Silica final lens performance in laser fusion facilities: HiPER and LIFE

Garoz, D. and Gonzalez Arrabal, Raquel and Juarez Mañas, Rafael and Alvarez Ruiz, Jesus and Sanz, J. and Perlado Martín, José Manuel and Rivera de Mena, Antonio (2012). Silica final lens performance in laser fusion facilities: HiPER and LIFE. "Nuclear Fusion", v. 53 (n. 1); pp. 1-12. ISSN 0029-5515. https://doi.org/10.1088/0029-5515/53/1/013010.

Description

Title: Silica final lens performance in laser fusion facilities: HiPER and LIFE
Author/s:
  • Garoz, D.
  • Gonzalez Arrabal, Raquel
  • Juarez Mañas, Rafael
  • Alvarez Ruiz, Jesus
  • Sanz, J.
  • Perlado Martín, José Manuel
  • Rivera de Mena, Antonio
Item Type: Article
Título de Revista/Publicación: Nuclear Fusion
Date: 2012
ISSN: 0029-5515
Volume: 53
Subjects:
Faculty: E.T.S.I. Aeronáuticos (UPM)
Department: Motopropulsión y Termofluidodinámica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Nowadays, the projects LIFE (Laser Inertial Fusion Energy) in USA and HiPER (High Power Laser Energy Research) in Europe are the most advanced ones to demonstrate laser fusion energy viability. One of the main points of concern to properly achieve ignition is the performance of the final optics (lenses) under the severe irradiation conditions that take place in fusion facilities. In this paper, we calculate the radiation fluxes and doses as well as the radiation-induced temperature enhancement and colour centre formation in final lenses assuming realistic geometrical configurations for HiPER and LIFE. On these bases, the mechanical stresses generated by the established temperature gradients are evaluated showing that from a mechanical point of view lenses only fulfil specifications if ions resulting from the imploding target are mitigated. The absorption coefficient of the lenses is calculated during reactor startup and steady-state operation. The obtained results reveal the necessity of new solutions to tackle ignition problems during the startup process for HiPER. Finally, we evaluate the effect of temperature gradients on focal length changes and lens surface deformations. In summary, we discuss the capabilities and weak points of silica lenses and propose alternatives to overcome predictable problems

More information

Item ID: 25696
DC Identifier: http://oa.upm.es/25696/
OAI Identifier: oai:oa.upm.es:25696
DOI: 10.1088/0029-5515/53/1/013010
Deposited by: Memoria Investigacion
Deposited on: 19 Nov 2014 19:06
Last Modified: 06 Sep 2017 16:09
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