Fig. 1. The structure of HPPX.HPPX装置结构图

Fig. 2. Radial profiles of plasma density: (a) Parabolic density profile; (b) Gaussian density profile.等离子体径向密度分布　(a) 抛物面分布; (b)高斯分布

Fig. 3. Relative power absorption in radial (z = 0.2 m) and axial (r = 0.02 m) directions for three typical helicon wave antennas: (a) Radial relative absorption power of three antennas under parabolic density distribution; (b) radial relative absorption power of three antennas under Gaussian density distribution; (c) axial relative absorption of power of three antennas under parabolic density distribution; (d) axial relative absorption of power of three antennas under Gaussian density distribution. 3种典型的螺旋波天线的径向(z = 0.2 m)和轴向(r = 0.02 m)相对吸收功率　(a)抛物面密度分布下3种天线的径向相对吸收功率; (b)高斯密度分布下3种天线的径向相对吸收功率; (c)抛物面密度分布下3种天线的轴向相对吸收功率; (d)高斯密度分布下3种天线的轴向相对吸收功率

Fig. 4. Relative power absorption in radial (z = 0.2 m) directions for different antenna lengths: (a) Effect of antenna length on radial relative absorption power under parabolic density distribution; (b) effect of antenna length on radial relative absorption power under Gaussian density distribution; (c) radial relative absorption power of different antennas lengths under parabolic density distribution; (d) radial relative absorption power of different antennas lengths under Gaussian density distribution. 不同天线长度下的径向(z = 0.2 m)吸收功率　(a)抛物面密度分布下天线长度对径向相对吸收功率的影响; (b)高斯密度分布下天线长度对径向相对吸收功率的影响; (c)抛物面密度分布下径向吸收功率随天线长度的变化曲线; (d)高斯密度分布下径向吸收功率随天线长度的变化曲线

Fig. 5. Relative power absorption in radial (z = 0.2 m) directions for various operating frequencies: (a) Effect of various operating frequencies on radial relative absorption power under parabolic density distribution; (b) effect of various operating frequencies on radial relative absorption power under Gaussian density distribution; (c) radial relative absorption power of various operating frequencies under parabolic density distribution; (d) radial relative absorption power of various operating frequencies under Gaussian density distribution. 不同运行频率下的径向(z = 0.2 m)吸收功率　(a)抛物面密度分布下天线运行频率对径向相对吸收功率的影响; (b)高斯密度分布下天线运行频率对径向相对吸收功率的影响; (c) 抛物面密度分布下径向吸收功率随运行频率的变化曲线; (d)高斯密度分布下径向吸收功率随运行频率的变化曲线

Fig. 6. Relative power absorption in radial (z = 0.2 m) directions for various static magnetic intensity: (a) Effect of various magnetic intensity on radial relative absorption power under parabolic density distribution; (b) effect of various magnetic intensity on radial relative absorption power under Gaussian density distribution; (c) radial relative absorption power of various magnetic intensity under parabolic density distribution; (d) radial relative absorption power of various magnetic intensity under Gaussian density distribution. 不同静磁场下的径向(z = 0.2 m)吸收功率　(a)抛物面密度分布下磁场对径向相对吸收功率的影响; (b)高斯密度分布下磁场对径向相对吸收功率的影响; (c)抛物面密度分布下径向吸收功率随磁场强度的变化曲线; (d)高斯密度分布下径向吸收功率随磁场强度的变化曲线

Fig. 7. Relative power absorption in radial (z = 0.2 m) directions for various density: (a) Effect of various density on radial relative absorption power under parabolic density distribution; (b) effect of various density on radial relative absorption power under Gaussian density distribution; (c) radial relative absorption power of various density under parabolic density distribution; (d) radialrelative absorption power of various density under Gaussian density distribution. 不同密度下的径向(z = 0.2 m)吸收功率　(a)抛物面密度分布下密度对径向相对吸收功率的影响; (b)高斯密度分布下密度对径向相对吸收功率的影响; (c)抛物面密度分布下径向吸收功率随密度大小的变化曲线; (d)高斯密度分布下径向吸收功率随密度大小的变化曲线

Fig. 8. Radial profiles (z = 0.2 m) of wave electric field, magnetic field and current density in parabolic density profile and Gaussian density profile. 不同密度分布下的等离子体径向(z = 0.2 m)感应电场、感应磁场及电流密度分布