Tool kit for antennae and thermal noise near the plasma frequency

来自 EBSCO

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摘要：

This paper provides the essential tools for deriving quickly the quasi-thermal noise spectrum or the impedance of a given electric antenna near the plasma frequency, for calibration or diagnosis in space plasmas. We give simple analytical expressions and numerical results for either wire or sphere dipoles in an isotropic plasma with one or two Maxwellian electron populations. We include the contribution of the particles collected and/or emitted by the antenna surface. We also indicate some modifications brought about by using more complicated antenna geometries, and a drifting or a magnetized plasma. Finally, we give some conclusions for antenna design or data interpretation in plasma wave experiments.

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Theoretical or Mathematical/ astronomical instruments astrophysical plasma atmospheric measuring apparatus ionosphere ionospheric measuring apparatus magnetosphere plasma plasma probes random noise solar wind/ thermal noise quasi-thermal noise spectrum impedance electric antenna plasma frequency calibration space plasmas sphere dipoles Maxwellian electron populations geometries magnetized plasma design/ A5270D Electric and magnetic plasma diagnostic techniques, probes A9480 Instrumentation and techniques for aeronomy, space physics, and cosmic rays A9555L Aerospace instrumentation A9430 Magnetosphere A9460G Solar wind plasma A9420 Ionosphere