20 years of ECRH at W7-A and W7-AS
20 years of ECRH at W7-A and W7-AS
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DOI：
10.1088/0029-5515/43/11/003
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发表时间：
2003-11
期刊：
影响因子：
3.3
通讯作者：
V. Erckmann;H. Laqua;H. Maassberg;N. Marushchenko;W. Kasparek;G. Müller
中科院分区：
文献类型：
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作者：
V. Erckmann;H. Laqua;H. Maassberg;N. Marushchenko;W. Kasparek;G. Müller
高功率ECRH的基础研究始于20年前的IPP，在W7-A星光仪上使用28 GHz、200千瓦、持续40毫秒的脉冲。这些先导实验引发了对局部加热和电流驱动独特能力的强烈探索活动。物理学的成就与源和传输线技术的进步密切相关。以W7-A和W7-AS为例，回顾了ECRH的性能和通用性；后者于2002年7月31日关闭。讨论了这些里程碑式的成就。研究了标准加热方案，如O-模式和X-模式，以及高级方案，如在不同谐波下通过O-X-B过程的模式转换加热，并给出了选定的结果。首次报道了由伯恩斯坦波驱动电流的实验。讨论了波与特定于星体的囚禁粒子群相互作用的物理过程。W7-A和W7-AS的结果为W7-X的10兆瓦连续ECRH系统奠定了实验和技术基础，旨在证明星体探测器的固有稳态能力。
Basic research on high-power ECRH started 20 years ago at IPP using 28 GHz pulses with 200 kW for 40 ms at the W7-A stellarator. These pilot experiments triggered a strong activity of exploration of the unique capabilities of localized heating and current drive. The achievements in physics were strongly linked with progress in source and transmission line technology. The capability and versatility of ECRH are reviewed using W7-A and W7-AS as example experiments; the latter was shut down on July 31, 2002. The milestone achievements are discussed. Standard heating scenarios such as O-mode and X-mode as well as advanced scenarios like mode-conversion heating via the O–X–B process at different harmonics were investigated and selected results are presented. First experiments with current drive by Bernstein-waves are reported. The physics of wave interaction with stellarator-specific trapped particle populations is discussed. The results from W7-A and W7-AS establish the experimental and technological bases for the 10 MW, CW ECRH system at W7-X, which aims to demonstrate the inherent steady-state capability of stellarators.