Salas-Suárez-Bárcena J, Delgado-Aparicio L F, Segado-Fernández J, Rodríguez-González A, McKay K A, Cruz-Zabala D J, Hidalgo-Salaverri J, García-Domínguez J, García-Muñoz M, Viezzer E, Galdón-Quiroga J
Department of Atomic, Molecular and Nuclear Physics, University of Seville, Seville 41012, Spain.
Princeton Plasma Physics Laboratory, Princeton, New Jersey New Jersey 08543, USA.
Rev Sci Instrum. 2024 Sep 1;95(9). doi: 10.1063/5.0219506.
A multi-energy soft x-ray diagnostic is planned to operate in the small aspect ratio tokamak (SMART), consisting of five cameras: one for core measurements, two for edge, and two for divertors. Each camera is equipped with four absolute extreme ultra-violet diodes, with three of them filtered by Ti and Al foils for C and O line emissions, respectively, and Be foils for temperature measurements. In addition, two spectrometers will be installed with a vertical line of sight for impurity control. This study introduces a synthetic model designed to characterize radiated power and soft x-ray emissions. The developed code extracts the radiated power and Zeff values by leveraging distributions of electron density, temperatures, and impurity concentrations. The investigation is centered on the predicted scenarios of SMART's first phase of operation (Ip = 100 kA; Bt = 0.1 T), employing a double-null configuration with positive and negative triangularity. The anticipated impurities encompass C (1%) and Fe (0.01%) from the vessel, as well as O and N (0.1%) from air and water. For simplicity, the distribution is assumed to be homogeneous within the plasma, considering different mixtures with Zeff values ranging between 1 and 2. Finally, the model estimates signal strength for the diagnostic design, proving its feasibility.
计划在小长宽比托卡马克装置（SMART）中运行一种多能量软X射线诊断设备，它由五个相机组成：一个用于核心测量，两个用于边缘测量，两个用于偏滤器测量。每个相机配备有四个绝对极紫外二极管，其中三个分别通过钛箔和铝箔过滤，用于测量碳和氧线发射，还有一个通过铍箔用于温度测量。此外，将安装两台光谱仪，用于垂直视线方向的杂质控制。本研究介绍了一种旨在表征辐射功率和软X射线发射的综合模型。开发的代码通过利用电子密度、温度和杂质浓度的分布来提取辐射功率和有效电荷数（Zeff）值。研究集中在SMART第一阶段运行的预测场景（Ip = 100 kA；Bt = 0.1 T），采用具有正负三角形系数的双零配置。预期的杂质包括来自容器的碳（1%）和铁（0.01%），以及来自空气和水的氧和氮（0.1%）。为简单起见，假设等离子体内的分布是均匀的，考虑了有效电荷数在1到2之间的不同混合物。最后，该模型为诊断设计估计了信号强度，证明了其可行性。
