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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.”
E.A. Chaniotakis, J.P. Freidberg, D.R. Cohn
Fusion Science and Technology | Volume 19 | Number 3 | May 1991 | Pages 1168-1176
Ignition Device | doi.org/10.13182/FST91-A29501
Articles are hosted by Taylor and Francis Online.
In this paper we write the 0-D energy balance in terms of the parameters , and . The minimum value of W required to achieve ohmic ignition (i.e. II = 0) in the generic case (i.e. no n or T dependance on τ), and for various dependencies of τ on n and T is W ∼ 15 in all cases. Also the value of W below which no access, even with the aid of auxiliary power, to high temperature alpha dominated operation is possible is W ∼ 2 in all cases. Optimized designs are obtained by minimizing the ratio of the auxiliary power pa to the ohmic power pΩ at the Cordey pass. The optimization is consistent with the physics requirements, the toroidal field coil volume and stress constraints, and with the volt-second and stress constraints of the ohmic transformer. Results under various τ dependencies are presented.