NDLI: Lower hybrid emission diagnostics on the nasa lewis bumpy torus

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Lower hybrid emission diagnostics on the nasa lewis bumpy torus

Content Provider	NASA Technical Reports Server (NTRS)
Author	Mallavarpu, R.
Copyright Year	1977
Description	The feasibility of using RF emission near the lower hybrid frequency of the NASA Lewis Bumpy Torus plasma for diagnostic purposes is examined. The emission is detected using a spectrum analyzer and a 50 omega miniature coaxial antenna that is sensitive to the polarization of the incoming signal. The frequency shift of the lower hybrid emission peak is monitored as a function of the background pressure, electrode voltage, electrode ring configuration and the strength of the toroidal dc magnetic field. Simultaneous measurements of the average plasma density are made with a polarization diplexing microwave interferometer. Data derived from the experiment are discussed with reference to the following: (1) the strength of the dc magnetic field in the emitting region; (2) comparison of the lower hybrid plasma density with the average plasma density; and (3) validity of the cold plasma lower hybrid resonance formula in the high density operating regime of the bumpy torus plasma.
File Size	969037
Page Count	15
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19780011995
Archival Resource Key	ark:/13960/t8z941k5r
Language	English
Publisher Date	1977-01-01
Access Restriction	Open
Subject Keyword	Plasma Physics Plasma Diagnostics Electron Density Concentration Emission Spectra Plasma Resonance Radio Frequency Discharge Plasma Frequencies Magnetic Fields Plasma Probes Toroidal Plasmas Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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