Probe measurements in a plasma having an anisotropic electron velocity distribution function
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In this paper a number of questions connected with the diagnostics of anisotropic electron velocity distribution functions possessing a drift velocity were examined. In an example involving a model distribution function, the possible errors in measurements of the electron energy distribution function (EEDF) using a cylindrical probe oriented parallel to the particle flow are estimated. It is shown that application of a standard method for treating probe volt-ampere characteristics leads to over- and underestimates relative to the true values of the measured temperatures T e + and T e − , found respectively according to the currents i+(V) and i−(V) on a flat probe, oriented along and against a specific direction. A comparison of calculated T e + +/T e − ratios is made with experimental data.
KeywordsExperimental Data Distribution Function Standard Method Probe Measurement Model Distribution
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- 1.A. M. Devyatov and M. A. Mal'kov, Izv. Vyssh. Uchebn. Zaved., Fiz., No. 4, 94 (1986).Google Scholar
- 2.Special Physics Practicum [in Russian], Moscow State University Press, Moscow (1960), p. 419.Google Scholar
- 3.A. F. Aleksandrov, L. S. Bogdankevich, and A. A. Rukhadze, Fundamentals of Plasma Electrodynamics [in Russian], Vysshaya Shkola, Moscow (1978).Google Scholar
- 4.B. N. Klyarfel'd and N. A. Neretina, Zh. Tekh. Fiz.,28, 296 (1958); N. A. Neretina and B. N. Klyarfel'd, Zh. Tekh. Fiz.,29, 15 (1959).Google Scholar
- 5.Ja. I. Likhter, V. I. Larkina, Yu. M. Mikhailov, et al., Space Res.,29, 339 (1979); K. Oyama and T. Abe, Geophys. Res. Lett.,14, No. 12, 1195 (1987).Google Scholar
- 6.A. I. Morozov and A. I. Bugrova, Zh. Tekh. Fiz.,55, 1725 (1985).Google Scholar