Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrophotometer
Patent
1986-03-06
1987-11-17
Evans, F. L.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrophotometer
250565, 250573, 356328, 356436, G01J 342
Patent
active
047071338
ABSTRACT:
A system for measuring the density of certain ions or neutrals within a plasma without probe intervention. When cylindrical symmetry is present, the system also provides measurement of spatial distribution of excited ionic states within the plasma. The system allows spatial distribution of contaminant ions in magnetic confinement thermonuclear fusion devices to be monitored. These functions are accomplished by directing two laser beams through a region containing a plasma. The laser means are at respective wavelengths chosen to be in and closely adjacent to a spectral region near the electronic transition frequency of the ionic species of interest in the plasma. The intensities of the two wavelengths are then measured and compared to obtain the desired data and characterization.
REFERENCES:
patent: 3510665 (1970-05-01), Goolsby
patent: 4426640 (1984-01-01), Beeconsall et al.
patent: 4516858 (1985-05-01), Gelbwachs
Marrodineumu et al., Applied Optics vol. 7, No. 7 pp. 1281-1285.
R. M. Measures, "Spectral Line Interferometry: A Proposed Means . . . Poption,"Applied Optics, vol. 9, No. 3, Mar. 1970, pp. 737-741.
H. Odenthal et al., "Determination of Temperature . . . Atomic Resonances," IEEE Transactions on Plasma Science, vol. PS-8, No. 4, Dec. 1980, pp. 431-436.
R. H. Huddlestone & S. L. Leonard, Editors, "Plasma Diagnostic Techniques," Academic Press, 1965 (contents).
Conrad Raymond W.
Honeycutt Thomas E.
Roberts Thomas G.
Bush Freddie M.
Evans F. L.
Garvin, Jr. John C.
Samuels Frederick N.
The United States of America as represented by the Secretary of
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