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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 28, Iss. 9 — May. 1, 1989
  • pp: 1680–1684

Dual far infrared laser diagnostic of magnetized plasmas

Douglass S. Darrow and Hyeon K. Park  »View Author Affiliations


Applied Optics, Vol. 28, Issue 9, pp. 1680-1684 (1989)
http://dx.doi.org/10.1364/AO.28.001680


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Abstract

A dual far infrared laser has been constructed and its properties have been exploited to probe tokamaklike discharges in the CDX toroidal device. Thermal variation of the difference frequency between the two far infrared cavities is slow, although the cavities lack thermal stabilization, simply because their assembly on the same chassis exposes them to virtually identical temperature changes. The optical arrangement beyond the laser permits conversion within minutes between interferometry and density fluctuation observation, and within an hour between different operating wavelengths. Line average densities of 2 × 1013 cm−3 and coherent fluctuations in the neighborhood of 20 kHz have been measured with this diagnostic.

© 1989 Optical Society of America

History
Original Manuscript: June 15, 1988
Published: May 1, 1989

Citation
Douglass S. Darrow and Hyeon K. Park, "Dual far infrared laser diagnostic of magnetized plasmas," Appl. Opt. 28, 1680-1684 (1989)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-28-9-1680

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