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Fusion Science and Technology
Latest News
Japan gets new U for enrichment as global power and fuel plans grow
President Trump is in Japan today, with a visit with new Prime Minister Sanae Takaichi on the agenda. Takaichi, who took office just last week as Japan’s first female prime minister, has already spoken in favor of nuclear energy and of accelerating the restart of Japan’s long-shuttered power reactors, as Reuters and others have reported. Much of the uranium to power those reactors will be enriched at Japan’s lone enrichment facility—part of Japan Nuclear Fuel Ltd.’s Rokkasho fuel complex—which accepted its first delivery of fresh uranium hexafluoride (UF₆) in 11 years earlier this month.
T. Estrada, D. López-Bruna, A. Alonso, E. Ascasíbar, A. Baciero, A. Cappa, F. Castejón, A. Fernández, J. Herranz, C. Hidalgo, J. L. De Pablos, I. Pastor, E. Sánchez, J. Sánchez, L. Krupnik, A. A. Chmyga, N. Dreval, S. M. Khrebtov, A. D. Komarov, A. S. Kozachok, V. Tereshin, A. V. Melnikov, L. Eliseev
Fusion Science and Technology | Volume 50 | Number 2 | August 2006 | Pages 127-135
Technical Paper | Stellarators | doi.org/10.13182/FST06-A1228
Articles are hosted by Taylor and Francis Online.
In most helical systems, electron-internal transport barriers (e-ITBs) are observed in electron cyclotron heated (ECH) plasmas with high heating power density. In the stellarator TJ-II, e-ITBs are easily achievable by positioning a low-order rational surface close to the plasma core because this increases the density range in which the e-ITB can form. Experiments with different low-order rationals show a dependence of the threshold density and barrier quality on the order of the rational (3/2, 4/2, 5/3 . . .). In addition, quasi-coherent modes are frequently observed before and/or after the e-ITB phenomenon at the radial location of the transport barrier foot. Such modes vanish as the barrier is fully developed.
