Accession Number:

ADA235798

Title:

Reduction of Three-Halves Harmonic Emission from Laser-Produced Plasmas with Broadwidth Induced Spatial Incoherence at 0.53 micrometers

Descriptive Note:

Memorandum rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

• Peyser, T. A.
• Manka, C. K.
• Obenschain, S. P.
• Kearney, K. J.

Report Date:

1991-05-24

Pagination or Media Count:

27.0

Abstract:

Measurements of the omega sub 02 emission from Laser irradiated targets at 0.53 microns were made at three angles over a wide range of Laser bandwidths with and without induced spatial incoherence ISI echelons. THe 3 microns2 emission was found to be correlated with hard x rays but not Raman spectra suggesting that the 3 omega sub 02 radiation was due to two plasmon decay. Reduction of both 3 omega sub 02 emission and the accompanying hard x rays by ISI required five to ten times Larger bandwidths than needed to suppress stimulated Raman scattering and stimulated Brilloin scattering.

Descriptors:

• *LASER TARGET DESIGNATORS
• HARD X RAYS
• LIGHT SCATTERING
• SCATTERING
• STIMULATION(GENERAL)
• PLASMAS(PHYSICS)
• LASERS
• X RAYS
• INCOHERENCE
• IRRADIATION
• RANGE(EXTREMES)
• BANDWIDTH
• PLASMONS
• DECAY
• RAMAN SPECTRA
• ANGLES
• SPATIAL DISTRIBUTION

Subject Categories:

• Lasers and Masers
• Directed Energy Weapons
• Plasma Physics and Magnetohydrodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE