Commissioning and Operation Results of 110 Ghz Ech System in Kstar
Commissioning and Operation Results of 110 Ghz Ech System in Kstar
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DOI：
10.1142/9789814340274_0006
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发表时间：
2011-02
期刊：
影响因子：
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通讯作者：
M. Joung;Won-Soon Han;Jong-Su Kim;Y. Bae;H. Yang;Seungil Park;H. Do;W. Namkung;M. Cho;Y. Gorelov;J. Lohr;J. Doane
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文献类型：
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作者：
M. Joung;Won-Soon Han;Jong-Su Kim;Y. Bae;H. Yang;Seungil Park;H. Do;W. Namkung;M. Cho;Y. Gorelov;J. Lohr;J. Doane
一个110 GHz的GYCOM回旋管，这是从DIII-D在通用原子公司（GA），包括匹配光学单元（MOU）和磁铁，被成功地委托，并用于二次谐波ECH辅助启动在2009年韩国超导托卡马克先进研究（KSTAR）活动。在安装过程中，通过调整磁体顶部和底部凸缘上的对准器，将回旋管对准在磁体的磁场轴上。使用烧纸在窗口处的输出光束轮廓的测量图像显示出与DIII-D中测量的那些良好的一致性。最大可用射频功率仅为约250 kW，这是在终端虚拟负载处测得的，这是由于现有电源的限制，其标称射束电压和电流分别为63 kV和20 A。110 GHz，250 kW的EC波，这对应于二次谐波谐振波的环形场的2 T，被注入到KSTAR的等离子体启动和电流斜升。通过二次谐波ECH预电离成功可靠地实现了等离子体的启动。注入模式是X模式，具有与环形磁场的倾斜发射角。本文报道了110 GHz ECH系统的初步调试和运行结果。此外，在2009年KSTAR活动的ECH辅助启动的实验结果进行了介绍和讨论。
A 110 GHz GYCOM gyrotron, which was loaned from DIII-D in General Atomics (GA) including a matching optics unit (MOU) and a magnet, was successfully commissioned and used for the second harmonic ECH-assisted startup in 2009 Korea Superconducting Tokamak Advanced Research (KSTAR) campaign. The gyrotron was aligned at the magnetic field axis of the magnet by adjusting aligners on top and bottom flanges of the magnet during the installation procedures. The measured images of the output beam profile at the window using a burn paper showed a good agreement with those measured in DIII-D. The maximum available RF power was just about 250 kW, which was measured at the terminal dummy load, due to the limitation of the existing power supply of which nominal beam voltage and current were 63 kV and 20 A, respectively. The 110 GHz, 250 kW EC wave, which corresponds to the second harmonic resonance wave to the toroidal field of 2 T, was injected to KSTAR for the plasma start-up and current ramp-up. The plasma start-up was successfully and reliably achieved through the second harmonic ECH pre-ionization. The injection mode was the X-mode with oblique launch angle to the toroidal magnetic field. This paper reports the initial commissioning and operation results of the 110 GHz ECH system. Moreover, the experimental results of the ECH-assisted start-up during the 2009 KSTAR campaign are presented and discussed.