Mimicking Electromagnetic Wave Coupling in Tokamak Plasma with Fishnet Metamaterials

Area of Science:

• Metamaterials
• Plasma Physics
• Nuclear Fusion

Background:

• Magnetically confined plasma exhibits unique anisotropic electromagnetic properties.
• Conventional bulk materials cannot replicate these complex plasma characteristics.
• Mimicking plasma is crucial for developing advanced fusion energy systems.

Purpose of the Study:

• To design and demonstrate a metamaterial that accurately mimics magnetically confined plasma.
• To overcome limitations in simulating plasma for fusion applications.

Main Methods:

• Fabrication of a fishnet hyperbolic metamaterial using stacked copper grids and Rohacell foam.
• Numerical simulations to model the metamaterial's electromagnetic response.
• Experimental validation of the metamaterial's plasma-mimicking capabilities.

Main Results:

• The fishnet metamaterial successfully replicates the anisotropic electromagnetic properties of homogeneous plasma.
• The structured material effectively mimics plasma behavior, overcoming previous material limitations.
• The proposed structure provides a viable alternative to bulk materials for plasma simulation.

Conclusions:

• The developed fishnet hyperbolic metamaterial offers a novel solution for mimicking plasma properties.
• This advancement is expected to accelerate the development of high-frequency heating systems for nuclear fusion.
• The study breaks a long-standing bottleneck in plasma simulation for fusion energy research.