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首页> 外文期刊>Plasma physics and controlled fusion >Comparison of L-mode regimes with enhanced confinement by impurity seeding in JET and DIII-D
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Comparison of L-mode regimes with enhanced confinement by impurity seeding in JET and DIII-D

机译：在JET和DIII-D中通过杂质注入增强约束的L模式方案的比较

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Impurity seeding in both the Joint European Torus (JET) and DIII-D tokamaks has produced L-mode discharges with confinement enhancements comparable to H-mode and a near doubling of the core ion temperature when compared,to similar unseeded discharges. Although Z(eff) increases with the neon injection, the total neutron rate is as high, or higher, than reference discharges and the calculated thermal neutron rate increases dramatically in both devices. Modelling with the gyrokinetic simulation code shows a reduction in low k turbulence growth rates with neon injection decreasing to less than the E x B shearing rate, consistent with stabilization of ion temperature gradient modes in both JET and DIII-D. Reductions in ion thermal diffusivity are also observed with impurity seeding. Neoclassical m = 3/2 tearing modes limit the duration of best performance in DIII-D with neon injection, while n = 1 and n = 2 magnetohydrodynamic modes limit the performance in JET. [References: 11]
机译：联合欧洲环面（JET）和DIII-D托卡马克中的杂质播种产生了L型放电，与类似的非播种放电相比，其密闭性增强与H型相当，并且核心离子温度几乎翻了一番。尽管Z（eff）随氖气注入而增加，但总中子速率与参考放电一样高或更高，并且两种设备中计算出的热中子速率均显着增加。带有陀螺动力学模拟代码的模型表明，低k湍流的增长率降低了，而氖气的注入降低到小于E x B的剪切速率，这与JET和DIII-D中离子温度梯度模式的稳定相一致。杂质注入也可以观察到离子热扩散率的降低。新古典的m / n = 3/2撕裂模式限制了DIII-D氖气注入中最佳性能的持续时间，而n = 1和n = 2磁流体动力学模式限制了JET中的性能。 [参考：11]

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