%0 Journal Article %1 fujita.2001 %A Fujita, T. %A Oikawa, T. %A Suzuki, T. %A Ide, S. %A Sakamoto, Y. %A Koide, Y. %A Hatae, T. %A Naito, O. %A Isayama, A. %A Hayashi, N. %A Shirai, H. %D 2001 %I American Physical Society %J Phys. Rev. Lett. %K efit i-mhd tokamak JT-60U current_hole current_reversal equilibrium %N 24 %P 245001 %R 10.1103/PhysRevLett.87.245001 %T Plasma Equilibrium and Confinement in a Tokamak with Nearly Zero Central Current Density in JT-60U %U http://link.aps.org/doi/10.1103/PhysRevLett.87.245001 %V 87 %X A high confinement equilibrium with nearly zero toroidal current in the central region (a ``current hole'') has been observed for the first time to persist stably for several seconds in the JT-60U tokamak. This observation indicates the possibility of stable tokamak operation without central toroidal current; the central current has previously been believed to be necessary in tokamaks. The radius of the current hole extended up to 40\% of the plasma minor radius. It was observed that the current hole was formed by the increase of the off-axis noninductive current.

@article{fujita.2001, abstract = {A high confinement equilibrium with nearly zero toroidal current in the central region (a ``current hole'') has been observed for the first time to persist stably for several seconds in the JT-60U tokamak. This observation indicates the possibility of stable tokamak operation without central toroidal current; the central current has previously been believed to be necessary in tokamaks. The radius of the current hole extended up to 40\% of the plasma minor radius. It was observed that the current hole was formed by the increase of the off-axis noninductive current.}, added-at = {2009-03-19T11:51:51.000+0100}, author = {Fujita, T. and Oikawa, T. and Suzuki, T. and Ide, S. and Sakamoto, Y. and Koide, Y. and Hatae, T. and Naito, O. and Isayama, A. and Hayashi, N. and Shirai, H.}, biburl = {https://www.bibsonomy.org/bibtex/2a25603ebbedd1140e34cc2c2d7e6fdc0/prodrigues}, description = {Observation of a current-hole at JT-60U with a mild S signature.}, doi = {10.1103/PhysRevLett.87.245001}, interhash = {8cb10ad597290091ba61e4fc279dcff4}, intrahash = {a25603ebbedd1140e34cc2c2d7e6fdc0}, journal = {Phys. Rev. Lett.}, keywords = {efit i-mhd tokamak JT-60U current_hole current_reversal equilibrium}, month = Nov, number = 24, numpages = {4}, pages = 245001, publisher = {American Physical Society}, timestamp = {2009-03-19T11:51:51.000+0100}, title = {Plasma Equilibrium and Confinement in a Tokamak with Nearly Zero Central Current Density in JT-60U}, url = {http://link.aps.org/doi/10.1103/PhysRevLett.87.245001}, volume = 87, year = 2001 }