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CRITICAL CURRENT FOR BURNOUT IN AN OGRA-TYPE DEVICE

Technical Report ·
OSTI ID:4208707
A complete algebraic analysis has been obtained for the variation of the steady state ion density n/sub +/ with injected current I in an OGRA-type fusion device (i.e., a device based on trapping of ions by breakup of energetic molecular ions on collision with either the background gas or trapped ions). The most general variation of n+ with I is shown to be an s-curve with at most three roots of n/sub +/ for a given input I. A physical interpretation of these three roots is given. in addition algebraic expressions are obtained for the two currents at which the bends in the scurve occur. It will be necessary to attain the larger current in order to build up a high density plasma when the density is being increased from below. On the other hand. once the high density has been achieved it may be maintained by steady injection of a current larger than the lower value. (auth)
Research Organization:
Oak Ridge National Lab., Tenn.
NSA Number:
NSA-14-004046
OSTI ID:
4208707
Report Number(s):
TID-7582(Paper 12)
Country of Publication:
Country unknown/Code not available
Language:
English

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