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Atlanta, GA|Atlanta Marriott Marquis
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Fusion Science and Technology
July 2025
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Hash Hashemian: Visionary leadership
As Dr. Hashem M. “Hash” Hashemian prepares to step into his term as President of the American Nuclear Society, he is clear that he wants to make the most of this unique moment.
A groundswell in public approval of nuclear is finding a home in growing governmental support that is backed by a tailwind of technological innovation. “Now is a good time to be in nuclear,” Hashemian said, as he explained the criticality of this moment and what he hoped to accomplish as president.
H. Takenaga, H. Kubo, Y. Kamada, Y. Miura, Y. Kishimoto, T. Ozeki
Fusion Science and Technology | Volume 50 | Number 4 | November 2006 | Pages 503-507
Technical Paper | doi.org/10.13182/FST06-A1273
Articles are hosted by Taylor and Francis Online.
Accumulation of impurity injected for reduction of heat load to the divertor plates was of great concern with a peaked density profile. Applicability of impurity injection to a burning plasma with a peaked density profile was investigated for various impurity accumulation levels using the A-SSTR2 design parameters. Impurity transport analysis indicated that the argon density profile twice as peaked as the electron density profile can yield acceptable radiation profile even with a peaked density profile. The required confinement improvement factor over the IPB98(y,2) scaling slightly increased from 1.4 with the flat density profile to 1.5 with the peaked electron density profile at ne(r/a = 0)/ne(r/a = 0.7) ~ 3. When the argon density profile was determined by neoclassical transport, the radiation loss in the core plasma intensively increased with the peaked density profile, which requires higher confinement enhancement factor of 1.9 at ne(r/a = 0)/ne(r/a = 0.7) ~ 3.