ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Education, Training & Workforce Development
The Education, Training & Workforce Development Division provides communication among the academic, industrial, and governmental communities through the exchange of views and information on matters related to education, training and workforce development in nuclear and radiological science, engineering, and technology. Industry leaders, education and training professionals, and interested students work together through Society-sponsored meetings and publications, to enrich their professional development, to educate the general public, and to advance nuclear and radiological science and engineering.
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!
Latest Magazine Issues
Apr 2025
Jan 2025
Latest Journal Issues
Nuclear Science and Engineering
June 2025
Nuclear Technology
Fusion Science and Technology
May 2025
Latest News
ANS designates Armour Research Foundation Reactor as Nuclear Historic Landmark
The American Nuclear Society presented the Illinois Institute of Technology with a plaque last week to officially designate the Armour Research Foundation Reactor a Nuclear Historic Landmark, following the Society’s decision to confer the status onto the reactor in September 2024.
S. Besshou, K. Ogata, K. Kondo, T. Mizuuchi, K. Nagasaki, H. Okada, F. Sano, H. Zushi, T. Obiki
Fusion Science and Technology | Volume 27 | Number 3 | April 1995 | Pages 219-222
Helical Systems | doi.org/10.13182/FST95-A11947073
Articles are hosted by Taylor and Francis Online.
This paper describes the realization of magnetic detection of the finite β free boundary plasma shin for a toroidal helical plasma. Recent experimental results, the normalized displacement Δb/ap as a function of volume average beta <β>, are discussed. The measured typical plasma boundary shift, Δb/ap, in the standard Heliotron E configuration (Rp=2.20m, ap=0.21m, Ԏ/2ᴨ(0)~0.53, Ԏ/2ᴨ(ap)~2.8) is (5–12)x10–3, when the volume averaged beta is 0.50%. The measured normalized plasma boundary shift is nearly proportional to the diamagnetic volume-averaged beta, for values of beta up to 0.95%. The magnetically determined plasma boundary shift Δb is less than 3 mm. The measured shift is in the range in-between the expected upper limit (Δb/ap = β(0)/2βeq) and the lower limit (Δb/ap = <β>/2βeq), where βeq = (Ԏ/2ᴨ(ap))2(ap/Rp)~0.77 for the standard configuration of Heliotron E.
We find that the measured free boundary plasma shift strongly depends on the initial vacuum magnetic configuration parameters such as the horizontal position of magnetic axis and the rotational transform. When the vacuum magnetic axis is shifted inward toward the major axis, we observed a significant decrease of the normalized plasma shift (Δb/ap) and the plasma induced vertical field, which we interpret as being due to a reduction of Pfirsch-Schlüter current.
