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

Garoz, D.; Gonzalez Arrabal, Raquel; Juarez Mañas, Rafael; Alvarez Ruiz, Jesus; Sanz, J.; Perlado Martín, José Manuel y 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.

Descripción

Título: Silica final lens performance in laser fusion facilities: HiPER and LIFE
Autor/es:
  • Garoz, D.
  • Gonzalez Arrabal, Raquel
  • Juarez Mañas, Rafael
  • Alvarez Ruiz, Jesus
  • Sanz, J.
  • Perlado Martín, José Manuel
  • Rivera de Mena, Antonio
Tipo de Documento: Artículo
Título de Revista/Publicación: Nuclear Fusion
Fecha: 2012
Volumen: 53
Materias:
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Motopropulsión y Termofluidodinámica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

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

Más información

ID de Registro: 25696
Identificador DC: http://oa.upm.es/25696/
Identificador OAI: oai:oa.upm.es:25696
Identificador DOI: 10.1088/0029-5515/53/1/013010
Depositado por: Memoria Investigacion
Depositado el: 19 Nov 2014 19:06
Ultima Modificación: 06 Sep 2017 16:09
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