Measurements of direct drive laser imprint in thin foils by radiography using an x-ray laser backlighter
- Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
- Central Laser Facility, Rutherford Appleton Laboratory, Chilton, Didcot (United Kingdom)
- Clarendon Laboratory, University of Oxford, Oxford (United Kingdom)
- Department of Physics, University of Essex, Colchester (United Kingdom)
- Department of Pure and Applied Physics, Queens University of Belfast, Belfast (United Kingdom)
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14627 (United States)
In direct drive inertial confinement fusion, the residual speckle pattern remaining after beam smoothing plays an important role in the seeding of instabilities at the ablation front. An x-ray laser is used as an extreme ultraviolet backlighter to characterize the imprinted modulation in thin foils for smoothing by random phase plate and by spectral dispersion for both 0.35 and 0.53 {mu}m irradiation, and by induced spatial incoherence for 0.53 {mu}m irradiation. Measurements of the imprinted modulation due to a single optical mode generated by two beam interference, and modification of the imprint with a superposed smooth irradiation to study time dependence of the imprinting process are demonstrated. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- Lawrence Livermore National Laboratory
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 560662
- Report Number(s):
- CONF-961102--
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 4; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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