MAST Upgrade Divertor Facility: A Test Bed for Novel Divertor Solutions
MAST Upgrade Divertor Facility: A Test Bed for Novel Divertor Solutions
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MAST 升级偏滤器设施：新型偏滤器解决方案的试验台
DOI：
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发表时间：
2018
影响因子：
1.5
通讯作者：
N. Walkden
中科院分区：
文献类型：
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作者：
W. Morris;J. Harrison;A. Kirk;B. Lipschultz;F. Militello;D. Moulton;N. Walkden
集成排气的挑战与演示和电厂级托卡马克（类似iter和替代演示，聚变核科学设施方法）的其他要求是众所周知的，排气解决方案可能是设计和操作方案选择的基础。已经提出了诸如高主等离子体辐射等战略，但正在寻求改进的解决办法，并将需要修订研究方法。虽然没有任何设备可以解决所有的挑战，但新的MAST升级托卡马克可以在单个设备中探索广泛的转流等离子体方面及其与核心等离子体的关系（例如，进入h模式），特别是基本理解和新思想的发展。它具有独特的封闭式转向器组合，从常规到长腿（包括Super-X）的各种配置能力，以及完全对称的双零（等离子体和转向器结构）。在DEMO和电厂规模的设备中，提前进行全面集成测试是不可行的，但不同的物理机制可能占主导地位，为了推断这些设备，基于理论的模型可能对可靠的性能预测、优化和概念的“资格”至关重要。这些模型的开发和验证是MAST升级项目的核心。在许多有待探索的领域中，将重点关注等离子体分离和跨场传输机制（例如，等离子体细丝）的密切耦合主题，这是在DEMO规模上有效可靠地保护等离子体面向组件的关键成分。
The challenge of integrated exhaust consistent with the other requirements in DEMO and power plant class tokamaks (ITER-like and alternative DEMOs, Fusion Nuclear Science Facility approaches) is well-known and the exhaust solution is likely to be fundamental to the design and operating scenarios chosen. Strategies have been proposed such as high main plasma radiation, but improved solutions are sought and will require revised research methodologies. While no facility can address all the challenges, the new MAST Upgrade tokamak enables exploration of a wide range of divertor plasma aspects in a single device and their relation with the core plasma (e.g., access to H-mode) and in particular the development of fundamental understanding and new ideas. It has a unique combination of closed divertor, capability of a wide range of configurations from conventional to long leg (including Super-X), and fully symmetric double null (plasma and divertor structures). To extrapolate to DEMO and power plant scale devices where full integrated tests in advance are not feasible yet different physics mechanisms may dominate, theory-based models are likely to be essential for confident performance prediction, optimization, and a “qualification” of the concept. Development and validation of such models is at the heart of the program around MAST Upgrade. Amongst the many areas to be explored, there will be a strong focus on the closely coupled topics of plasma detachment and cross-field transport mechanisms (e.g., plasma filaments), key ingredients of effective and reliable protection of the plasma-facing components at DEMO scale.