The Plasma Angular Frequency ωp

The total current density in a ionized gas is
J_^t = ∂D/∂t + Jf = jωε₀ E – j Ne Q²_e /ωm_e E.
           
J_t = jωε₀ E(1 – N_e Q²_e /ω2ε₀ m_e)                        ... (1)

            Jt = jωε₀ E (1 – ω²p / ω² ),                            ... (2)

Here,        ωp = (N_eQ²_e /ε₀m_e)                                ... (3)

    ωp is called the plasma angular frequency.


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