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Fusion Science and Technology
Latest News
Strontium: Supply-and-demand success for the DOE’s Isotope Program
The Department of Energy’s Isotope Program (DOE IP) announced last week that it would end its “active standby” capability for strontium-82 production about two decades after beginning production of the isotope for cardiac diagnostic imaging. The DOE IP is celebrating commercialization of the Sr-82 supply chain as “a success story for both industry and the DOE IP.” Now that the Sr-82 market is commercially viable, the DOE IP and its National Isotope Development Center can “reassign those dedicated radioisotope production capacities to other mission needs”—including Sr-89.
M. Nagata, Y. Kinugasa, T. Uyama
Fusion Science and Technology | Volume 27 | Number 3 | April 1995 | Pages 387-390
Compact Torus (Field-Reversed Configuration, Spheromak) Concepts | doi.org/10.13182/FST95-A11947112
Articles are hosted by Taylor and Francis Online.
A spheromak configuration consisting of bias flux surrounding a core region of closed flux surfaces has been successfully sustained in the Flux Amplification Compact Torus (FACT) device by DC/Coaxial helicity injection. In this experiment, the energy transfer efficiency is estimated to be about 30%. The relaxed configuration posseses a low q profile (1/3<q<1/2) whose shape implies that the current density is concentrated in the core and which is maintained by the process of MHD relaxation. The current conversion and rapid inward diffusion of the injected current is found to be significantly related to the n=1 helical deformation of the open field lines along the geometric axis. In this paper, we present some design parameters for the planned Helicity Injected Spherical Torus (HIST) which will permit a corresponding investigation to the above to be made for a tokamak.