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Acta Phys. Sin. (Overseas Edition), 1993, Vol. 2(7): 516-522    DOI: 10.1088/1004-423X/2/7/005
PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES Prev   Next  

NEUTRAL HYDROGEN DENSITY MEASUREMENT IN TMSPP

YAO XIN-ZIa, T.F.YANGb, F.R.CHANG-DIAZb
a Institute of Physics, Academia Sinica, Beijing 100080, China; b Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, MA02139, U.S.A.
Abstract  Resonance fluorescence of neutral hydrogen illuminated by Hα (656.3 nm) radiation provides a technique for spatially and temporally resolved density measurements of neutral hydrogen in high temperature plasma. Experiments have been performed in the exhaust of a tandem mirror space propulsion device. The laser fluorescence signal from plasma has been separated successfully by eliminating the Hα radiation from plasma and laser stray light using differential method of two optical paths. The resolution of signal is greatly enhanced. The radial distribution of hydrogen decreases from edge toward the center.
Received:  10 September 1992      Published:  20 July 1993
PACS:  52.25.Os (Emission, absorption, and scattering of electromagnetic radiation ?)  
  52.70.Kz (Optical (ultraviolet, visible, infrared) measurements)  
  52.55.Rk (Power exhaust; divertors)  
  52.75.Di (Ion and plasma propulsion)  
  52.55.Hc (Stellarators, torsatrons, heliacs, bumpy tori, and other toroidal confinement devices)  

Cite this article: 

YAO XIN-ZI, T.F.YANG, F.R.CHANG-DIAZ NEUTRAL HYDROGEN DENSITY MEASUREMENT IN TMSPP 1993 Acta Phys. Sin. (Overseas Edition) 2 516

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