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November 9–12, 2025
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Russia withdraws from 25-year-old weapons-grade plutonium agreement
Russia’s lower house of Parliament, the State Duma, approved a measure to withdraw from a 25-year-old agreement with the United States to cut back on the leftover plutonium from Cold War–era nuclear weapons.
Joel H. Fink
Fusion Science and Technology | Volume 11 | Number 2 | March 1987 | Pages 416-419
Technical Paper | Plasma Heating System | doi.org/10.13182/FST87-A25017
Articles are hosted by Taylor and Francis Online.
To suppress space charge blowup in an ion beam passing through a photoneutralizer, it is necessary to introduce some background gas. An analysis is presented of the neutralization of a high-energy, >200-keV negative deuterium ion beam, exposed to photodetachment while in the presence of deuterium. With a gas thickness of <0.01 Torr-cm, the neutral fraction in the output beam is found to be about the same as that gotten from the photoneutralizer operating in vacuum.