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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.
A. L. Rogister
Fusion Science and Technology | Volume 37 | Number 2 | March 2000 | Pages 287-295
Instabilities and Transport | doi.org/10.13182/FST00-A11963223
Articles are hosted by Taylor and Francis Online.
We review some of the theoretical interpretations which have been given for the formation of the high E→r x B→ rotation shear layer observed concomitantly with the transition to and the operation in the high confinement mode. Those can be classified as follows: the origin of the large radial electric field is (i) anomalous, (ii) associated with loss of ions along open orbits (i.e. crossing the separatrix), (iii) related to the decoupling of the ion and electron flows by finite Larmor radius effects and inertia. It is generally accepted that E→r x B→ shear reduces the level of microturbulence and thus of anomalous transport; this point of view is adopted here and explained.