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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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Latest News
Darleane C. Hoffman, transuranium element pioneer, dies at age 98
Hoffman
Nuclear chemist Darleane D. Hoffman, who was renowned for her research on transuranium elements that advanced the understanding of nuclear fission, died on September 4 at her home in Menlo Park, Calif. She was 98.
Iowa origins: Hoffman was born on November 8, 1926, in Terril, Ia. She attended Iowa State University, where she earned a bachelor’s degree in chemistry in 1948 and a doctorate in physical (or nuclear) chemistry in 1951. She then began working as a chemist at Oak Ridge National Laboratory.
Los Alamos research: In 1953, Hoffman began a research position at Los Alamos National Laboratory, where she conducted pioneering work on spontaneous fission. She served as the lab’s first female division leader in charge of the Chemistry and Nuclear Chemistry Division.
Kenkichi Ushigusa, JT-60 Team
Fusion Science and Technology | Volume 39 | Number 2 | March 2001 | Pages 315-321
Fusion Technology Plenary | doi.org/10.13182/FST01-A11963254
Articles are hosted by Taylor and Francis Online.
Progress on NNB technology enables to demonstrate the N-NB driven current of around 1 MA with the efficiency of 0.155×1020nT−2A/W. A newly installed 110GHz ECH system has demonstrated efficient central electron heating (Te(0)>15keV) and local current profile control. Multiple pellet injection from high-field-top side into ELMy H-mode plasma has produced a high confinement plasma (HHy2~1.05) at high density regime (ne/nGW~0.7). The both-leg divertor pumping has enhanced He exhaust by ~40%. Ar-puff experiments have improved confinement at high density with detached divertor due to high pedestal temperature. Based on these progresses in each issue, discharge optimization has been made to demonstrate integrated high performance plasmas. In the two advanced operation regimes (the reversed magnetic shear (RS) and the weak magnetic shear high-βp ELMy H-mode), discharges have been sustained near the steady-state current profile solution under full non-inductive current drive with proper driven current profiles (High βp; HHy2~1.4 and βN ~2.5 with N-NB, RS; HHy2~2.2 and βN ~2 with fBS~80%).
