Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-25T22:33:55.405Z Has data issue: false hasContentIssue false
  • English
  • Français

Laser and plasma conditions at the onset of Raman scattering in an underdense plasma

Published online by Cambridge University Press:  09 March 2009

J. A. Tarvin ,
Gar E. Busch ,
E. F. Gabl ,
R. J. Schroeder  and
C. L. Shepard
J. A. Tarvin
Affiliation:
KMS Fusion, Inc., P.O. Box 1567, Ann Arbor, MI 48106, USA
Gar E. Busch
Affiliation:
KMS Fusion, Inc., P.O. Box 1567, Ann Arbor, MI 48106, USA
E. F. Gabl
Affiliation:
KMS Fusion, Inc., P.O. Box 1567, Ann Arbor, MI 48106, USA
R. J. Schroeder
Affiliation:
KMS Fusion, Inc., P.O. Box 1567, Ann Arbor, MI 48106, USA
C. L. Shepard
Affiliation:
KMS Fusion, Inc., P.O. Box 1567, Ann Arbor, MI 48106, USA
Get access Rights & Permissions [Opens in a new window]

Abstract

The laser and plasma conditions at the onset of Raman scattering have been measured in plasmas formed from thin-foil targets. The targets were Al disks 50 to 250 nm thick and 200 to 500 μm in diameter mounted on 100 nm polymer films. The incident wavelength was 526 nm. Raman scattering was observed for nominal intensities from 1014 W/cm2 to 5 × 1014 W/cm2. The most important observation of the experiment is that the density-gradient scale-length at onset is independent of intensity. One would expect the scalelength at onset to be inversely related to the intensity, since the convective gain for stimulated Raman scattering (SRS) is proportional to the product of intensity and scalelength.

Type
Research Article
Information
Laser and Particle Beams , Volume 4 , Issue 3-4 , August 1986 , pp. 461 - 471
Copyright
Copyright © Cambridge University Press 1986

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Baldis, H. A., Labaune, C, Fabre, E. & Briand, F. 1985 Fifteenth Anomalous Absorption Conference, Banff, Alberta June 24–28.Google Scholar
Busch, Gar. E., Shepard, C. L., Siebert, L. D. & Tarvin, J. A. 1985 Rev. Sci. Instrum. 56, 879.CrossRefGoogle Scholar
Labaune, C., Baldis, H., Amiranoff, F., Fabre, E. & Briand, F. 1985 Seventeenth European Conference on Laser Interaction with Matter, Rome, Italy November 18–22.Google Scholar
Liu, C. S., Rosenbluth, M. N. & White, R. B. 1974 Phys. Fluids, 17, 1211.CrossRefGoogle Scholar
Phillion, D. W., Banner, D. L., Campbell, E. M., Turner, R. E. & Estabrook, K. G. 1982 Phys. Fluids, 25, 1434.CrossRefGoogle Scholar
Shepard, C. L., Tarvin, J. A., Busch, Gar. E., Johnson, R. R., Schroeder, R. J. & Berger, R. L. 1986 Phys. Fluids, 29, 583.CrossRefGoogle Scholar
Simon, A. & Short, R. W. 1984 Phys. Rev. Lett. 53, 1912.CrossRefGoogle Scholar
Tanaka, K., Goldman, L. M., Seka, W., Richardson, M. C, Sources, J. M. & Williams, E. A. 1982 Phys. Rev. Lett. 48, 1179.CrossRefGoogle Scholar
Turner, R. E., Phillion, D. W., Campbell, E. M., & Estabrook, K. G. 1983 Phys. Fluids, 26, 579.CrossRefGoogle Scholar