Fujita T, Ide S, Kamada Y, Suzuki T, Oikawa T, Takeji S, Sakamoto Y, Koide Y, Isayama A, Hatae T, Kubo H, Higashijima S, Naito O, Shirai H, Fukuda T
Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-machi, Ibaraki-ken, Japan.
Phys Rev Lett. 2001 Aug 20;87(8):085001. doi: 10.1103/PhysRevLett.87.085001. Epub 2001 Jul 31.
A quasisteady reversed shear plasma with a large bootstrap current fraction ( approximately 80%) has been obtained for the first time in the JT-60U tokamak. The shrinkage of reversed shear region was suppressed by the bootstrap current peaked at the internal transport barrier (ITB) layer and the ITBs at a large radius were sustained, which, by combination with an H-mode edge pedestal, resulted in a high confinement or 2.2 times the H-mode scaling for 6 times energy confinement time or 2.7 s. Furthermore, a full noninductive current drive was obtained by the bootstrap current and the beam driven current.
在JT-60U托卡马克装置中首次获得了自举电流份额较大（约80%）的准稳态反磁剪切等离子体。内部输运垒（ITB）层处峰值自举电流抑制了反磁剪切区域的收缩，大半径处的ITB得以维持，这与H模边缘台相结合，实现了高约束，能量约束时间达到H模标度的2.2倍，即6倍于H模标度，为2.7秒。此外，通过自举电流和束流驱动电流实现了完全非感应电流驱动。
