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--- private:writeups:plasmaimpedanceprobes [2020/07/02 14:15]
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+++ private:writeups:plasmaimpedanceprobes [2020/07/02 14:17] (current)
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 PIPs can be operated in a number of methods
-  - Actively driven RF sweeps [Blackwell2005].  Relate the peaks and zero intercepts of Re(Z) and Im(Z) to circuit models to get the plasma frequency.
+  - Actively driven RF sweeps [Blackwell2005].  Relate the peaks and zero intercepts of Re(Z) and Im(Z) to circuit models and dispersion relationships to get the plasma frequency.
-  - Plasma oscillation (excite a two stream instability) [Blackwell2005].  Drive weak beam of electrons into the plasma to excite a two stream instability.  It's frequency is close to the plasma frequency.  An FFT of passive PIP measurements reveals the frequency.
+  - Plasma oscillation (excite a two stream instability) [Blackwell2005].  Drive weak beam of electrons into the plasma to excite a two stream instability.  Under correct conditions, its frequency is close to the plasma frequency.  An FFT of passive PIP measurements reveals the frequency.

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