EAST装置上一种新型离子回旋共振加热负载耐受技术的研究

During the L-H mod transition and in the type-I ELMy plasma, the ICRH antenna load is quickly changed with fluctuation of the edge plasma parameters and leads to arcing on the transmission line and antenna, which has severely restricted the steady-state operation and high-power transmission efficiency. To achieve steady and efficient power transmission, a new real-time adjustable Conjugate-T load resilience technique, which can timely respond to fast variation of antenna load due to advantages of response speed and load compensation capability, is proposed by this project. The load variation of EAST antenna will be evaluated based on simulation and experiments. The fast ferrite tuner and real-time adjustable Conjugate-T system will be developed and adopted for physical experiment, which will fundamentally solve the problem of arcing and power loss induced by high reflection coefficient in the transmission network, and provide powerful guarantee to carry out high level ICRH research on EAST.

在L-H模转换期间以及大尺度ELMy等离子体情况下，离子回旋天线负载的快速变化容易导致传输线和天线的打火，严重制约系统的高功率稳态运行和传输效率。本项目提出的一种新型的实时可调Conjugate-T负载耐受技术，由于其响应速度和负载补偿能力上的优势使其能及时响应天线负载的快变化，实现功率的平稳、高效传输。本项目基于仿真分析与实验结合的基础上对EAST天线负载变化进行评估，完成快速铁氧体支节和实时可调Conjugate-T系统的研制并应用于物理实验。通过此项目的实施，从根本上解决传输网络中高反射系数引入的打火和功率损耗问题，为EAST上ICRH高功率稳态运行提高有力保障。

在L-H模转换期间以及大尺度ELMy等离子体情况下，离子回旋天线负载的快速变化容易导致传输线和天线的打火，严重制约系统的高功率稳态运行和传输效率。本项目提出的一种新型的实时可调Conjugate-T负载耐受技术，由于其响应速度和负载补偿能力上的优势使其能及时响应天线负载的快变化，实现功率的平稳、高效传输。本项目主要完成了复杂Conjugate-T的理论研究及台面测试、实时测控系统开发、关键部件铁氧体支节研制，并成功将并应用到了EAST上ICRH的高功率运行，完成了相关实验测试，验证本项目提出的负载耐受技术的正确性和可行性，并为下一步的推广应用指明了方向。