Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Silica final lens performance in laser fusion facilities: HiPER and LIFE
Year:2013
Research Areas
  • Engineering
Information
Abstract
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.
International
Si
JCR
Si
Title
Nuclear Fusion
ISBN
0029-5515
Impact factor JCR
3,303
Impact info
Datos JCR del año 2010
Volume
Journal number
53
From page
1
To page
12
Month
SIN MES
Ranking
Participants
  • Autor: David Garoz Gómez (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)
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: Instituto de Fusión Nuclear
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