Nuclear background effects on plasma diagnostics for megajoule class laser facility

A. Rousseau (1) , S. Darbon (1) , P. Paillet (1) , Sylvain Girard (2) , J.L. Bourgade (1) , Melanie Raine (1) , O. Duhamel (1) , Vincent Goiffon (3) , P. Magnan (3) , A. Chabane (3) , Paola Cervantes (3) , Matthieu Hamel (4) , Jean Larour (5)

1 DAM/DIF - DAM Île-de-France
2 LHC - Laboratoire Hubert Curien
3 ISAE-SUPAERO - Institut Supérieur de l'Aéronautique et de l'Espace
4 LCAE - Laboratoire Capteurs et Architectures Electroniques
5 LPP - Laboratoire de Physique des Plasmas

Estimating the vulnerability is a key challenge for plasma diagnostics designed to operate in radiative background associated with megajoule class laser facilities. Since DT shots at OMEGA laser facility reproduce the perturbing source expected during the first 100 nanoseconds of a typical DT shot realized at National Ignition Facility (NIF) and Laser MegaJoule facility (LMJ), vulnerability of diagnostic elements such as optical relays or optical analyzers were experimentally studied and, if necessary, hardening approaches have been initiated to authorize their use at higher radiative constraints. Other facilities such as nuclear reactor or accelerator have been also used to estimate vulnerability issues as radiation induced emission of glasses or damage in multilayer coatings.

Keywords: optical analyzer; optical relay; laser facility; DT shot; Laser MegaJoule; plasma diagnostics; vulnerability; high radiative constraints; radiation; hardening; nuclear reactor; accelerator; multilayer coating; damage

Domains: Engineering Sciences [physics]; Optics / Photonic; Engineering Sciences [physics]; Plasmas; Physics [physics]; Nuclear Experiment [nucl-ex]

A. Rousseau, S. Darbon, P. Paillet, Sylvain Girard, J.L. Bourgade, et al.. Nuclear background effects on plasma diagnostics for megajoule class laser facility. Target Diagnostics Physics and Engineering for Inertial Confinement Fusion II, Aug 2013, San Diego, United States. pp.885004, ⟨10.1117/12.2024005⟩. ⟨ujm-00871773⟩