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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Fusion Science and Technology
August 2025
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The newest era of workforce development at ANS
As most attendees of this year’s ANS Annual Conference left breakfast in the Grand Ballroom of the Chicago Downtown Marriott to sit in on presentations covering everything from career pathways in fusion to recently digitized archival nuclear films, 40 of them made their way to the hotel’s fifth floor to take part in the second offering of Nuclear 101, a newly designed certification course that seeks to give professionals who are in or adjacent to the industry an in-depth understanding of the essentials of nuclear energy and engineering from some of the field’s leading experts.
Yasushi Yamamoto, Kiyoshi Yoshikawa, Hisayuki Toku, Tsuneyuki Haga
Fusion Science and Technology | Volume 17 | Number 4 | July 1990 | Pages 540-554
Technical Paper | Beam Direct Conversion | doi.org/10.13182/FST90-A29190
Articles are hosted by Taylor and Francis Online.
Experiments and simulations were performed for helium ion beams to confirm the general validity of the two-dimensional beam direct energy conversion simulation code KUAD (Kyoto University Advanced Dart) for a wide range of beam parameters and to better understand how the performance of beam direct energy recovery is dependent on beam parameters. The experiments compared currents in the 60- to 140-mA range for 15-keV beam energy and from 130 to 250 mA for 20-keV beam energy. Beam behaviors numerically predicted for different currents and collector potentials were verified. Numerically obtained performance characteristics of the beam direct energy recovery generally show excellent agreement with experimental results within experimental errors. The only discrepancy occurs in the vicinity of the collector potential corresponding to the maximum energy recovery due to possible deviation from the axisymmetry of electrodes and to their small misalignment with respect to the beam axis. Beam perveance rather than beam energy or current is a good parameter for the evaluation of the performance of beam direct energy recovery. Maximum energy recovery efficiencies of 87 ± 4% for 15-keV and 85 ± 4% for 20-keV beams have been achieved.
