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Division members promote the advancement of mathematical and computational methods for solving problems arising in all disciplines encompassed by the Society. They place particular emphasis on numerical techniques for efficient computer applications to aid in the dissemination, integration, and proper use of computer codes, including preparation of computational benchmark and development of standards for computing practices, and to encourage the development on new computer codes and broaden their use.
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Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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Fusion Science and Technology
Latest News
Taking shape: Fusion energy ecosystems built with public-private partnerships
It’s possible to describe fusion in simple terms: heat and squeeze small atoms to get abundant clean energy. But there’s nothing simple about getting fusion ready for the grid.
Private developers, national lab and university researchers, suppliers, and end users working toward that goal are developing a range of complex technologies to reach fusion temperatures and pressures, confounded by science and technology gaps linked to plasma behavior; materials, diagnostics, and electronics for extreme environments; fuel cycle sustainability; and economics.
J. Manzagol, G. Paquignon, D. Brisset, P. Bonnay, E. Bouleau, D. Chatain, M. Chichoux, D. Communal, V. Lamaison, J. P. Perin
Fusion Science and Technology | Volume 59 | Number 1 | January 2011 | Pages 159-165
Technical Paper | Nineteenth Target Fabrication Meeting | doi.org/10.13182/FST11-A11519
Articles are hosted by Taylor and Francis Online.
The Laser Mégajoule (LMJ) cryogenic target is protected from ambient thermal radiation by a thermal shroud. When the cryotarget, held by the cryotarget positioner, is at the LMJ chamber center, the thermal shroud has to be removed just before the shot to allow the laser beams to reach the laser entrance hole of the cavity.The shroud remover, PET, will have to disconnect the thermal shroud from the cryogenic target base without disturbing the target base temperature regulation ([approximately]18 K ± 2 mK), which guarantees the needed cryogenic target conditions to reach the ignition.The shroud withdrawal is divided into two successive phases: a slow withdrawal for the thermal disconnection between shroud and target base and a fast withdrawal for a quick extraction of the shroud out of the laser beamways pointing onto the cavity. The slow shroud withdrawal must be handled within 30 min to respect laser pointing stability. After the final target alignment at the chamber center, the shroud must be ejected 0.5 m away from the source point in <0.1 s before the shot.To cope with all these issues, a prototype of the shroud remover, PPET, has been first built and developed at CEA-Grenoble, at INAC/SBT, before being tested at CEA-CESTA on the DEMOCRYTE setup, a prototype of the cryogenic target charger and holder.The experimental results mainly obtained at CEA-CESTA in 2008 and 2009 on two generations of target bases and shrouds are presented in this paper.