Quasi-thermal Noise Spectra Measured by a Dipole Antenna in the Upper Hybrid frequency band |
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| Authors: | Yury V Chugunov Anna Yu Kazarova Eugene A Mareev Michel Moncuquet Karine Issautier Nicole Meyer-Vernet |
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| Institution: | (1) Institute of Applied Physics RAS, Nizhny Novgorod, Russia;(2) DESPA, Observatoire de Paris, Meudon, France |
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| Abstract: | Quasi-thermal noise (QTN) spectroscopy is one of the most effective tools for in situ diagnostics in space plasmas (Meyer-Vernet et al., 1998; Meyer-Vernet and Perche, 1989; Chugunov and Trakhtengerts, 1978). This method produces routine measurements of the
bulk electron density and temperature; recently it has been extended to measure the ion bulk speed. Among the advantages of
the method its immunity to spacecraft potential and photoelectron perturbations should be noted. Quasi-thermal noise spectroscopy
is used particularly on Ulysses and Wind. However for the interpretation of QTN data the calculation of the noise voltage
induced on antennas under different conditions is necessary. This question is especially complicated and so far insufficiently
studied in magnetized plasmas. In the present paper we calculate the spectrum of the noise voltage induced on a dipole antenna
in the upper hybrid frequency range. The computations are adapted to the interpretation of data acquired on the Ulysses and
Wind spacecraft.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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