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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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Fusion Science and Technology
Latest News
Russia withdraws from 25-year-old weapons-grade plutonium agreement
Russia’s lower house of Parliament, the State Duma, approved a measure to withdraw from a 25-year-old agreement with the United States to cut back on the leftover plutonium from Cold War–era nuclear weapons.
H. C. Mantz, D. A. Bowers, F. R. Williams, J. W. Sapp, M. A. Witten
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1133-1137
Ignition Device | doi.org/10.13182/FST91-A29495
Articles are hosted by Taylor and Francis Online.
The purpose of the inboard limiter of the Compact Ignition Tokamak (CIT) is to protect the vacuum vessel from high heat loads during operation. The limiter components must be maintained remotely; therefore, they must be designed to reduce maintenance time as much as possible. This drives the design toward larger tiles to reduce the number of items to be replaced; however, other factors drive the design toward smaller tiles. The thickness of the tiles must also be as small as possible to reduce overall build of the distance from the inner magnet leg to the plasma. This paper presents the factors involved in sizing of the tiles and shows design concepts for several sizes of tiles. It also discusses the material development that has been accomplished to date and the development in work to increase the thermal conductivity and strength of carbon-carbon materials for use as the limiter material.