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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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.
Scott W. Haney, L. John Perkins, John Mandrekas, Weston M. Stacey, Jr.
Fusion Science and Technology | Volume 18 | Number 4 | December 1990 | Pages 606-617
Alpha Particles in Fusion Research | doi.org/10.13182/FST90-A29253
Articles are hosted by Taylor and Francis Online.
Work involving the selection and burn stability control of near-ignited operating points f or the International Thermonuclear Experimental Reactor (ITER) is described. Using simple volume-averaged zero-dimensional transport models, it is suggested that ITER operation at high densities (1 to 2 × 1020/m3) and low temperatures (6 to 10 keV) may be necessary, or even desirable, even though these plasma parameters are intrinsically thermally unstable. It is argued that these thermal instabilities can be effectively controlled using active feedback based on standard diagnostic signals. In particular, the physical and technological feasibility of three control methods, modulation of neutral beam power, modulation of fueling rate, and controlled injection of impurities, is considered, and recommendations regarding the applicability of these methods to ITER are made.