Plasma Oscillations (Langmuir Waves)
1D jellium model — electrons displaced from positive background, Langmuir frequency ωₚ
ωₚ = √(ne²/ε₀mₑ) | Electrons oscillate at plasma frequency regardless of wavelength (electrostatic mode)
Electron density ρ(x) — blue = depleted, orange = compressed
Electric field E(x)
Phase space (x, v)
Plasma density n₀:
1.00
Damping ν:
0.02
Displacement A:
0.30
Wave mode k:
1
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