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Hot ion plasma heating experiments in SUMMAInitial results are presented for the hot-ion plasma heating experiments conducted in the new SUMMA (superconducting magnetic mirror apparatus) at NASA Lewis Research Center. A discharge is formed by applying a radially inward dc electric field between cylindrical anodes and hallow cathodes located at the peak of the mirrors. Data were obtained at midplane magnetic field strengths from 1.0 to 3.5 tesla. Charge-exchange neutral particle energy analyzer data were reduced to ion temperatures using a plasma model that included a Maxwellian energy distribution superimposed on an azimuthal drift, finite ion orbits, and radial variations in density and electric field. The best ion temperatures in a helium plasma were 5 keV and in hydrogen the H2(+) and H(+) ions were 1.2 keV and 1 keV respectively. Optical spectroscopy line broadening measurements yielded ion temperatures about 50 percent higher than the charge-exchange neutral particle analyzer results. Spectroscopically obtained electron temperature ranged from 3 to 30 eV. Ion temperature was found to scale roughly linearly with the ratio of power input-to-magnetic field strength, P/B.
Document ID
19740019119
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Reinmann, J. J. (NASA Lewis Research Center Cleveland, OH, United States)
Lauver, M. R. (NASA Lewis Research Center Cleveland, OH, United States)
Patch, R. W. (NASA Lewis Research Center Cleveland, OH, United States)
Posta, S. J. (NASA Lewis Research Center Cleveland, OH, United States)
Snyder, A. (NASA Lewis Research Center Cleveland, OH, United States)
Englert, G. W. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1974
Subject Category
Physics, Plasma
Report/Patent Number
E-7984
NASA-TM-X-71559
Meeting Information
Meeting: Intern. Conf. on Plasma Sci.
Location: Knoxville, TN
Country: United States
Start Date: May 15, 1974
End Date: May 17, 1974
Sponsors: IEEE
Accession Number
74N27232
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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