Imprint reduction using an intensity spike in OMEGA cryogenic targets

Autor:	T. J. B. Collins, S. Skupsky
Rok vydání:	2002
Předmět:	Physics law Shell (structure) Implosion Rayleigh–Taylor instability Atomic physics Condensed Matter Physics Laser Inertial confinement fusion Omega Instability Intensity (heat transfer) law.invention
Zdroj:	Physics of Plasmas. 9:275-281
ISSN:	1089-7674 1070-664X
DOI:	10.1063/1.1425840
Popis:	A novel technique for reducing laser imprint in OMEGA [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] cryogenic targets has been developed. A typical direct-drive inertial confinement fusion target consists of a shell of deuterium–tritium ice with a thin outer layer of polystyrene (CH). The presence of the CH layer gives rise to a brief period of early-time Rayleigh–Taylor instability. This effectively increases the amount of laser imprint by about a factor of 2 for typical target configurations, and especially for the nonuniformity modes considered most dangerous for target performance. Two-dimensional hydrodynamic simulations show that by introducing a short, high-intensity spike at the start of the implosion, this early-time growth can be significantly reduced with only a modest decrease in the calculated one-dimensional neutron yield.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1dfe367cec0be0677c0e6b8da13d68b9 https://doi.org/10.1063/1.1425840 Zobrazit plný text záznamu