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Fusion Energy
This division promotes the development and timely introduction of fusion energy as a sustainable energy source with favorable economic, environmental, and safety attributes. The division cooperates with other organizations on common issues of multidisciplinary fusion science and technology, conducts professional meetings, and disseminates technical information in support of these goals. Members focus on the assessment and resolution of critical developmental issues for practical fusion energy applications.
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Albuquerque, NM|The University of New Mexico
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Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Edward F. Splitt, Won-Ho Choe
Fusion Science and Technology | Volume 18 | Number 2 | September 1990 | Pages 273-280
Technical Paper | Plasma Heating System | doi.org/10.13182/FST90-A29299
Articles are hosted by Taylor and Francis Online.
A Monte Carlo simulation is developed to model minority ion transport and fundamental-mode (n = 1) ion cyclotron resonance heating (ICRH) in asymmetric magnetic field geometries. A discrete event model is used to superimpose resonance-heated nonadiabatic changes in a test ion's magnetic moment on a Coulomb pitch angle scattering model. The ion drift orbit equations of motion are set in a magnetic flux coordinate system that separates fast motion along the field lines from slow motion across the lines. The effects of ICRH on minority ion transport are investigated for 3He in stellarator plasmas. The energy distribution functions of these radio-frequency (rf)-heated ions develop high-energy tails as a result of a preferential gain in velocity in the direction perpendicular to the ambient magnetic field. Estimates of neoclassical flux surface diffusion coefficients indicate that ion losses in an rf-heated stellarator plasma can be an order of magnitude larger than non-ICRH losses. This can be attributed to an rf-increased fraction of trapped ions, which results in increased neoclassical transport across the toroidal flux surfaces.