Lifetime of silica final lenses subject to HiPER irradiation conditions

Rivera de Mena, Antonio and Garoz Gómez, David and Juarez Mañas, Rafael and Alvarez Ruiz, Jesus and Gonzalez Arrabal, Raquel and Perlado Martín, José Manuel (2011). Lifetime of silica final lenses subject to HiPER irradiation conditions. In: "High power lasers for fusion research", 25/01/2011 - 27/01/2011, San Francisco, CA, EEUU. ISBN 9780819484536. https://doi.org/10.1117/12.876163.

Description

Title: Lifetime of silica final lenses subject to HiPER irradiation conditions
Author/s:
  • Rivera de Mena, Antonio
  • Garoz Gómez, David
  • Juarez Mañas, Rafael
  • Alvarez Ruiz, Jesus
  • Gonzalez Arrabal, Raquel
  • Perlado Martín, José Manuel
Item Type: Presentation at Congress or Conference (Article)
Event Title: High power lasers for fusion research
Event Dates: 25/01/2011 - 27/01/2011
Event Location: San Francisco, CA, EEUU
Title of Book: Proceedings of SPIE, High power lasers for fusion research,
Date: 2011
ISBN: 9780819484536
Volume: 7916
Subjects:
Faculty: E.T.S.I. Industriales (UPM)
Department: Ingeniería Nuclear [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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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.

More information

Item ID: 12621
DC Identifier: http://oa.upm.es/12621/
OAI Identifier: oai:oa.upm.es:12621
DOI: 10.1117/12.876163
Deposited by: Memoria Investigacion
Deposited on: 06 Aug 2012 08:36
Last Modified: 07 Sep 2017 18:00
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