High Power RF Transmitters for ICRF Applications on EAST
High Power RF Transmitters for ICRF Applications on EAST
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DOI：
10.1088/1009-0630/15/3/14
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发表时间：
2013-03
影响因子：
1.7
通讯作者：
Y. Mao 毛;S. Yuan 袁;Y. Zhao 赵;X. Zhang 张;G. Chen 陈;Y. Cheng 程;L. Wang 王;S. Ju 琚;X. Deng 邓;C. Qin 秦;L. Yang 杨;R. Kumazawa
中科院分区：
文献类型：
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作者：
Y. Mao 毛;S. Yuan 袁;Y. Zhao 赵;X. Zhang 张;G. Chen 陈;Y. Cheng 程;L. Wang 王;S. Ju 琚;X. Deng 邓;C. Qin 秦;L. Yang 杨;R. Kumazawa
为实验先进超导托卡马克装置（EAST）研制了一套射频功率为4 × 1.5MW的离子回旋频率范围（ICRF）系统。高射频功率发射机是作为ICRF系统研究和开发的一部分而设计的，该系统在25 MHz至70 MHz的频率范围内具有兆瓦级的长脉冲操作。本文对大功率发射机的以下部分进行了研究：由5 kW宽带固态放大器、100 kW四极管驱动级放大器和1.5MW四极管末级放大器组成的三级大功率放大器，以及直流高压电源。基于工程设计和静态检查，使用匹配的假负载对RF发射机进行了测试，其中实现了1.5 MW的RF输出功率。发射机在初级阶段提供6兆瓦的射频功率，在后期升级后将达到12兆瓦的水平。发射机在EAST和HT-7装置上成功地稳定运行。在2010年秋季活动期间，在EAST ICRF加热实验中向等离子体注入了高达1.8 MW的RF功率，等离子体性能大大改善。
An Ion Cyclotron Range of Frequency (ICRF) system with a radio frequency (RF) power of 4 × 1.5 MW was developed for the Experimental Advanced Superconducting Tokamak (EAST). High RF power transmitters were designed as a part of the research and development (R&D) for an ICRF system with long pulse operation at megawatt levels in a frequency range of 25 MHz to 70 MHz. Studies presented in this paper cover the following parts of the high power transmitter: the three staged high power amplifier, which is composed of a 5 kW wideband solid state amplifier, a 100 kW tetrode drive stage amplifier and a 1.5 MW tetrode final stage amplifier, and the DC high voltage power supply (HVPS). Based on engineering design and static examinations, the RF transmitters were tested using a matched dummy load where an RF output power of 1.5 MW was achieved. The transmitters provide 6 MW RF power in primary phase and will reach a level up to 12 MW after a later upgrade. The transmitters performed successfully in stable operations in EAST and HT-7 devices. Up to 1.8 MW of RF power was injected into plasmas in EAST ICRF heating experiments during the 2010 autumn campaign and plasma performance was greatly improved.