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Division Spotlight
Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
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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Latest News
Argonne’s METL gears up to test more sodium fast reactor components
Argonne National Laboratory has successfully swapped out an aging cold trap in the sodium test loop called METL (Mechanisms Engineering Test Loop), the Department of Energy announced April 23. The upgrade is the first of its kind in the United States in more than 30 years, according to the DOE, and will help test components and operations for the sodium-cooled fast reactors being developed now.
Franco Alladio, Paola Batistoni, Alessandro Mancuso
Fusion Science and Technology | Volume 22 | Number 4 | December 1992 | Pages 474-481
Alpha-Particle Special | doi.org/10.13182/FST92-A30083
Articles are hosted by Taylor and Francis Online.
The properties of alpha-particle confinement of l = 2 stellarat ors have been studied as a function of the aspect ratio (3 < R/a < 12). A collisionless orbit calculation has been performed numerically for stellarator configurations obtained by winding the helical currents on circular-cross-section tori with a constant pitch in toroidal coordinates. All the configurations studied exibit pronounced separatrixlike features that also rotate with constant pitch in toroidal coordinates. The fraction of alpha particles contained within the last closed magnetic surface rapidly increases with the aspect ratio and is >80% for R/a > 4. The escaping alpha particles cross the separatrix within narrow helical strips around the X-point path when it is between the inboard and the top of the torus. The particle motion is also followed outside the last closed magnetic surface. When the boundary (i.e., the surface where the helical currents flow) is sufficiently far from the plasma, the escaping alpha particles are found to remain trapped in the X-point region.