Frassinetti L, Predebon I, Koguchi H, Yagi Y, Hirano Y, Sakakita H, Spizzo G, White R B
National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan.
Phys Rev Lett. 2006 Oct 27;97(17):175001. doi: 10.1103/PhysRevLett.97.175001. Epub 2006 Oct 24.
The quasi-single-helicity (QSH) state of a reversed-field pinch (RFP) plasma is a regime in which the RFP configuration can be sustained by a dynamo produced mainly by a single tearing mode and in which a helical structure with well-defined magnetic flux surfaces arises. In this Letter, we show that spontaneous transitions to the QSH regime enhance the particle confinement. This improvement is originated by the simultaneous and cooperative action of the increase of the magnetic island and the reduction of the magnetic stochasticity.
反向场箍缩（RFP）等离子体的准单螺旋度（QSH）状态是一种状态，在该状态下，RFP构型可由主要由单一撕裂模产生的发电机维持，并且会出现具有明确磁通面的螺旋结构。在本快报中，我们表明向QSH状态的自发转变增强了粒子约束。这种改善源于磁岛增加和磁随机性降低的同时协同作用。
