偏滤器模拟器Mistral-B中漂移低温等离子体复合的实验研究
Experimental study of the recombination of a drifting low temperature plasma in the divertor simulator Mistral-B
摘要：
在一个新的偏滤器模拟器中，利用探针、光谱测量和自发发射的超快成像研究了超冷（Te<1 eV）高密度复合磁化实验室等离子体。Mistral-B装置由线性高密度磁化等离子体柱组成。电离电子起源于位于螺线管边缘场中的大型阴极阵列。电离电子被聚焦在螺线管入口处直径为3 cm的孔中。轴上的典型等离子体密度接近2.10^18 m-3。收集器被分成两个板，并且通过板之间的电势差施加横向电场。洛伦兹力诱导极低温等离子体射流在限制器阴影中喷射。用超高速相机获得了特征对流时间和衰变长度。对重组等离子体的原子物理学的研究可以理解测量的衰变时间并解释发射光谱。
英文摘要：
In a new divertor simulator, an ultra-cold (Te<1 eV) high density recombining magnetized laboratory plasma is studied using probes, spectroscopic measurements, and ultra-fast imaging of spontaneous emission. The Mistral-B device consists in a linear high density magnetized plasma column. The ionizing electrons originate from a large cathode array located in the fringing field of the solenoid. The ionizing electrons are focused in a 3 cm diameter hole at the entrance of the solenoid. The typical plasma density on the axis is close to 2.10^18 m-3. The collector is segmented into two plates and a transverse electric field is applied through a potential difference between the plates. The Lorentz force induces the ejection of a very-low temperature plasma jet in the limiter shadow. The characteristic convection time and decay lengths have been obtained with an ultra-fast camera. The study of the atomic physics of the recombining plasma allows to understand the measured decay time and to explain the emission spectra.
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