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GTC Simulation of Ideal Ballooning Mode in tokamak plasmas

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Plasma Science and Technology 2013年第6期15卷 499-505页

作者：李泽彬孙国亚 Ihor HOLOD 肖湧张文禄林志宏 Department of Physics and Institute of Theoretical Physics and Astrophysics Xiamen University Department of Physics and Astronomy University of CaliforniaIrvineCalifornia 92697USA Institute of Fusion Theory and Simulation Zhejiang University CAS Key Laboratory of Basic Plasma Physics University of Science and Technology of China Department of Physics and Astronomy University of California Fusion Simulation Center Peking University

In the present paper,we first derive the eigenmode equation of the ideal ballooning mode in tokamak plasmas using a gyrokinetic *** is shown that the gyrokinetic eigenmode equation can be reduced to the magnetohydrodynamic（MHD） form in the long wavelength limit when kinetic effects are ***,the global gyrokinetic toroidal code（GTC） is applied for simulations of the edge-localized ideal ballooning *** obtained mode structures are compared with the results of ideal MHD *** observed scaling of the linear growth rate with the toroidal mode number is consistent with the ideal MHD *** simulation results verify the GTC capability of simulating MHD processes in toroidal plasmas.

关键词： edge-localized ideal ballooning mode global gyrokinetic toroidal code tokamak plasmas

Line identification of extreme ultraviolet (EUV) spectra from low-Z impurity ions in EAST tokamak plasmas

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Plasma Science and Technology 2021年第7期23卷 15-30页

作者： Lei LI Ling ZHANG Zong XU Shigeru MORITA Yunxin CHENG Fengling ZHANG Wenmin ZHANG Yanmin DUAN Qing ZANG Shouxin WANG Shuyu DAI Guizhong ZUO Zhen SUN Liang WANG Xiaobin DING Jinping QIAN Haiqing LIU Liqun HU Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People’s Republic of China University of Science and Technology of China Hefei 230026People’s Republic of China Advanced Energy Research Center Shenzhen UniversityShenzhen 518060People’s Republic of China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060People’s Republic of China National Institute for Fusion Science Toki 509-5292GifuJapan Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024People’s Republic of China Key Laboratory of Atomic and Molecular Physics and Functional Materials of Gansu Province College of Physics and Electronic EngineeringNorthwest Normal UniversityLanzhou 730070People’s Republic of China

Extreme ultraviolet(EUV) spectra emitted from low-Z impurity ions in the wavelength range of10–500Å were observed in Experimental Advanced Superconducting tokamak(EAST)discharges. Several spectral lines from K-and L-shell partially ionized ions were successfully observed with sufficient spectral intensities and resolutions for helium, lithium, boron, carbon,oxygen, neon, silicon and argon using two fast-time-response EUV spectrometers of which the spectral intensities are absolutely calibrated based on the intensity comparison method between visible and EUV bremsstrahlung continua. The wavelength is carefully calibrated using wellknown spectra. The lithium, boron and silicon are individually introduced for the wall coating of the EAST vacuum vessel to suppress mainly the hydrogen and oxygen influxes from the vacuum wall, while the carbon and oxygen intrinsically exist in the plasma. The helium is frequently used as the working gas as well as the deuterium. The neon and argon are also often used for the radiation cooling of edge plasma to reduce the heat flux onto the divertor plate. The measured spectra were analyzed mainly based on the database of National Institute of Standards and Technology. As a result, spectral lines of He Ⅱ, Li Ⅱ–Ⅲ, B Ⅳ–Ⅴ, C Ⅲ–Ⅵ, O Ⅲ–Ⅷ, Ne Ⅱ–Ⅹ,Si Ⅴ–Ⅻ, and Ar Ⅹ–XVI are identified in EAST plasmas of which the central electron temperature and chord-averaged electron density range in Te0=0.6–2.8 keV and ne=(0.5–6.0)×1019 m-3, respectively. The wavelengths and transitions of EUV lines identified here are summarized and listed in a table for each impurity species as the database for EUV spectroscopy using fusion plasmas.

关键词： line identification EUV spectroscopy EUV spectra impurity line emissions tokamak plasmas

A synthetic diagnostics platform for microwave imaging diagnostics in tokamaks

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Plasma Science and Technology 2024年第3期26卷 38-45页

作者：李子涵杨尚川徐新航张立夫渠承明李诚普庄革谢锦林 Department of Plasma Physics and Fusion Engineering University of Science and Technology of ChinaHefei 230026People's Republic of China

Interpreting experimental diagnostics data in tokamaks,while considering non-ideal effects,is challenging due to the complexity of *** address this challenge,a general synthetic diagnostics(GSD)platform has been established that facilitates microwave imaging reflectometry and electron cyclotron emission *** platform utilizes plasma profiles as input and incorporates the finite-difference time domain,ray tracing and the radiative transfer equation to calculate the propagation of plasma spontaneous radiation and the external electromagnetic field in *** tests for classical cases have been conducted to verify the accuracy of every core module in the GSD ***,2D imaging of a typical electron temperature distribution is reproduced by this platform and the results are consistent with the given real experimental *** platform also has the potential to be extended to 3D electromagnetic field simulations and other microwave diagnostics such as cross-polarization scattering.

关键词： synthetic diagnostics tokamak plasmas microwave imaging diagnostics microwave imaging reflectometer electron cyclotron emission imaging