Systematic Analysis of Direct-Drive Baseline Designs for Shock-Ignition with the Laser Megajoule

Brandon, V. and Canaud, B. and Laffite, S. and Temporal, Mauro and Ramis Abril, Rafael (2011). Systematic Analysis of Direct-Drive Baseline Designs for Shock-Ignition with the Laser Megajoule. In: "7th Conference on Inertial Fusion Sciences and Applications, IFSA 2011", 12/09/2011 - 16/09/2011, Bordeaux-Lac, Francia. pp..

Description

Title: Systematic Analysis of Direct-Drive Baseline Designs for Shock-Ignition with the Laser Megajoule
Author/s:
  • Brandon, V.
  • Canaud, B.
  • Laffite, S.
  • Temporal, Mauro
  • Ramis Abril, Rafael
Item Type: Presentation at Congress or Conference (Article)
Event Title: 7th Conference on Inertial Fusion Sciences and Applications, IFSA 2011
Event Dates: 12/09/2011 - 16/09/2011
Event Location: Bordeaux-Lac, Francia
Title of Book: Proceedings of the 7th Conference on Inertial Fusion Sciences and Applications, IFSA 2011
Date: 2011
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Física Aplicada a la Ingeniería Aeronáutica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Direct-drive inertial confinement thermonuclear fusion consists in illuminating a shell of cryogenic Deuterium and Tritium (DT) mixture with many intense beams of laser light. Capsule is composed of DT gassurrounded by cryogenic DT as combustible fuel. Basic rules are used to define shell geometry from aspect ratio, fuel mass and layers densities. We define baseline designs using two aspect ratio (A=3 and A=5) who complete HiPER baseline design (A=7.7). Aspect ratio is defined as the ratio of ice DT shell inner radius over DT shell thickness. Low aspect ratio improves hydrodynamics stabilities of imploding shell. Laser impulsion shape and ablator thickness are initially defined by using Lindl (1995) pressure ablation and mass ablation formulae for direct-drive using CH layer as ablator. In flight adiabat parameter is close to one during implosion. Velocitie simplosions chosen are between 260 km/s and 365 km/s. More than thousand calculations are realized for each aspect ratio in order to optimize the laser pulse shape. Calculations are performed using the one-dimensional version of the Lagrangian radiation hydrodynamics FCI2. We choose implosion velocities for each initial aspect ratio, and we compute scaled-target family curves for each one to find self-ignition threshold. Then, we pick points on each curves that potentially product high thermonuclear gain and compute shock ignition in the context of Laser MegaJoule. This systematic analyze reveals many working points which complete previous studies ´allowing to highlight baseline designs, according to laser intensity and energy, combustible mass and initial aspect ratio to be relevant for Laser MegaJoule.

More information

Item ID: 12578
DC Identifier: http://oa.upm.es/12578/
OAI Identifier: oai:oa.upm.es:12578
Official URL: http://www.ifsa11.org/
Deposited by: Memoria Investigacion
Deposited on: 03 Aug 2012 10:39
Last Modified: 21 Apr 2016 11:50
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