Spectroscopic Studies of a High Mach-Number Rotating Plasma Flow
Spectroscopic Studies of a High Mach-Number Rotating Plasma Flow
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高马赫数旋转等离子体流的光谱研究
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通讯作者：
Yagai Tsuyoshi
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作者：
A. Akira;Ashino Masashi;sAGI Yukiko;Inutake Masaaki;Hattori Kunihiko;Yoshinuma Mikirou;I. Atsushi;Tobari Hiroyuki;Yagai Tsuyoshi
利用日本东北大学的HITOP装置对轴向磁化旋转等离子体的光谱特性进行了研究。He等离子体在MPD电弧加热发动机喷口附近沿轴向流出并旋转。利用He Ⅱ（，？，？）= 468.58nm）和HeI（2 = 587.56nm）谱线。旋转速度随轴向磁场强度和放电电流的增大而增大。随着放电电流的增加和质量流率的降低，等离子体流速增加和Z1增加。等离子体流的离子声马赫数也增加，但趋于饱和在1附近。由得到的旋转速度计算了空间势的径向分布。在核心区域的电位分布是抛物线对应于所观察到的核心等离子体的刚体旋转。
Characteristics of an axially-magnetized rotating plasma are investigated by spectroscopy in the HITOP device of Tohoku University. A He plasma flows out axially and rotates azimuthally near the muzzle region of the MPD arcjet. Flow and rotational velocities and temperature of He ions and atoms are measured by Doppler shift and broadening of the HeII (,?, = 468.58nm) and HeI (2 = 587.56nm) lines. Rotational velocity increases with the increase of axially-applied magnetic field strength and discharge current. As discharge current increases and mass flow rate decreases, the plasma flow velocity increases and Z1 increases. Ion acoustic Mach number of the plasma flow also increases, but tends to saturate at near 1. Radial profile of space potential is calculated from the obtained rotational velocity. The potential profile in the core region is parabolic corresponding to the observed rigid-body rotation of the core plasma.