In discharges with internal transport barriers produced by combined NBI and ICRF heating using the hydrogen minority scheme in JET, confinement and fusion performance are strongly affected by the direction of propagation of the ICRF waves. When the waves propagate along the plasma current, the formation of an internal transport barrier is prompter and the neutron yield is up to a factor of two higher than that for propagation against the current. An ICRF induced pinch of resonating trapped ions is put forward as a candidate for explaining the observations. Simulation results are presented which show that this effect is strong enough to provide a credible explanation for the experimental results.
在JET中，利用氢少数方案结合NBI和ICRF加热产生内部输运垒的放电中，约束和聚变性能受到ICRF波传播方向的强烈影响。当波沿等离子体电流方向传播时，内部输运垒的形成更为迅速，中子产额比逆电流方向传播时高出至多两倍。提出了ICRF诱导的共振捕获离子箍缩效应作为解释这些观测结果的候选机制。所展示的模拟结果表明，该效应足够强，能够为实验结果提供可信的解释。