Enhancements to MAST Upgrade to address the EUROfusion Plasma Exhaust Strategy
Enhancements to MAST Upgrade to address the EUROfusion Plasma Exhaust Strategy
复制标题
增强 MAST 升级以解决 EUROfusion 等离子排放策略
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
N. Walkden
中科院分区：
文献类型：
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作者：
J. Harrison;D. Moulton;M. Carr;I. Chapman;D. Keeling;A. Kirk;N. Walkden
提出了MAST升级的一揽子增强措施，以解决EUROfusion等离子体排气策略中概述的DEMO设备开发所面临的关键问题。MAST升级[1]被设计成一个高度灵活的设施，能够在更高的环向场（0.5→0.8T）、更高的等离子体电流（1→ 2 MA）、更长的脉冲持续时间（0.7→5s）和专用的封闭偏滤器室中运行，以探索Super-X偏滤器配置[2]。早期的MAST升级操作将在与原始MAST设备相似的NBI加热和粒子泵送水平下进行。这些改进包括将中性束（NBI）加热功率从5兆瓦增加到10兆瓦，为现有偏滤器低温泵提供低温装置，颗粒注入器和改进的气体燃料，扩展的诊断套件和升级的实时控制系统。这些升级将允许在高加热功率下评估备选偏滤器构型在减少偏滤器热量和粒子载荷以及对外部控制的敏感性方面的相对优点。此外，这些改进将有助于详细研究脱离物理和运输的SOL和偏滤器。
A package of enhancements to MAST Upgrade is proposed to address key issues facing the development of a DEMO device outlined in the EUROfusion plasma exhaust strategy. MAST Upgrade [1] is designed to be a highly flexible facility, capable of operating at higher toroidal field (0.5→0.8T), higher plasma current (1→2MA), longer pulse duration (0.7→5s) and purpose-built closed divertor chambers to explore the Super-X divertor configuration [2]. Early MAST Upgrade operations will be carried out at similar levels of NBI heating and particle pumping as the original MAST device. The enhancements include doubling the neutral beam (NBI) heating power from 5 to 10MW, a cryoplant to feed existing divertor cryopumps, a pellet injector and improved gas fuelling, an expanded suite of diagnostics and an upgraded real-time control system. These upgrades will allow the relative merits of alternative divertor configurations to be assessed at high heating power, in terms of reduction of divertor heat and particle loads, and sensitivity to external control. Furthermore, these enhancements will facilitate detailed studies of detachment physics and transport in the SOL and divertor.