磁镜中晃荡电子形成热垒的动力学计算

对电子回旋共振加热（ECRH）产生晃荡电子形成串级磁镜热垒的物理过程进行了Fokker-Planck动力学计算，计算表明：（1）在一定条件下，晃荡电子等离子体位形形成，其密度比n_eh（Z_r）/n_eh（O）=2.15，且形成了ΔΦ=16.5V的静电势阱；（2）静电势阱的建立分为迅速建立、逐渐减少和稳定平衡三个阶段，这是ECRH、碰撞散射和俘获离子共同作用的结果 关键词：     

磁镜中晃荡电子形成熟垒的实验研究

本文在实验上研究了ＦＣＲＨ产生晃荡电子形成串级磁镜热垒的可行性，并对等离子体电位进行了测量，研究结果表明，ＥＣＲＨ产生晃荡电子形成热垒是成功的。     

托卡马克电子回旋共振加热中反常波轨迹计算

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。     

Experimental characteristics of a lower hybrid wave multi-junction coupler in the HT-7 tokamak

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.