physics

Methods

Results

Conclusion