In the last several years, great progress of optical and spectroscopic diagnostics has been achieved on the HL-2A tokamak. The main physical goal of these diagnostics is to measure plasma parameters for research of turbulence and transport. These diagnostics include: (1) a Phase Contrast Imaging to calculate wavenumber spectra based on a 10.6-μm CO₂ laser, (2) a multi-channel (48 channels now and 324 channels for future) Beam Emission Spectroscopy (BES) based on neutral beam injection to measure Doppler-shifted 659.1-nm Dα line for density fluctuation measurement, (3) a four-channel Lyman-Alpha-Based BES (LAB) to measure 121-nm vacuum ultraviolet line for edge density fluctuation measurement, (4) a Gas Puff Imaging (GPI) to measure the intensity of 587.6-nm He I line to investigate plasma evolution, (5) a Multi-Color GPI (MC-GPI) to specify electron temperature and plasma density based on the line-intensity-ratio technique, (6) a Doppler Coherent Imaging Spectroscopy (CIS) to measure two-dimensional plasma velocity, (7) a Near-Infrared PCI (NI-PCI) based on a 1.55-μm fiber laser, (8) a Main-Ion Charge eXchange Recombination Spectroscopy (MI-CXRS) for main ion temperature measurement, and (9) a Fast Ion Dα Imaging (FIDA-I) to image two-dimensional energetic ion profiles. The main characteristic of these diagnostics is the high spatiotemporal resolution which is at the orders of millimeters and microseconds to meet the requirement of turbulence investigation. First experimental results obtained by using some of these new diagnostics, such as poloidal asymmetry of flow velocity during edge localized modes (ELMs), localized pedestal mode in high-β ELM-free H-mode, two-dimensional evolution of density blobs and the quasi-coherent mode in H-mode configuration, are also presented.

在过去的几年中，HL-2A托卡马克在光学和光谱诊断上取得了长足的进步。这些诊断程序的主要物理目标是测量血浆参数，以研究湍流和输运。这些诊断包括：（1）相衬成像，基于10.6μmCO ₂计算波数谱（9）快速离子Dα成像（FIDA-I）对二维高能离子分布进行成像。这些诊断的主要特点是时空分辨率高，达到毫米级和微秒级，可以满足湍流研究的需求。通过使用其中一些新的诊断方法获得的第一个实验结果，例如边缘局部化模式（ELM）时流速的极向不对称性，无β高ELM的H模式中的局部化基座模式，密度斑点的二维演化以及还介绍了H模式配置中的准相干模式。这些诊断的主要特点是时空分辨率高，达到毫米级和微秒级，可以满足湍流研究的需求。通过使用其中一些新的诊断方法获得的第一个实验结果，例如边缘局部化模式（ELM）时流速的极向不对称性，无β高ELM的H模式中的局部化基座模式，密度斑点的二维演化以及还介绍了H模式配置中的准相干模式。这些诊断的主要特点是时空分辨率高，达到毫米级和微秒级，可以满足湍流研究的需求。通过使用其中一些新的诊断方法获得的第一个实验结果，例如边缘局部化模式（ELM）时流速的极向不对称性，无β高ELM的H模式中的局部化基座模式，密度斑点的二维演化以及还介绍了H模式配置中的准相干模式。