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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.
Kazunobu Nagasaki, Sakuji Kobayashi, Kinzo Sakamoto, Hideki Zushi, Tokuhiro Obiki, Kunizo Ohkubo, Minoru Kawaguchi, Gregory G. Denisov, Arkady L. Goldenberg, Vadim I. Kurbatov, Viktor B. Orlov, Dmitry V. Vinogradov
Fusion Science and Technology | Volume 32 | Number 2 | September 1997 | Pages 287-295
Technical Paper | Plasma Heating System | doi.org/10.13182/FST97-A19898
Articles are hosted by Taylor and Francis Online.
A 106-GHz electron cyclotron heating system is installed and operated for plasma production and heating of the Heliotron-E helical device. The Gaussian beam radiated from the gyrotron is coupled to the HE11 waveguide mode by the matching optics unit (MOU), then transmitted through 15-m corrugated waveguides and four miter bends. The system is closed for safety to prevent spurious modes from radiating into the free space and is operated at atmospheric pressure. The transmitted wave is launched from the outside of the torus, and the launched beam is focused on the magnetic axis so that the power deposition is expected to be localized at the desired resonance region. The measured transmission efficiency from the MOU output to the launcher output is 86%, which is in good agreement with the theoretical estimate. The power losses arise mainly at the waveguide mouth where the Gaussian beam is coupled to the HE11 mode, at the miter bends and in the launching system.