低杂波天线前的快往复探针系统及其对刮削层的测量

A RECIPROCATIONG LANGMUIR PROBE SYSTEM IN FRONT OF THE LH LAUNCHER AND THE MEASUREMENTS FOR LOCAL SOL LAYER

为了探测射频 (RF)波对中心等离子体的耦合机理 ,一个快往复式探针系统被装在TOKA MAK的低杂波天线上 ,用圆柱形的压缩空气驱动器和弹簧 ,系统能在 1.5秒钟内沿水平方向上可靠的运动 2 5厘米 .一个空间分辨率达 1- 2毫米的双探针测量系统测出了最后一个封闭磁面和第一壁之间的刮削层 (SOL)等离子体的大致情况 ,电子密度ne 和Te 温度与三探针测量结果符合的非常好 .当LH波对中心等离子体耦合得非常好时 ,观察到LH天线口附近电子温度上升 ,电子密度大约在 7～ 10× 10 16m- 3.

In order to investigate an improved coupling mechanism of RF wave to the core plasma, a fast reciprocating probe was incorporated into a LH launcher. Using a compact pneumatic cylinder drive and springs, the system can scan 25cm in 1.5s. A double probe measurement provided the scrape-off layer plasma profile. The profiles of the electron density and temperature were in good agreement with triple probe method. The localincreased during the LH wave injection with good coupling to the core plasma.