Memorias de investigación
Ponencias en congresos:
Lifetime of silica final lenses subject to HiPER irradiation conditions
Año:2011
Áreas de investigación
  • Ingenierías
Datos
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
Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
  • Centro o Instituto I+D+i: Instituto de Fusión Nuclear
  • Departamento: Ingeniería Nuclear