中国物理B ›› 1993, Vol. 2 ›› Issue (7): 516-522.doi: 10.1088/1004-423X/2/7/005

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NEUTRAL HYDROGEN DENSITY MEASUREMENT IN TMSPP

姚鑫兹1, T.F.YANG2, F.R.CHANG-DIAZ2   

  1. (1)Institute of Physics, Academia Sinica, Beijing 100080, China; (2)Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, MA02139, U.S.A.
  • 收稿日期:1992-09-10 出版日期:1993-07-20 发布日期:1993-07-20

NEUTRAL HYDROGEN DENSITY MEASUREMENT IN TMSPP

YAO XIN-ZI (姚鑫兹)a, T.F.YANGb, F.R.CHANG-DIAZb   

  1. a Institute of Physics, Academia Sinica, Beijing 100080, China; b Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, MA02139, U.S.A.
  • Received:1992-09-10 Online:1993-07-20 Published:1993-07-20

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摘要： 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.

Abstract: Resonance fluorescence of neutral hydrogen illuminated by H$\alpha$ (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 H$\alpha$ 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.

中图分类号:  (Emission, absorption, and scattering of electromagnetic radiation ?)

  • 52.25.Os
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)