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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Fusion Science and Technology
August 2025
Latest News
The newest era of workforce development at ANS
As most attendees of this year’s ANS Annual Conference left breakfast in the Grand Ballroom of the Chicago Downtown Marriott to sit in on presentations covering everything from career pathways in fusion to recently digitized archival nuclear films, 40 of them made their way to the hotel’s fifth floor to take part in the second offering of Nuclear 101, a newly designed certification course that seeks to give professionals who are in or adjacent to the industry an in-depth understanding of the essentials of nuclear energy and engineering from some of the field’s leading experts.
Masami Ohnishi
Fusion Science and Technology | Volume 2 | Number 4 | October 1982 | Pages 609-616
Technical Paper | Plasma Engineering | doi.org/10.13182/FST82-A20801
Articles are hosted by Taylor and Francis Online.
Since an ignited deuterium-tritium plasma of a moving ring compact torus reactor (MRCTR) is thermally unstable at the operating temperature, suppression of the thermal instability is an essential issue for maintaining the stationary burning of a plasma. The feedback stabilization by means of major radial compression-decompression is proposed for a burn control in an MRCTR. The compression-decompression is carried out through the regulation of the solenoidal magnetic field according to the deviation of the ion temperature from the equilibrium value. The dynamics of a plasma core with a feedback control is calculated in a zero-dimensional plasma model assuming the empirical confinement scalings obtained in the present tokamak experiments. The effects of ion density on the dynamics are also studied for two extreme cases of complete particle recycling and perfect pumping. The scheme is found to be effective for the burn control. The deviations of a major radius and a fusion output power are less than several percents of the equilibrium values during the control to suppress the temperature excursion. The rate of change in the magnetic field for the control is as slow as 500 G/s.
