Cruz-Zabala D J, Viezzer E, Rodriguez-Gonzalez A, Segado-Fernandez J, Alvarado-Reyes A, Perez-Gonzalez J, Garcia-Munoz M, Dux R
Department of Atomic, Molecular and Nuclear Physics, University of Seville, Seville 41012, Spain.
Max-Planck-Institut für Plasmaphysik, Garching 85748, Germany.
Rev Sci Instrum. 2024 Jul 1;95(7). doi: 10.1063/5.0219437.
Ion temperature, rotation, and density are key parameters to evaluate the performance of present and future fusion reactors. These parameters are critical for understanding ion heat, momentum, and particle transport, making it mandatory to properly diagnose them. A common technique to measure these properties is charge exchange recombination spectroscopy (CXRS). For characterizing positive and negative triangularity plasmas at the small aspect ratio tokamak, a poloidal array of gas puff based CXRS diagnostics will be measuring the ion properties in different poloidal positions. In this work, the modeling of the expected signal and spatial coverage using the FIDASIM code is presented. Furthermore, the design and characterization of the low field side midplane CXRS diagnostic are described. Each diagnostic is composed of a gas injection system, an optical system that collects the light emitted by the plasma, and a spectrometer. These systems will provide ion temperature, rotation, and density with a radial resolution of 3.75 mm and a temporal resolution of 2.2 ms.
离子温度、旋转和密度是评估当前及未来聚变反应堆性能的关键参数。这些参数对于理解离子热、动量和粒子输运至关重要，因此必须对其进行准确诊断。测量这些特性的一种常用技术是电荷交换复合光谱法（CXRS）。为了表征小长宽比托卡马克中的正、负三角形等离子体，基于气体喷注的CXRS诊断的极向阵列将测量不同极向位置的离子特性。在这项工作中，展示了使用FIDASIM代码对预期信号和空间覆盖范围的建模。此外，还描述了低场侧中平面CXRS诊断的设计和特性。每个诊断装置由一个气体注入系统、一个收集等离子体发射光的光学系统和一个光谱仪组成。这些系统将提供径向分辨率为3.75毫米、时间分辨率为2.2毫秒的离子温度、旋转和密度。
