LLE review, Volume 77. Quarterly report, October--December 1998

Technical Report · Thu Dec 31 00:00:00 EST 1998

DOI:https://doi.org/10.2172/335214· OSTI ID:335214

Regan, S P ^[1]

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1. ed.

This volume of the LLE Review, covering the period October--December 1998, includes two articles addressing issues applicable to direct-drive ICF on the National Ignition Facility (NIF): laser-plasma interactions and laser-irradiation uniformity. Additional highlights of the research presented in this issue are: (1) P.B. Radha and S. Skupsky present a novel charged-particle diagnostic that performs simultaneous {rho}R measurements of the fuel, shell, and ablator regions of a compressed ICF target, consisting of an inner DT fuel region, a plastic (CH) shell, and an ablator (CD), by measuring the knock-on deuteron spectrum. (2) F. Dahmani, S. Burns, J. Lambropoulos, S. Papernov, and A. Schmid report results from stress-inhibited laser-driven crack propagation and stress-delayed damage-initiation experiments in fused silica at 351 nm. Research is underway presently to determine the ramifications of these findings for large-aperture systems, such as OMEGA. (3) V. Goncharov presents an analytic theory of the ablative Richtmyer-Meshkov instability, which shows that the main stabilizing mechanism of the ablation-front perturbations is the dynamic overpressure of the blowoff plasma with respect to the target material. The perturbation evolution during the shock transit time is studied to determine the initial conditions for the Rayleigh-Taylor phase of the instability and to analyze the level of laser imprint on ICF direct-drive targets. (4) J.M. Larkin, W.R. Donaldson, T.H. Foster, and R.S. Knox examine the triplet state of rose bengal, a dye used in photodynamic therapy, that is produced by 1,064-nm excitation of T{sub 1}. (5) R. Adam, M. Currie, R. Sobolewski, O. Harnack, and M. Darula report measurements of the picosecond photoresponse of a current-biased YBCO microbridge coupled to a bicrystal YBCO Josephson junction.

• Research Organization: Univ. of Rochester, Lab. for Laser Energetics, NY (US)
• Sponsoring Organization: USDOE, Washington, DC (US)
• DOE Contract Number: FC03-92SF19460
• OSTI ID: 335214
• Report Number(s): DOE/SF/19460-284; ON: DE99002358; TRN: US200223%%365
• Resource Relation: Other Information: Supercedes report DE99002358; PBD: [1998]; PBD: 31 Dec 1998
• Country of Publication: United States
• Language: English

Related Subjects

60 APPLIED LIFE SCIENCES
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BICRYSTALS
CRACK PROPAGATION
DEUTERONS
EXCITATION
INSTABILITY
JOSEPHSON JUNCTIONS
KNOCK-ON
PLASTICS
ROSE BENGAL
SILICA
TARGETS
TRIPLETS
US NATIONAL IGNITION FACILITY