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Plasma Physics

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Plasma Physics

Plasma Antenna

A radiofrequency antenna that uses ionized plasma gas instead of solid metal conductors to transmit and receive electromagnetic signals.

Conductivity σ_p = (n_e e²) / (m_e (ν_coll - i ω)) MHz / GHz (RF Operating Frequency)
Plasma Physics

Plasma Astrophysics

The branch of astrophysics applying plasma physics and magnetohydrodynamics to model cosmic phenomena throughout the universe.

B² / (2 μ₀) ~ ρ v² ~ P_thermal (Cosmic Equipartition) Cosmic Plasma Physics
Plasma Physics

Plasma Beta

The ratio of kinetic thermal plasma pressure to magnetic field pressure in a magnetized plasma.

β = p_kinetic / p_magnetic = (n k_B T) / (B² / (2 μ₀)) Dimensionless Ratio
Plasma Physics

Plasma Etching

A semiconductor manufacturing process using reactive gas plasmas to selectively remove surface layers from microchip wafers.

Anisotropic Reactive Ion Etching (RIE) nm/min (Etch Rate) & Aspect Ratio
Plasma Physics

Plasma Frequency

The natural characteristic frequency of collective electrostatic electron oscillations in a plasma when perturbed from thermal equilibrium.

ω_pe = √(n_e e² / (m_e ε₀)) rad/s (Angular Frequency)
Plasma Physics

Plasma Medicine

An emerging field of medical physics applying non-thermal atmospheric pressure plasmas directly to living tissues for therapeutic treatment.

RONS Generation: NO, O₂⁻, H₂O₂, OH•, ONOO⁻ Biomedical Application
Plasma Physics

Plasma Parameter

A fundamental dimensionless number in plasma physics measuring the average number of electrons contained within a Debye sphere.

Λ = n_e λ_D³ ≫ 1 Dimensionless Number of Particles in Debye Sphere
Plasma Physics

Plasma Sheath

A thin non-neutral positive boundary layer formed in a plasma adjacent to any physical wall or electrode.

V_sheath ≈ (k_B T_e / (2 e)) ln(m_i / (2 π m_e)), v_ion ≥ c_s = √(k_B T_e / m_i) V (Sheath Voltage) & m (Thickness ~ λ_D)
Plasma Physics

Plasma Torch

An electromechanical device that generates a high-temperature thermal plasma jet by passing inert or reactive gas through an electric arc…

Thermal Equilibrium T_gas ≈ T_electron ~ 5,000–15,000 K kW to MW (Electrical Power Input)
Plasma Physics

Plasma Wave Dispersion Relations

Mathematical equations relating wave frequency ω to wavevector k for electromagnetic and electrostatic waves propagating through magnetized…

CMA Diagram (Clemmow-Mullaly-Allis Wave Mode Classification) ω vs k (Dispersion Relation Curve)