Observatorio de I+D+i UPM

Descripción
The goal of the European laser fusion project, is to build an engineering facility for repetitive laser operation (HiPER 4a) and later a fusion reactor (HiPER 4b). A key aspect for laser fusion energy is the final optics. At the moment, it is based on silica transmission lenses located 8 m away from the chamber center. Lens lifetime depends on the irradiation conditions. We have used a 48 MJ shock ignition target for calculations. We have studied the thermo-mechanical effects of ions and X-rays on the lenses. Ions lead to lens melting and must therefore be mitigated. On the other hand, X-rays (~1% of the energy) does not produce either a significant temperature rise or detrimental stresses. Finally, we calculated the neutron flux and gamma dose rate on the lenses. Next, based on a simple model we studied the formation of color centers in the sample, which lead to optical absorption. Calculations show that simultaneous neutron and gamma irradiation does not significantly increase the optical absorption during the expected lifetime of the HiPER 4a facility. Under severe conditions (HiPER 4b), operation above 800 K or lens refreshing by thermal annealing treatments seem to assure adequate behavior.
Internacional	Si
Nombre congreso	SPIE Photonics West
Tipo de participación	960
Lugar del congreso	San Francisco, CA, EEUU
Revisores	Si
ISBN o ISSN	0000-0000
DOI	10.1117/12.876163
Fecha inicio congreso	25/01/2011
Fecha fin congreso	27/01/2011
Desde la página	1
Hasta la página	12
Título de las actas	Proceedings of the Conference

Esta actividad pertenece a memorias de investigación

• Autor: Antonio Juan Rivera de Mena (UPM)
• Autor: D. Garoz (DENIM)
• Autor: Rafael Juarez Mañas (UPM)
• Autor: Jesus Alvarez Ruiz (UPM)
• Autor: Raquel Gonzalez Arrabal (UPM)
• Autor: Jose Manuel Perlado Martin (UPM)

• Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
• Centro o Instituto I+D+i: Instituto de Fusión Nuclear
• Departamento: Ingeniería Nuclear