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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.
W. T. Shmayda, D. R. Harding, V. A. Versteeg, C. Kingsley, M. Hallgren, S. J. Loucks
Fusion Science and Technology | Volume 63 | Number 2 | March-April 2013 | Pages 87-94
Technical Paper | Selected papers from 20th Target Fabrication Meeting, May 20-24, 2012, Santa Fe, NM, Guest Editor: Robert C. Cook | doi.org/10.13182/FST13-A16325
Articles are hosted by Taylor and Francis Online.
Debris with footprints smaller than 40 m2 on the outer and inner surfaces with heights of <10 m on outer surfaces and [approximately]1 m on inner surfaces is present on cryogenic targets used for inertial confinement fusion studies on OMEGA. These features form during the gas-filling and cooling processes used to produce cryogenic deuterium (D2) and deuterium-tritium (DT) targets. The amount of debris on the surface has varied since the inception of the Laboratory for Laser Energetics' (LLE's) cryogenic program. The cause of the contamination is attributed to the cryogenic equipment high-vacuum and cleanliness limitations and to the radiolytic degradation of polymers. Empirical observations and a review of the processing conditions suggest that 1 mol of condensable contaminant is sufficient to account for the debris observed on a typical cryogenic target. This translates into a 3-ppm impurity content in the DT fuel.This paper focuses on condensed gases as one source of debris. It is postulated that methane, water, and nitrogen accompany the DT fuel transfer when it is transferred from the uranium storage beds that hold the DT fuel to the permeation cell where the targets are filled.