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给出了用于HT-7超导托卡马克聚变实验装置的电子回旋共振加热(ECRH)系统大功率毫米波传输线的设计,该传输线将回旋管输出的频率为60GHZ,峰值功率200KW,脉冲宽度不大于100ms的毫米波传输数十米,在传输过程中将最初的TE02波转换为TE01波,再进一步转换至准线性TE11波,最终通过准光学天线将该毫米波以一定的角度发射到托卡马克等离子体中。 相似文献
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本文计算了在CT-6托卡马克上进行电子回旋共振加热实验时对应不同窗口、不同入射角的反常波轨迹。对于发射结构是开口圆波导的情况也进行了初步的分析和计算。由于采用的是准垂直色散关系,所以只能给出大角度入射的结果。 相似文献
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Experimental characteristics of a lower hybrid wave multi-junction coupler in the HT-7 tokamak 总被引:1,自引:0,他引:1 下载免费PDF全文
A phase-controlled lower hybrid wave (LHW) multi-junction (MJ) coupler
(3(rows)×(columns)× (subwaveguides)) has been developed in the
HT-7 tokamak. Simulations show that it is more effective for driving plasma current
than an ordinary phase-controlled LHW antenna (3(rows)×12(columns))
(traditional coupler). The plasma--wave coupling experiments show that the
reflection coefficient (RC) is below 10%, implying that the MJ grill can launch
the wave into the plasma effectively. The effect of power spectrum launched by the
MJ coupler on RC indicates that an optimal condition is requisite for a better
coupling in the lower hybrid current drive (LHCD) experiments. Studies indicate that
the drive efficiency of the MJ antenna is higher than that of the traditional one,
which is mainly ascribed to the discrepancy in impurity concentration, plasma
temperature, and spectrum directivity. An improved confinement with an electron
internal transport barrier is obtained by LHCD. The analysis shows that the
modified negative (low) magnetic shear and the change of radial electric field
profile due to LHCD are possible factors responsible for the eITB formation. 相似文献
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