Accession Number:

ADP007092

Title:

Efficient Coupling of High-Intensity Subpicosecond Laser Pulses into Dilute Solid Targets,

Descriptive Note:

Corporate Author:

WASHINGTON STATE UNIV PULLMAN DEPT OF PHYSICS

Personal Author(s):

• Murnane, M.
• Kapteyn, H.
• Gordon, S.
• Verghese, S.
• Bokor, J.

Report Date:

1992-05-22

Pagination or Media Count:

4.0

Abstract:

We have demonstrated that high-intensity sub-picosecond laser pulses can be efficiently absorbed by a dilute solid material. We have measured laser reflectivities as low as 10 from certain targets, in contrast to the 90 reflectivity observed from flat solid surfaces. The hot plasmas generated on dilute solids exhibit greatly increased x-ray emission due to the enhanced laser absorption. Laser-to-x-ray conversion efficiency greater than 1 have been observed for x-ray energies above 1keV.

Descriptors:

• *PULSED LASERS
• *COHERENT OPTICAL RADIATION
• *REFLECTIVITY
• *X RAYS
• METALS
• PLASMAS(PHYSICS)
• SHORT WAVELENGTHS
• COHERENT RADIATION
• SOLIDS
• GRATINGS(SPECTRA)
• SYMPOSIA

Subject Categories:

• Lasers and Masers
• Optics
• Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE