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Title: Fokker–Planck kinetic modeling of suprathermal α-particles in a fusion plasma

We present an ion kinetic model describing the transport of suprathermal α-particles in inertial fusion targets. The analysis of the underlying physical model enables us to develop efficient numerical methods to simulate the creation, transport and collisional relaxation of fusion reaction products (α-particles) at a kinetic level. The model assumes spherical symmetry in configuration space and axial symmetry in velocity space around the mean flow velocity. A two-energy-scale approach leads to a self-consistent modeling of the coupling between suprathermal α-particles and the thermal bulk of the imploding plasma. This method provides an accurate numerical treatment of energy deposition and transport processes involving suprathermal particles. The numerical tools presented here are then validated against known analytical results. This enables us to investigate the potential role of ion kinetic effects on the physics of ignition and thermonuclear burn in inertial confinement fusion schemes.
Authors:
 [1] ;  [1] ;  [2]
  1. CEA/DIF, 91297 Arpajon Cedex (France)
  2. University Bordeaux – CNRS – CEA, CELIA, 33405 Talence Cedex (France)
Publication Date:
OSTI Identifier:
22382149
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Computational Physics; Journal Volume: 278; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AXIAL SYMMETRY; ENERGY ABSORPTION; ENERGY LOSSES; HEAVY ION FUSION REACTIONS; ICF DEVICES; INERTIAL CONFINEMENT; INERTIAL FUSION DRIVERS; PARTICLES; PLASMA; POTENTIALS; SIMULATION; SPHERICAL CONFIGURATION; THERMONUCLEAR REACTIONS; VELOCITY