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Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Fusion Science and Technology
Latest News
NRC nominee Nieh commits to independent safety mission
During a Senate Environment and Public Works Committee hearing today, Ho Nieh, President Donald Trump’s nominee to serve as a commissioner at the Nuclear Regulatory Commission, was urged to maintain the agency’s independence regardless of political pressure from the Trump administration.
E. A. Vinitskiy, D. L. Ulasevich, A. S. Prishvitsyn, N. E. Efimov, R. R. Khayrutdinov, S. A. Krat
Fusion Science and Technology | Volume 81 | Number 5 | July 2025 | Pages 485-494
Research Article | doi.org/10.1080/15361055.2024.2431782
Articles are hosted by Taylor and Francis Online.
A novel design of a continuous toroidal solenoid for the small spherical tokamak MEPhIST-0 is presented. The solenoid’s geometry is optimized in regard to stray magnetic fields perpendicular to the toroidal fields based on Maxwell’s equations and interface conditions for magnetic fields. The solutions obtained may in theory provide the level of stray fields ~10−10 of the toroidal fields. The design of the solenoid is tested by means of COMSOL modeling. The observed ratio of stray fields to the toroidal component of magnetic fields, Bp/BT is approximately ~0.4% at the plasma center. A ripple of the toroidal magnetic field at the edge of the plasma of δ ~ 0.8% is observed. The possibility of plasma breakdown with the chosen toroidal solenoid configuration was evaluated using the DINA calculation code.
