OSA's Digital Library

Applied Optics

Applied Optics


  • Vol. 16, Iss. 7 — Jul. 1, 1977
  • pp: 1975–1981

Optics InfoBase > Applied Optics > Volume 16 > Issue 7 > Numerical study of a CO2 laser beam focused on a theta-pinch plasma in the axial direction

Numerical study of a CO2 laser beam focused on a theta-pinch plasma in the axial direction

Gilles Saint-Hilaire  »View Author Affiliations

Applied Optics, Vol. 16, Issue 7, pp. 1975-1981 (1977)

View Full Text Article

Enhanced HTML    Acrobat PDF (1078 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



Using two different empirical density profiles for the end region of a theta-pinch plasma, one with a maximum density on the axis (radiation-dispersing profile) the other with a pronounced axial minimum (radiation-trapping profile), the trajectory of the CO2 laser beam (10.6 μm) focused axially on such a plasma was studied numerically. This calculation is used to evaluate the optical influence of the plasma, since the maximum power density in the focal plane can be reduced by several orders of magnitude owing to the presence of the plasma. This influence can be substantial even for very subcritical electron densities (ne ≪ 1019 cm−3). In cases of large dispersion, the characteristics of a multifocal lens capable of producing perfect focusing are found, and it is shown that the solution is not unique. The radial distribution of the laser beam power density is also calculated and shows numerous irregularities and discontinuities due to the nonuniform beam dispersion.

© 1977 Optical Society of America

Original Manuscript: December 30, 1976
Published: July 1, 1977

Gilles Saint-Hilaire, "Numerical study of a CO2 laser beam focused on a theta-pinch plasma in the axial direction," Appl. Opt. 16, 1975-1981 (1977)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. V. L. Ginzburg, The Propagation of Electromagnetic Waves in Plasmas (Permagon, Oxford, 1964).
  2. J. M. Kelso, Radio Ray Propagation in the Ionosphere (McGraw-Hill, New York, 1964).
  3. T. H. Stix, Theory of Plasma Waves (McGraw-Hill, New York, 1962).
  4. P. D. Rockett, in IEEE 2nd International Conference Plasma Science, Ann Arbor, Mich. (1975).
  5. L. C. Steinhauer, H. G. Ahlstrom, Phys. Fluids 14, 1109 (1971). [CrossRef]
  6. R. Decoste, A. G. Engelhart, V. Fuchs, C. R. Neufeld, J. Appl. Phys. 45, 1127 (1974). [CrossRef]
  7. A. L. Hoffman, Appl. Phys. Lett. 23, 693 (1973). [CrossRef]
  8. G. M. Molen, J. Kristiansen, M. O. Hagler, R. D. Bengtson, Appl. Phys. Lett. 24, 583 (1974). [CrossRef]
  9. R. A. Hess, H. R. Griem, Phys. Fluids 18, 1056 (1975). [CrossRef]
  10. D. V. Giovanielli, R. P. Godwin, Am. J. Phys. 43, 808 (1975). [CrossRef]
  11. S. A. Mani, J. E. Eninger, J. Wallace, Nucl. Fusion 15, 371 (1975). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited