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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.
Conference on Nuclear Training and Education: A Biennial International Forum (CONTE 2021)
February 9–11, 2021
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Nuclear Science and Engineering
Fusion Science and Technology
Notes on fusion
The ST25-HTS tokamak.
Governments around the world have been interested in fusion for more than 70 years. Fusion research was largely secret until 1968, when the Soviets unveiled exciting results from their tokamak (a magnetic confinement fusion device with a particular configuration that produces a toroidal plasma). The Soviets realized that tokamaks were not useful as weapons but could produce plasma in the million-degree temperature range to demonstrate Soviet scientific and technical prowess to the world.
Following this breakthrough, government laboratories around the world continued to pursue various methods of confining hot plasma to understand plasma physics under extreme conditions, getting closer and closer to the conditions necessary for fusion energy production. Tokamaks have been by far the most successful configuration. In the 1990s, the Tokamak Fusion Test Reactor at the Princeton Plasma Physics Laboratory produced 10 MW of fusion power using deuterium-tritium fusion. A few years later, the Joint European Torus (JET) in the United Kingdom increased that to 16 MW, getting close to breakeven using 24 MW of power to heat the plasma.
Li-Xian Fang, Sheng-Yan Lin, Fu Zeng, Chi-Hu Wang, Yong-Cheng Xie
Nuclear Technology | Volume 195 | Number 1 | July 2016 | Pages 71-78
Technical Paper | dx.doi.org/10.13182/NT15-62
Articles are hosted by Taylor and Francis Online.
In this paper, we study the relationship between correlation dimension and signal structure based on nonlinear fractal theory. It shows that when the signal structure is more complex, the correlation dimension is higher. By analyzing background noise, the impact signals of loose parts, and the correlation dimensions of impact signals from background signals, we find that the change of correlation dimensions can reflect the situation of loose parts in reactor operation greatly, and the nonlinear feature of loose parts is consistent at some point. This method can be used to test the initial loosening of parts and to provide an effective way to improve the stability of loose-part monitoring systems.