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2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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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.
Kai Masuda, Tomoya Nakagawa, Taiju Kajiwara, Heishun Zen, Kiyoshi Yoshikawa, Kazunobu Nagasaki
Fusion Science and Technology | Volume 56 | Number 1 | July 2009 | Pages 523-527
Experimental Facilities and Nonelectric Applications | Eighteenth Topical Meeting on the Technology of Fusion Energy (Part 1) | doi.org/10.13182/FST09-A8956
Articles are hosted by Taylor and Francis Online.
An inertial electrostatic confinement (IEC) fusion device driven by a ring-shaped built-in ion source is proposed and designed aiming at a reduced operating gas pressure in order to explore a possibility of a drastic enhancement in the fusion reaction rate in the envisaged beam-beam collision regime. In the present scheme ions will be extracted from a ring-shaped magnetron discharge plasma toward an IEC cathode grid placed concentrically at the center. A prototype ion source showed an accessible pressure of 5 mPa, which is hundreds times as low as the conventional glow-discharge-driven IEC. Dependence of the ion source current and extraction efficiency on the central IEC cathode voltage was studied by prototype experiments and numerical calculations. An IEC device with a built-in ion source was then designed based on these results. The expected IEC grid current is ~0.4 mA at 5 mPa, where observation of the beam-beam fusion contribution is anticipated.