The fuel in a fusion reactor is plasma—the fourth state of matter, where electrons are stripped from atoms. The plasma energy market includes the technologies to create, confine, heat, and diagnose plasma. This includes magnets (to confine), heating systems (neutral beam injectors, radio-frequency wave systems), and diagnostics (lasers, spectrometers). As fusion research scales up, the plasma energy market is growing, with applications also in semiconductor manufacturing and space propulsion.

The broader fusion energy market relies on this technology. The plasma energy market for "magnetic confinement" is the largest. The plasma energy market for "tokamak" and "stellarator" confinement is the focus. The plasma energy market for "superconducting" magnets (as discussed) is essential for steady-state plasma. The plasma energy market for "magnet power supplies" (delivering high current with precise control) is also important.

The plasma energy market for "plasma heating" includes "neutral beam injection" (NBI) (accelerating neutral atoms into the plasma) and "ion cyclotron resonance heating" (ICRH) (radio waves). The plasma energy market for "electron cyclotron resonance heating" (ECRH) and "lower hybrid" heating are also used. The plasma energy market for "heating" systems are high-power (10-50 MW) and require specialized sources.

The plasma energy market for "plasma diagnostics" measures parameters like temperature, density, and magnetic field. The plasma energy market for "Thomson scattering" (using a laser) measures electron temperature and density. The plasma energy market for "interferometry" (using laser or microwave) measures electron density. The plasma energy market for "magnetic probes" and "spectroscopy" are also used.

The plasma energy market for "plasma-facing components" (PFCs) must withstand high heat and particle flux. The plasma energy market for "tungsten" and "beryllium" armor is used. The plasma energy market for "liquid" metal walls (e.g., lithium) is being researched. The plasma energy market for "divertor" technology is critical for impurity control.

Looking ahead, the plasma energy market will see the adoption of "AI" for plasma control. The plasma energy market for "real-time" plasma feedback systems will improve stability. The plasma energy market for "advanced" plasma scenarios (e.g., high-confinement mode, H-mode) will be studied. As fusion moves toward commercial power, the plasma energy market will provide the "brains" of the reactor.

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