Observatorio de I+D+i UPM

Descripción
Nowadays, the projects LIFE (Laser Inertial Fusion Energy) inUSAand 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.
Internacional	Si
JCR del ISI	Si
Título de la revista	Nuclear Fusion
ISSN	0029-5515
Factor de impacto JCR	3,303
Información de impacto	Datos JCR del año 2010
Volumen
DOI
Número de revista	53
Desde la página	1
Hasta la página	12
Mes	SIN MES
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Esta actividad pertenece a memorias de investigación

• Autor: David Garoz Gomez (UPM)
• Autor: Raquel Gonzalez Arrabal (UPM)
• Autor: Rafael Juarez Mañas (UPM)
• Autor: Jesus Alvarez Ruiz (UPM)
• Autor: Javier Sanz (UNED)
• Autor: Jose Manuel Perlado Martin (UPM)
• Autor: Antonio Juan Rivera de Mena (UPM)

• Creador: Centro o Instituto I+D+i: Instituto de Fusión Nuclear