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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
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.
A. A. Kabantsev, C. F. Driscoll (18R13)
Fusion Science and Technology | Volume 51 | Number 2 | February 2007 | Pages 96-99
Technical Paper | Open Magnetic Systems for Plasma Confinement | doi.org/10.13182/FST07-A1324
Articles are hosted by Taylor and Francis Online.
We study ion-induced instability of flute-like (kz [approximately equal to] 0) diocotron modes in pure electron plasmas confined in a cylindrical Penning-Malmberg trap. In the absence of positive ion contamination, the low m diocotron modes are either neutrally stable (for m = 1) or weakly damped (for m = 2,3...) by Landau resonance on electrons corotating with the diocotron waves. By adding a small fraction (<1%) of positive ions into a double-well confinement configuration, we observe exponential instability of low m diocotron modes. The growth rates m are directly proportional to the overall ion fraction, Ni/Ne, and proportional to an effective charge separation of electrons and ions in the periodic wave perturbation.