Pre-Stub Tuner for Reduction of Radio-Frequency Voltage Along Transmission Line in EAST-ICRF System
Pre-Stub Tuner for Reduction of Radio-Frequency Voltage Along Transmission Line in EAST-ICRF System
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用于降低 EAST-ICRF 系统中传输线射频电压的预短节调谐器
DOI：
10.13182/fst15-214
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发表时间：
2017-02
影响因子：
0.9
通讯作者：
YuZhou MAO
中科院分区：
文献类型：
--
作者：
Gen Chen;YuZhou MAO
实验先进超导托卡马克（EAST）的离子回旋频率范围（ICRF）加热系统的特点是高射频（RF）功率高达12 MW和宽频率范围超过25至70 MHz。由液体阻抗匹配装置、陶瓷馈通、倍频器和具有四个带的ICRF加热天线组成的高RF功率传输系统已经运行了一些年。在高功率ICRF实验中，需要解决的一个问题是ICRF天线和阻抗匹配设备之间的同轴传输线上的高RF电压，这是由与传输线的特性阻抗相比低的天线负载电阻引起的。采用短截线调谐器来降低EAST ICRF功率传输系统中的RF电压。详细介绍了采用短路和开路短截线调谐器降低射频电压的两种方法。分析计算了短截线调谐器的最佳位置和长度，以实现传输线上较小的电压降低比（VRR）。采用短截线调谐器降低传输线射频电压的实验结果表明，该器件的射频VRR达到了1.057。传输线上的射频电压显著降低，传输功率的能力明显提高。由同轴传输线的导体的表面电阻引起的欧姆损耗也被减小，并且在高RF功率操作下传输线内的击穿概率被减小。
The ion cyclotron range of frequency (ICRF) heating system of the Experimental Advanced Superconducting Tokamak (EAST) is characterized by high radio-frequency (RF) power up to 12 MW and wide frequency range over 25 to 70 MHz. A high RF power transmission system composed of a liquid impedance matching device, ceramic feedthrough, decoupler, and ICRF heating antenna with four straps has been in operation for some years. In a high-power ICRF experiment, one issue that needs to be solved is the high RF voltage on the coaxial transmission line between the ICRF antenna and the impedance matching device, which is caused by low antenna loading resistance compared to the characteristic impedance of the transmission line. A stub tuner is employed to reduce the RF voltage in the EAST ICRF power transmission system. Two methods to reduce RF voltage using short-circuited and open-circuited stub tuners are introduced in detail. The optimized position and length of the stub tuner are analyzed and calculated to achieve a smaller voltage reduction ratio (VRR) on the transmission line. The test with the stub tuner to reduce the RF voltage of the transmission line is carried out, and a RF VRR of ∼0.57 is achieved. The RF voltage on the transmission line is significantly reduced, and the capability of the transmission power is obviously improved. Ohmic losses caused by the surface resistance of the conductor of the coaxial transmission line are also decreased, and the probability of breakdown within the transmission line is reduced under high RF power operation.
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DOI：
--
发表时间：
2013
影响因子：
1.3
作者：
Qin Chengming
通讯作者：
Qin Chengming
影响因子：
1.7
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
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
影响因子：
1.7
作者：
Qingxi Yang;Yuntao Song;Songtao Wu;Yan-ping Zhao
通讯作者：
Qingxi Yang;Yuntao Song;Songtao Wu;Yan-ping Zhao
DOI：
10.13182/fst11-203-234
发表时间：
1987
期刊：
Fusion Technology
影响因子：
--
作者：
A. Kaye;J. Jacquinot;P. Lallia;T. Wade
通讯作者：
A. Kaye;J. Jacquinot;P. Lallia;T. Wade
影响因子：
1.7
作者：
P. Lamalle;B. Beaumont;F. Kazarian;T. Gassmann;G. Agarici;P. Ajesh;T. Alonzo;B. Arambhadiya;A. Argouarch;R. Bamber;G. Berger-by;J. Bernard;C. Brun;S. Carpentier;F. Clairet;L. Colas;X. Courtois;A. Davis;C. Dechelle;L. Doceul;P. Dumortier;F. Durodié;F. Ferlay;M. Firdaouss;E. Fredd;J. Giacalone;R. Goulding;N. Greenough;D. Grine;D. Hancock;J. Hari;J. Hillairet;J. Hosea;S. Huygen;J. Jacquinot;J. Jacquot;A. Kaye;D. Keller;V. Kyrytsya;D. Lockley;F. Louche;H. Machchhar;E. Manon;N. Mantel;R. Martín;M. Mccarthy;A. Messiaen;L. Meunier;D. Milanesio;M. Missirlian;K. Mohan;A. Mukherjee;M. Nightingale;D. Patadia;A. Patel;G. Perrollaz;B. Peters;R. Pitts;M. Porton;K. Rajnish;D. Rasmussen;D. Rathi;R. Sanabria;R. Sartori;M. Shannon;A. Simonetto;R. Singh;G. Suthar;D. Swain;P. Thomas;P. Tigwell;R. Trivedi;M. Vervier;M. Vrancken;D. Wilson;K. Winkler
通讯作者：
P. Lamalle;B. Beaumont;F. Kazarian;T. Gassmann;G. Agarici;P. Ajesh;T. Alonzo;B. Arambhadiya;A. Argouarch;R. Bamber;G. Berger-by;J. Bernard;C. Brun;S. Carpentier;F. Clairet;L. Colas;X. Courtois;A. Davis;C. Dechelle;L. Doceul;P. Dumortier;F. Durodié;F. Ferlay;M. Firdaouss;E. Fredd;J. Giacalone;R. Goulding;N. Greenough;D. Grine;D. Hancock;J. Hari;J. Hillairet;J. Hosea;S. Huygen;J. Jacquinot;J. Jacquot;A. Kaye;D. Keller;V. Kyrytsya;D. Lockley;F. Louche;H. Machchhar;E. Manon;N. Mantel;R. Martín;M. Mccarthy;A. Messiaen;L. Meunier;D. Milanesio;M. Missirlian;K. Mohan;A. Mukherjee;M. Nightingale;D. Patadia;A. Patel;G. Perrollaz;B. Peters;R. Pitts;M. Porton;K. Rajnish;D. Rasmussen;D. Rathi;R. Sanabria;R. Sartori;M. Shannon;A. Simonetto;R. Singh;G. Suthar;D. Swain;P. Thomas;P. Tigwell;R. Trivedi;M. Vervier;M. Vrancken;D. Wilson;K. Winkler