Irradiation uniformity at the Laser MegaJoule facility in the context of the shock ignition scheme

Temporal, Mauro and Canaud, B. and Garbett, Warren J. and Ramis Abril, Rafael and Weber, Stefan (2014). Irradiation uniformity at the Laser MegaJoule facility in the context of the shock ignition scheme. "High Power Laser Science and Engineering", v. 2 (n. e8); pp. 1-12. ISSN 1359-8139. https://doi.org/10.1017/hpl.2014.12.

Description

Title: Irradiation uniformity at the Laser MegaJoule facility in the context of the shock ignition scheme
Author/s:
  • Temporal, Mauro
  • Canaud, B.
  • Garbett, Warren J.
  • Ramis Abril, Rafael
  • Weber, Stefan
Item Type: Article
Título de Revista/Publicación: High Power Laser Science and Engineering
Date: April 2014
ISSN: 1359-8139
Volume: 2
Subjects:
Freetext Keywords: inertial confinement fusion; shock ignition; laser system
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Física Aplicada a las Ingenierías Aeronáutica y Naval
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The use of the Laser MegaJoule facility within the shock ignition scheme has been considered. In the first part of the study, one-dimensional hydrodynamic calculations were performed for an inertial confinement fusion capsule in the context of the shock ignition scheme providing the energy gain and an estimation of the increase of the peak power due to the reduction of the photon penetration expected during the high-intensity spike pulse. In the second part, we considered a Laser MegaJoule configuration consisting of 176 laser beams that have been grouped providing two different irradiation schemes. In this configuration the maximum available energy and power are 1.3 MJ and 440 TW. Optimization of the laser?capsule parameters that minimize the irradiation non-uniformity during the first few ns of the foot pulse has been performed. The calculations take into account the specific elliptical laser intensity profile provided at the Laser MegaJoule and the expected beam uncertainties. A significant improvement of the illumination uniformity provided by the polar direct drive technique has been demonstrated. Three-dimensional hydrodynamic calculations have been performed in order to analyse the magnitude of the azimuthal component of the irradiation that is neglected in twodimensional hydrodynamic simulations.

More information

Item ID: 35810
DC Identifier: http://oa.upm.es/35810/
OAI Identifier: oai:oa.upm.es:35810
DOI: 10.1017/hpl.2014.12
Official URL: http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=9241892&fileId=S2095471914000127
Deposited by: Memoria Investigacion
Deposited on: 25 Aug 2015 16:14
Last Modified: 25 Aug 2015 16:14
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