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

Abstract

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.

Authors:
 [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:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1375175
Report Number(s):
LA-UR-17-20568
Journal ID: ISSN 1434-6060
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
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
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; direct drive ICF; alpha stopping power; ignition threshold; plasma physics

Citation Formats

Temporal, Mauro, Canaud, Benoit, Cayzac, Witold, Ramis, Rafael, and Singleton, Jr., Robert L. Effects of alpha stopping power modelling on the ignition threshold in a directly-driven inertial confinement fusion capsule. United States: N. p., 2017. Web. doi:10.1140/epjd/e2017-80126-6.
Temporal, Mauro, Canaud, Benoit, Cayzac, Witold, Ramis, Rafael, & Singleton, Jr., Robert L. Effects of alpha stopping power modelling on the ignition threshold in a directly-driven inertial confinement fusion capsule. United States. doi:10.1140/epjd/e2017-80126-6.
Temporal, Mauro, Canaud, Benoit, Cayzac, Witold, Ramis, Rafael, and Singleton, Jr., Robert L. Thu . "Effects of alpha stopping power modelling on the ignition threshold in a directly-driven inertial confinement fusion capsule". United States. doi:10.1140/epjd/e2017-80126-6. https://www.osti.gov/servlets/purl/1375175.
@article{osti_1375175,
title = {Effects of alpha stopping power modelling on the ignition threshold in a directly-driven inertial confinement fusion capsule},
author = {Temporal, Mauro and Canaud, Benoit and Cayzac, Witold and Ramis, Rafael and Singleton, Jr., Robert L.},
abstractNote = {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.},
doi = {10.1140/epjd/e2017-80126-6},
journal = {European Physical Journal. D, Atomic, Molecular and Optical Physics},
number = 5,
volume = 71,
place = {United States},
year = {2017},
month = {5}
}

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Works referenced in this record:

Optimization of laser–target coupling efficiency for direct drive laser fusion
journal, November 2005


A new quotidian equation of state (QEOS) for hot dense matter
journal, January 1988

  • More, R. M.; Warren, K. H.; Young, D. A.
  • Physics of Fluids, Vol. 31, Issue 10
  • DOI: 10.1063/1.866963

Improved formulas for fusion cross-sections and thermal reactivities
journal, April 1992


Low initial aspect-ratio direct-drive target designs for shock- or self-ignition in the context of the laser Megajoule
journal, June 2014


Charged particle motion in a highly ionized plasma
journal, May 2005


Ignition conditions for inertial confinement fusion targets with a nuclear spin-polarized DT fuel
journal, August 2012


The physical basis for numerical fluid simulations in laser fusion
journal, November 1987


Charged particle stopping power effects on ignition: Some results from an exact calculation
journal, May 2008


An equation of state code for hot dense matter, based on the QEOS description
journal, October 1998

  • Kemp, A. J.; Meyer-ter-Vehn, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 415, Issue 3
  • DOI: 10.1016/S0168-9002(98)00446-X

ADiffusive model for α-particle energy transport in a laser plasma
journal, August 1981


MULTI-IFE—A one-dimensional computer code for Inertial Fusion Energy (IFE) target simulations
journal, June 2016


Charged-particle stopping powers in inertial confinement fusion plasmas
journal, May 1993


Thermonuclear burn characteristics of compressed deuterium-tritium microspheres
journal, January 1974


Multi-group diffusion of energetic charged particles
journal, June 1975