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September 8–11, 2025
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.
J. D. Galambos, L. John Perkins
Fusion Science and Technology | Volume 25 | Number 2 | March 1994 | Pages 176-181
Technical Paper | Fusion Reactor | doi.org/10.13182/FST94-A30266
Articles are hosted by Taylor and Francis Online.
If the next-step International Thermonuclear Experimental Reactor (ITER) is designed to operate at finite energy multiplication (Q ∼ 10 to 20), as opposed to ignition (Q ∼ ∞), appreciable reductions in size and cost will result. Ignition will be attainable in such a “high-Q targeted” device under slightly enhanced confinement conditions. For example, with the nominal design guidelines from the ITER Conceptual Design Activity (CDA), designing for Q = 15 instead of ignition results in ∼20% savings in size and cost. Ignition would still be achievable in such a reduced-size device if the L-mode energy confinement enhancement factor (i.e., H factor) is ∼15% higher than the assumed nominal value of 2.0. This size/cost impact is large compared to other sensitivities, and the range of H-fact or improvement needed to recoup ignition is small compared to the uncertainty in the confinement scalings themselves.