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Effect of anode ring arrangement on the spectroscopic characteristics of the NASA Lewis Bumpy Torus plasmaThe modified Penning discharge in the NASA Lewis Bumpy Torus is normally produced by an anode ring at high voltage in each of the 12 magnetic mirror midplanes. For this investigation, the plasma was run with 12, 6, 3, and 1 anode rings. When 3 anode rings were used, the spectroscopically determined relative electron density and mean ion residence time increased by factors of 10 and 5, respectively, in one mode of operation. The discharge is observed to uniformly fill all bumps around the torus regardless of the anode arrangement and number. A plasma density on axis of 100 billion per cu cm is estimated for the 3-anode case in one mode of operation based on an observed discharge current to ion loss rate correlation and a measured mean ion residence time of .5 msec.
Document ID
19750033429
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Richardson, R. W.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 8, 2013
Publication Date
October 1, 1974
Subject Category
Plasma Physics
Meeting Information
Meeting: American Physical Society, Annual Meeting
Location: Albuquerque, NM
Start Date: October 28, 1974
End Date: October 31, 1974
Sponsors: American Physical Society
Accession Number
75A17501
Distribution Limits
Public
Copyright
Other

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