skip to main content

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

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.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Centre de Mathématiques et de Leurs Applications, ENS Cachan and CNRS, 61 Av. du President Wilson, F-94235 Cachan Cedex (France)
  2. CEA, DIF, F-91297 Arpajon Cedex (France)
  3. AWE plc, Aldermaston, Reading, Berkshire RG7 4PR (United Kingdom)
  4. ETSI Aeronáutica y del Espacio, Universidad Politécnica de Madrid, 28040 Madrid (Spain)
Publication Date:
OSTI Identifier:
22486446
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 10; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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