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

Area of Science:

• Materials Science
• Applied Physics
• Electromagnetism

Background:

• Electromagnetic (EM) field control is crucial for protecting sensitive equipment in particle accelerators and other facilities.
• Conventional materials like conductive foils and wires offer EM protection but have limitations.
• Undesirable phenomena, such as EM wakefields, require effective suppression methods.

Purpose of the Study:

• To introduce novel composite materials with frequency-selective conductivity for enhanced EM field control.
• To compare the EM properties of dual-layer aluminium/graphene metamaterials with conventional aluminium and graphene foils.
• To investigate the conditions for full and partial electromagnetic transparency in these engineered materials.

Main Methods:

• Theoretical and experimental investigations were conducted.
• The conductivity of composite (dual-layer) aluminium/graphene metamaterials was studied.
• The EM properties of the designed metamaterials were compared against graphene and aluminium foils.

Main Results:

• The novel composite materials demonstrate unique frequency-selective conductivity.
• Comparisons revealed superior EM protection capabilities compared to conventional materials.
• Conditions for achieving full and partial electromagnetic transparency were identified.

Conclusions:

• Engineered materials can effectively control EM fields and suppress instabilities in high-intensity particle accelerators.
• These advanced materials enable precise control over EM field generating media, including relativistic charged particle beams.
• The developed composite metamaterials represent a significant advancement in EM shielding and control technologies.