论文标题
对托卡马克边缘的密度测量的强度折射率原理的实验验证
Experimental validation of the intensity refractometry principle for density measurements at the edge of a tokamak
论文作者
论文摘要
对一种新型的微波诊断进行了实验验证，该诊断是在M. Usoltceva等人的理论研究中首次引入的。乐器。 93，013502（2022）。该技术采用了一个新术语，以突出其与干涉测量法的差异：强度折射率。诊断允许测量电子密度，在这项工作中，它在Tokamak的边缘进行了应用。在ASDEX升级处的该技术的实现，称为限制器阴影中称为微波强度折光仪（MILS），提供了诊断概念的第一个实验证明。将MILS预测的密度与其他几种诊断进行了比较。分析了密度分布的各个径向区域的一致性和差异，并讨论了可能的原因。示例放电中显示了宽密度的覆盖率，其密度从限制器位置为2*10^17 m^-3至2*10^19 m^-3。在这些实验中，测量值的径向位置从限制器前方的5 cm（分隔内的1厘米）到限制器阴影中的3 cm不等。提出了MILS操作和数据处理的实验挑战。
Experimental validation is presented for a new type of microwave diagnostic, first introduced in the theoretical study in M. Usoltceva et al., Rev. Sci. Instrum. 93, 013502 (2022). A new term is adopted for this technique to highlight its difference from interferometry: intensity refractometry. The diagnostic allows measuring electron density, and in this work, it is applied at the edge of a tokamak. The implementation of this technique at ASDEX Upgrade, called Microwave Intensity refractometer in the Limiter Shadow (MILS), provides the first experimental proof of the diagnostic concept. Densities predicted by MILS are compared to several other diagnostics. The agreement and discrepancy in various radial regions of the density profile are analyzed and possible reasons are discussed. A wide density coverage is shown in the example discharges with densities from 2*10^17 m^-3 to 2*10^19 m^-3 at the limiter position. In these experiments, the radial location of the measurements varied from 5 cm in front of the limiter (up to 1 cm inside the separatrix was measured) to 3 cm in the limiter shadow. Experimental challenges of MILS operation and data processing are presented.
