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September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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.
D. A. Bowers, J. R. Haines, M. D. McSmith, V. D. Lee
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1138-1142
Ignition Device | doi.org/10.13182/FST91-A29496
Articles are hosted by Taylor and Francis Online.
The Compact Ignition Tokamak (CIT) project, led by the Princeton Plasma Physics Laboratory, will employ a double null poloidal divertor as its primary means of energy and particle removal from the plasma. The fusion power handling capability of the divertor may represent the most severe constraint on the operating envelope for CIT. In addition to identifying this envelope based on divertor thermal performance, several studies aimed at improving this performance were examined. The reference divertor design concept employs small modules with pyrolytic graphite (PG) tiles. Studies of the sensitivity of the thermal performance of the passively cooled PG divertor design to separatrix sweeping parameters showed that a single pass sweep is near optimal for CIT conditions. An examination of the thermal performance of alternate materials found that some improvement (up to 20%) in the power handling capability of the divertor may be possible by using higher conductivity forms of PG, although the mechanical properties of these materials are not currently available. Alternate power handling approaches were examined and shown to have no significant improvement in thermal performance over the baseline passively cooled approach.