Evaluation of the effect of prepulses on HF laser-target interactions

Technical Report · Fri Jun 01 00:00:00 EDT 1979

DOI:https://doi.org/10.2172/6245179· OSTI ID:6245179

Matzen, M K

We have assessed the effect of multinanosecond, low-power-density prepulses on the interaction of multinanosecond, 10/sup 14/ W/cm/sup 2/, approx. 3 -..mu..m HF laser pulses with slab targets. The emphasis is on analyzing absorption and x-ray conversion efficiency. A survey of previous experiments gives no evidence that these prepulses will affect the total absorption. However, prepulses have been observed to cause qualitative changes in both the x-ray spectrum and conversion efficiency. Numerical simulations indicate that the laser-target interaction is effectively insensitive to low-power-density prepulses. These studies imply that basic laser-target experiments with multiplexed, HF laser pulses will provide an important characterization of the interaction of long pulse, multi-line, approx. 3 ..mu..m radiation with targets. Future wavelength comparison experiments will require prepulse suppression or target isolation.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 6245179
• Report Number(s): SAND-79-0353; TRN: 79-016791
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LASER TARGETS
INTERACTIONS
ABSORPTION SPECTRA
CHEMICAL LASERS
HYDROFLUORIC ACID
LASER RADIATION
SCATTERING
X-RAY SPECTRA
ELECTROMAGNETIC RADIATION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LASERS
RADIATIONS
SPECTRA
TARGETS
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