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Title: Effects of alpha stopping power modelling on the ignition threshold in a directly-driven inertial confinement fusion capsule

The alpha-particle energy deposition mechanism modifies the ignition conditions of the thermonuclear Deuterium-Tritium fusion reactions, and constitutes a key issue in achieving high gain in Inertial Confinement Fusion implosions. One-dimensional hydrodynamic calculations have been performed with the code Multi-IFE to simulate the implosion of a capsule directly irradiated by a laser beam. The diffusion approximation for the alpha energy deposition has been used to optimize three laser profiles corresponding to different implosion velocities. A Monte-Carlo package has been included in Multi-IFE to calculate the alpha energy transport, and in this case the energy deposition uses both the LP and the BPS stopping power models. Homothetic transformations that maintain a constant implosion velocity have been used to map out the transition region between marginally-igniting and high-gain configurations. Furthermore, the results provided by the two models have been compared and it is found that – close to the ignition threshold – in order to produce the same fusion energy, the calculations performed with the BPS model require about 10% more invested energy with respect to the LP model.
 [1] ;  [2] ;  [2] ;  [3] ;  [4]
  1. ENS Cachan and CNRS, Cachan Cedex (France)
  2. CEA, Arpajon Cedex (France)
  3. Univ. Politecnica de Madrid, Madrid (Spain)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 1434-6060
Grant/Contract Number:
Accepted Manuscript
Journal Name:
European Physical Journal. D, Atomic, Molecular and Optical Physics
Additional Journal Information:
Journal Volume: 71; Journal Issue: 5; Journal ID: ISSN 1434-6060
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
Country of Publication:
United States
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; direct drive ICF; alpha stopping power; ignition threshold; plasma physics
OSTI Identifier: