Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Lifetime of silica final lenses subject to HiPER irradiation conditions
Year:2011
Research Areas
  • Engineering
Information
Abstract
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.
International
Si
Congress
SPIE Photonics West
960
Place
San Francisco, CA, EEUU
Reviewers
Si
ISBN/ISSN
0000-0000
10.1117/12.876163
Start Date
25/01/2011
End Date
27/01/2011
From page
1
To page
12
Proceedings of the Conference
Participants
  • 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)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
  • Centro o Instituto I+D+i: Instituto de Fusión Nuclear
  • Departamento: Ingeniería Nuclear
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
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