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Microwave radiation measurements near the electron plasma frequency of the NASA Lewis Bumpy Torus plasmaMicrowave emission near the electron plasma frequency of the NASA Lewis Bumpy Torus plasma has been observed, and its relation to the average electron density and the dc toroidal magnetic field was examined. The emission was detected using a spectrum analyzer and a 50-ohm miniature coaxial probe. The radiation appeared as a broad amplitude peak that shifted in frequency as the plasma parameters were varied. The observed radiation scanned an average plasma density ranging from 20 billion to 800 billion per cu cm. A linear relation was observed between the density calculated from the emission frequency and the average plasma density measured with a microwave interferometer. With the aid of a relative density profile measurement of the plasma, it was determined that the emissions occurred from the outer periphery of the plasma.
Document ID
19790030940
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Mallavarpu, R.
(NASA Lewis Research Center Cleveland, OH, United States)
Roth, J. R.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
October 1, 1978
Subject Category
Plasma Physics
Accession Number
79A14953
Distribution Limits
Public
Copyright
Other

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