Direct measurement of the inertial confinement time in a magnetically driven implosion

Autor:	Edmund Yu, Patrick Knapp, Ian C. Smith, Thomas R. Mattsson, D. Romero, G. Loisel, Matthew Martin, M. R. Weis, Daniel Sinars, Daniel H. Dolan, Christopher Jennings, Kyle Peterson, Jens Schwarz, Kyle Robert Cochrane, Ryan D. McBride, D. G. Dalton, J.-P. Davis
Rok vydání:	2017
Předmět:	Physics business.industry Bubble Implosion Mechanics Condensed Matter Physics 01 natural sciences Instability 010305 fluids & plasmas Shock (mechanics) Optics 0103 physical sciences Plasma diagnostics Area density 010306 general physics business Magneto Inertial confinement fusion
Zdroj:	Physics of Plasmas. 24:042708
ISSN:	1089-7674 1070-664X
DOI:	10.1063/1.4981206
Popis:	We report on direct, radiographic measurement of the stagnation phase of a magnetically driven liner implosion. The liner is filled with liquid deuterium and imploded to a minimum radius of 440 μm (radial convergence ratio of 7.7) over 300 ns, achieving a density of ≈10 g/cm3. The measured confinement time is ≈14 ns, compared to 16 ns from 1D simulations. A comparison of measured density profiles with 1D and 2D simulations shows a deviation in the reflected shock trajectory and the liner areal density. Additionally, the magneto Rayleigh-Taylor instability causes enhanced compression with shorter confinement in the bubble region compared to the spikes. These effects combine to reduce the pressure-confinement time product, Pτ, by 25% compared to the simulations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5f0432cc94b93bb9623e85888d60cff1 https://doi.org/10.1063/1.4981206 Zobrazit plný text záznamu