Development of RF Window for 3.7-GHz LHCD System on HL-2A

作者：Wang, C.^*; Lu, B.; Liang, J.; Zeng, H.; Bai, X. Y.; Chen, Y. L.; Huang, M.

来源：Fusion Science and Technology, 2018, 73(4): 539-544.

DOI：10.1080/15361055.2017.1396149

• lower
• hybrid current drive
• radio-frequency window
• sapphire

A pillbox-type radio-frequency window for lower-hybrid current drive power transmission of 3.7 GHz for 200 kW/2 s is designed. The relative permittivity and the loss tangent of several domestic materials-alumina, boron nitride, and sapphire-are exactly compared by the rectangular cavity perturbation method, and finally, the sapphire is chosen as the window medium. The reflection coefficient of the optimized window can reach 55-dB at 3.7 GHz simulated by high-frequency simulation software, and the peak temperature rise can be limited at 20 degrees C with maximum thermal stress of 1.7 MPa by thermal and mechanical analysis. In the high-power test, 221 kW/3 s energy passes the welded

• 出版日期2018
• 单位核工业西南物理研究院