Modelling of microwave heating and current drive at STEP

STEP 中的微波加热和电流驱动建模

• 批准号: 2597536
• 金额: --
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2597536
• 关键词: Modelling; microwave; heating; current; drive

To effectively drive plasma current non-inductively and support steady-state operation in future fusion power generation systems, the use of a combination of mechanisms, specifically Electron Cyclotron Current Drive (ECCD) and the excitation of Electron Bernstein Waves (EBW), are highly desirable. The application of these process may be separate i.e. for low density plasmas ECCD can be preferable while EBW-CD can be used for high density plasma. There are also regimes when plasma conditions are such that both mechanisms can be simultaneously employed. One of the aims of the project will be to carry out studies to derive and understand the criteria for switching the heating mechanisms i.e. from ECCD to EBW-CD or employing both simultaneously. The evolution of the plasma in time also evokes the possibility of varying the RF frequencies and the launch direction of the RF beams and modulation of the power used to drive the currents. The criteria which dictate the changing of the RF beams: frequencies, powers, directions will be also considered to provide the roadmap to maintain stable and continuous operation. The stability of the chosen parameters in regards with small variations of plasma parameters for given equilibria should be also analysed. Although the studies will be carried out from general perspectives, the specific STEP design which takes into consideration specific STEP engineering requirements, will be considered during the project and used as a driver for the parameter optimisations.The project will be based on analytical and numerical studies using a set of codes like GENRAY, CQL3D and JETTO. UKAEA are also developing in-house codes which will be used to provide benchmarking of CQL3D and GENRAY.

为了有效地非感应地驱动等离子体电流并支持未来聚变发电系统中的稳态操作，非常期望使用机制的组合，特别是电子回旋电流驱动（ECCD）和电子伯恩斯坦波（EBW）的激发。这些工艺的应用可以是分开的，即对于低密度等离子体，ECCD可以是优选的，而EBW-CD可以用于高密度等离子体。还存在当等离子体条件使得两种机制可以同时采用时的方案。该项目的目标之一是开展研究，以得出和理解转换加热机制的标准，即从幼儿保育和发展转换到胚后水-幼儿保育和发展，或同时使用两者。等离子体在时间上的演变还引起改变RF频率和RF束的发射方向以及用于驱动电流的功率的调制的可能性。还将考虑决定RF波束变化的标准：频率、功率、方向，以提供路线图，从而保持稳定和连续的操作。还应分析所选参数在给定平衡的等离子体参数的微小变化方面的稳定性。虽然研究将从一般的角度进行，考虑到具体的STEP工程要求，具体的STEP设计将在项目期间考虑，并用作参数优化的驱动程序。该项目将基于分析和数值研究，使用一套代码，如GENRAY，CQL 3D和JETTO。UKAEA还在开发内部代码，用于提供CQL 3D和GENRAY的基准。