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首页> 外文期刊>Contributions to Plasma Physics >Transient Plasma Measured by Fixed Electric Probes in the Scrape-Off Layer of Korean Superconducting Tokamak Advance Research (KSTAR)
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Transient Plasma Measured by Fixed Electric Probes in the Scrape-Off Layer of Korean Superconducting Tokamak Advance Research (KSTAR)

机译：用固定电探针测量韩国超导托卡马克超前研究（KSTAR）刮擦层中的瞬态等离子体

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Transient plasma behavior in the scrape-off layer(SOL) is analyzed based upon the ion saturation current data measured by ninety-one fixed electric probes during the second and third campaigns of Korean Superconducting Tokamak Advance Research(KSTAR) operations (2010 ～ 2011). Experiments are implemented under the following conditions: plasma current of 600 kA, line average density of 6.1×10~(19)m~(?3), Neutral Beam Injection(NBI) power of 1.5 MW, and injection gas of D2. Probes are made of carbon fiber composite(CFC) with a dome shape structure, and extruded about 1 mm from the surface of the background graphite tiles, which are exposed to the strongly magnetized plasma with an incident angle of the particles impinging on the probe from zero to nine degrees. Probes are installed in the limiter and divertor area of the KSTAR device with a bias voltage of -315 V in order to measure ion saturation currents. The ion saturation currents from the probes could identify the edge localized mode (ELM) phenomena comparing with D-alpha signals. In the distribution of the ion saturation currents measured by a probe array during a diverted plasma discharge process, it is found that two strike points move vertically upward and poloidally up and down at the inboard and central divertors, respectively. A comparative study of plasma behavior measured by electric probes is performed with the theoretical predictors of Equilibrium FITing code (EFIT) data.
机译：根据韩国超导托卡马克超前研究（KSTAR）第二次和第三次活动（2010〜2011）中用九十一个固定电探针测量的离子饱和电流数据，分析了刮除层（SOL）中的瞬态等离子体行为。 。实验在以下条件下进行：等离子体电流为600 kA，线平均密度为6.1×10〜（19）m〜（？3），中性束注入（NBI）功率为1.5 MW，注入气体为D2。探头由具有圆顶形状结构的碳纤维复合材料（CFC）制成，并从背景石墨砖的表面挤出约1毫米，这些石墨砖暴露于强磁化等离子体中，并且入射角从零到九度。探针安装在KSTAR设备的限幅器和分压器区域，偏置电压为-315 V，以便测量离子饱和电流。与D-alpha信号相比，来自探针的离子饱和电流可以识别边缘局部模式（ELM）现象。在分流的等离子体放电过程中由探针阵列测量的离子饱和电流的分布中，发现两个撞击点分别在内侧和中央分流器处分别垂直向上和向下方移动。用平衡FITing码（EFIT）数据的理论预测值对通过电探针测量的等离子体行为进行了比较研究。

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