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首页> 外文期刊>Plasma physics and controlled fusion >Overview of experiments with radiation cooling at high confinement and high density in limited and diverted discharges
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Overview of experiments with radiation cooling at high confinement and high density in limited and diverted discharges

机译：在受限和分流放电中以高密闭度和高密度进行辐射冷却的实验概述

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摘要

An overview is presented of recent experiments with radiating mantles on limiter and divertor machines, realizing simultaneously high confinement and high density at high-radiation levels. A variety of operational regimes has been observed and the characteristics of each are documented. High-performance plasmas (i.e. edge localized mode (ELM)-free H-mode confinement quality f(H93) greater than or equal to 1 and normalized beta values beta(n) greater than or equal to 2 simultaneously) with radiating mantles have been demonstrated under quasistationary conditions during the maximum flattop time of the machine (equal to tens of confinement times) on DIII-D and TEXTOR-94. Maximum values for beta(n) up to 4 and for the advanced tokamak confinement-stability product beta(n) x f(L89) up to 13, have been obtained in very high confinement mode (VH-mode) like discharges with radiating mantles in DIII-D. There is a striking similarity between improved ohmic confinement discharges (with or without Ne seeding) and radiating mantle discharges, indicating a possible common origin for the confinement improvement observed. Possible scenarios for the application of radiating mantles on larger machines such as JET and JT-60U are indicated. [References: 36]
机译：概述了最近在限制器和分流器机器上辐射地幔的实验，同时在高辐射水平下实现了高限制和高密度。已经观察到各种操作方式，并记录了每种操作方式的特征。具有辐射罩的高性能等离子体（即无边缘局部模式（ELM）的H模式限制质量f（H93）同时大于或等于1且归一化的beta值beta（n）同时大于或等于2）在DIII-D和TEXTOR-94的机器的最大平顶时间（等于数十个限制时间）的准静态条件下进行了演示。在非常高的限制模式（VH模式）下（例如带有辐射地幔的放电），获得了高达4的beta（n）和高达13的高级托卡马克限制稳定性产品beta（n）xf（L89）的最大值。 DIII-D。改进的欧姆约束放电（有或没有Ne晶种）与辐射地幔放电之间有惊人的相似之处，这表明观察到的约束改进可能是共同的。指出了在JET和JT-60U等大型机器上应用辐射罩的可能方案。 [参考：36]

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