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Shallow pellet fuelling under conditions of RMP ELM mitigation or divertor detachment in ASDEX Upgrade

机译:在Asdex升级的RMP ELM缓解或VEREDOR脱离的条件下,浅层颗粒燃料

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Introduction In ITER, injection of hydrogen isotope pellets will be the main plasma density control tool. The pellets will be injected from the high field side to maximise the deposition depth, which will be still relatively shallow. This plasma periphery is subject to ELM control and divertor detachment control and therefore the interaction of pellet fuelling with these loops might be expected. This paper presents the results of such experiments in ASDEX Upgrade where pellets are used [1] to control plasma density under conditions of ELM control or divertor detachment. In these experiments direct fuelling by gas is negligible to mimic the ITER fuelling condition in the plasma core. The relative pellet size and pellet deposition are aimed to approach those in ITER. ELMs are controlled by n=2 Resonant Magnetic Perturbations (RMPs) in feed forward mode [2]. Divertor detachment is feedback controlled on the target temperature using nitrogen injection in the divertor.
机译:引入在ITER中,注射氢同位素颗粒将是主等离子体密度控制工具。颗粒将从高场侧注入以最大化沉积深度,这仍然相对较浅。该等离子体周边受ELM控制和VERECTOR脱离控制的影响,因此可能预期用这些环的颗粒加油的相互作用。本文介绍了ASDEX升级中的这种实验的结果,其中使用颗粒[1]以控制在ELM控制或倾斜器脱离的条件下的等离子体密度。在这些实验中,通过气体直接燃料可以忽略不计,以模仿等离子体芯中的浸泡液体燃料条件。相对颗粒尺寸和颗粒沉积旨在接近浸渍剂。 ELMS由馈线前进模式[2]中的n = 2谐振磁扰动(RMP)控制。使用氮气剂在目标温度上对目标温度进行反馈控制的反馈。

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