Uniformity of spherical shock wave dynamically stabilized by two successive laser profiles in direct-drive inertial confinement fusion implosions

Journal Article · Thu Oct 15 04:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4934712· OSTI ID:22486446

Canaud, B. ^[1]; Garbett, W. J. ^[2]; Ramis, R. ^[3]

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1. CEA, DIF, F-91297 Arpajon Cedex (France)
2. AWE plc, Aldermaston, Reading, Berkshire RG7 4PR (United Kingdom)
3. ETSI Aeronáutica y del Espacio, Universidad Politécnica de Madrid, 28040 Madrid (Spain)

The implosion uniformity of a directly driven spherical inertial confinement fusion capsule is considered within the context of the Laser Mégajoule configuration. Two-dimensional (2D) hydrodynamic simulations have been performed assuming irradiation with two laser beam cones located at 49° and 131° with respect to the axis of symmetry. The laser energy deposition causes an inward shock wave whose surface is tracked in time, providing the time evolution of its non-uniformity. The illumination model has been used to optimize the laser intensity profiles used as input in the 2D hydro-calculations. It is found that a single stationary laser profile does not maintain a uniform shock front over time. To overcome this drawback, it is proposed to use two laser profiles acting successively in time, in order to dynamically stabilize the non-uniformity of the shock front.

• OSTI ID: 22486446
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 10 Vol. 22; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
COMPUTERIZED SIMULATION
CONES
ENERGY ABSORPTION
HYDRODYNAMICS
ILLUMINANCE
IMPLOSIONS
INERTIAL CONFINEMENT
LASER RADIATION
LASERS
PHOTON BEAMS
SHOCK WAVES
SPHERICAL CONFIGURATION
TWO-DIMENSIONAL CALCULATIONS