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首页> 外文期刊>Plasma physics and controlled fusion >Scaling of the frequencies of the type one edge localized modes and their effect on the tungsten source in JET ITER-like wall
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Scaling of the frequencies of the type one edge localized modes and their effect on the tungsten source in JET ITER-like wall

机译：类JET ITER壁中一边缘局域模的频率缩放及其对钨源的影响

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摘要

A database of 250 pulses taken randomly during the experimental campaigns of JET with the ITER-like wall (ILW) is used to study the frequency dependences of the type I edge localized modes (ELM). A scaling of the ELM frequency is presented as a function of the pedestal density drop dN(ped) and a very simple model to interpret this scaling is discussed. In this model, the frequency of the ELMs is governed by the time needed by the neutral flux to refill the density of the pedestal. The filling rate is the result of a small imbalance between the neutral flux filling the pedestal and the outward flux that expels the particles to the SOL. The ELM frequency can be governed by such a mechanism if the recovery time of the temperature of the pedestal in JET occurs before or at the same time as the one of the density. This is observed to be the case. An effect of the fuelling is measured when the number of injected particles is less than 1 x 10(22) particles s(-1). In that case an increase of the inter-ELM time is observed which is related to the slower recovery of the density pedestal.
机译：在JET的实验活动中，使用ITER样壁（ILW）随机采集250个脉冲的数据库，用于研究I型边缘局部模式（ELM）的频率依赖性。 ELM频率的缩放比例是作为基座密度下降dN（ped）的函数给出的，并讨论了一个非常简单的模型来解释该缩放比例。在此模型中，ELM的频率由中性磁通重新填充基座密度所需的时间控制。填充速率是填充基座的中性通量与将颗粒排出到SOL的向外通量之间小的不平衡的结果。如果JET中基座温度的恢复时间在密度之一之前或同时发生，则可以通过这种机制来控制ELM频率。观察到确实如此。当喷射的粒子数小于1 x 10（22）粒子s（-1）时，测量加油效果。在那种情况下，观察到ELM间时间增加，这与密度基座的恢复较慢有关。

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