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Trauchessec V, Drouet V, Chollet C, Cornet P, Masclet-Gobin I, Chardavoine S, Prunet P, Duchastenier W, Diaz R, Le Deroff L, Wrobel R, Depierreux S. Time-resolved near backscatter imaging system on Laser MegaJoule. Rev Sci Instrum 2022; 93:103519. [PMID: 36319331 DOI: 10.1063/5.0101786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 08/23/2022] [Indexed: 06/16/2023]
Abstract
The newly operating near-backscattering imaging (NBI) system on the Laser MegaJoule (LMJ) is briefly described with emphasis on the temporally resolved measurements and their synchronization with the LMJ laser pulse through target shots taken as part of the diagnostic commissioning campaign. The NBI measures the stimulated Brillouin and Raman scattered light around two quadruplets (one inner and one outer) of the upper LMJ hemisphere. The temporal resolution is achieved with a unique system: a specifically designed wide-open optical lens images 40 points of a diffuser onto an array of optical fibers with the scattered light recorded on a multiplexed photodiode array.
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Affiliation(s)
| | - V Drouet
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - C Chollet
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - P Cornet
- CEA, DAM, DIF, F-91297 Arpajon, France
| | | | | | - P Prunet
- CEA, DAM, CESTA, F33114 Le Barp, France
| | | | - R Diaz
- CEA, DAM, CESTA, F33114 Le Barp, France
| | | | - R Wrobel
- CEA, DAM, DIF, F-91297 Arpajon, France
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Debras G, Courtois C, Lambert F, Brygoo S, Duval A, Darbon S, Villette B, Masclet-Gobin I, Philippe F, Casner A, Seytor P, Videau L, Graillot H, Chies T, Henry O, Raffestin D, Chicanne C. Study of shock-coalescence on the LIL laser facility. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135902006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Darbon S, Duval A, Masclet-Gobin I, Marchet B, Brygoo S, Courtois C, Debras G, Patissou L, Parreault R, Lobios O, Mangeant M, Parrot S, Hartmann O. VISAR diagnostic at LIL facility. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20135913001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bourgade JL, Marmoret R, Darbon S, Rosch R, Troussel P, Villette B, Glebov V, Shmayda WT, Gomme JC, Le Tonqueze Y, Aubard F, Baggio J, Bazzoli S, Bonneau F, Boutin JY, Caillaud T, Chollet C, Combis P, Disdier L, Gazave J, Girard S, Gontier D, Jaanimagi P, Jacquet HP, Jadaud JP, Landoas O, Legendre J, Leray JL, Maroni R, Meyerhofer DD, Miquel JL, Marshall FJ, Masclet-Gobin I, Pien G, Raimbourg J, Reverdin C, Richard A, Rubin de Cervens D, Sangster CT, Seaux JP, Soullie G, Stoeckl C, Thfoin I, Videau L, Zuber C. Diagnostics hardening for harsh environment in Laser Megajoule (invited). Rev Sci Instrum 2008; 79:10F301. [PMID: 19044614 DOI: 10.1063/1.2991161] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The diagnostic designs for the Laser Megajoule (LMJ) will require components to operate in environments far more severe than those encountered in present facilities. This harsh environment will be induced by fluxes of neutrons, gamma rays, energetic ions, electromagnetic radiations, and, in some cases, debris and shrapnel, at levels several orders of magnitude higher than those experienced today on existing facilities. The lessons learned about the vulnerabilities of present diagnostic parts fielded mainly on OMEGA for many years, have been very useful guide for the design of future LMJ diagnostics. The present and future LMJ diagnostic designs including this vulnerability approach and their main mitigation techniques will be presented together with the main characteristics of the LMJ facility that provide for diagnostic protection.
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Affiliation(s)
- J L Bourgade
- CEA/DAM Ile de France, Bruyères le Châtel, 91297 Arpajon Cedex, France
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