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April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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Fusion Science and Technology
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.”
A. V. Melnikov, C. Hidalgo, A. A. Chmyga, N. B. Dreval, L. G. Eliseev, S. M. Khrebtov, A. D. Komarov, A. S. Kozachok, L. I. Krupnik, I. Pastor, M. A. Pedrosa, S. V. Perfilov, K. McCarthy, M. A. Ochando, G. Van Oost, C. Silva, B. Goncalves, Yu. N. Dnestrovskij, S. E. Lysenko, M. V. Ufimtsev, V. I. Tereshin
Fusion Science and Technology | Volume 46 | Number 2 | September 2004 | Pages 299-311
Technical Papers | Stellarators | doi.org/10.13182/FST04-A568
Articles are hosted by Taylor and Francis Online.
The effect of edge biasing on plasma potential was investigated in the TJ-II stellarator and the T-10 tokamak. The Heavy Ion Beam Probe (HIBP) diagnostic, a unique tool for studying the core potential directly, was used in both machines. Experiments in TJ-II show that it is possible to modify the global confinement and edge plasma parameters with limiter biasing, illustrating the direct impact of radial electric fields on TJ-II confinement properties. For the first time it was shown that the plasma column in a stellarator can be charged as a whole for a hot, near-reactor-relevant plasma. The plasma potential and electric fields evolve on two different characteristic time scales. Although the experimental conditions in the two machines have many important differences, the basic features of plasma potential behavior have some similarities: The potential response has the same polarity and scale as the biasing voltage, and the fluctuations are suppressed near the electrode/limiter region. However, whereas both edge and core plasma potential are affected by biasing in TJ-II, the potential changes mainly near the biased electrode in T-10.