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Theoretical analysis of ion cyclotron range of frequency antenna array for HT-7U

Chinese Physics B 2005年第11期14卷 2251-2255页

作者：张新军秦成明赵燕平 Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China

This paper considers the coupling analysis of phased antenna array designed to excite fast wave in the ion cyclotron range of frequency. The coupling of the antenna is calculated in slab geometry. The coupling code based on the variational principle gives the self-consistent current flowing in the antenna, this method has been extended so that it can be applied to a phased antenna array. As an example, this paper analyses the coupling prosperities of a 2 × 2 phased antenna array. It gives the optimum geometry of antenna array. The fields excited at plasma surface are found to more or less correspond to the antenna current phasing.

关键词： ion cyclotron range of frequency antenna array variational method

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Simulation of ion cyclotron wave heating in the EXL-50U spherical tokamak based on dispersion relations

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Plasma Science and Technology 2024年第2期26卷 54-61页

作者：马好杰谢华生李博 School of Physics Beihang UniversityBeijing 100191People's Republic of China Hebei Key Laboratory of Compact Fusion Langfang 065001People's Republic of China ENN Science and Technology Development Co.Ltd. Langfang 065001People's Republic of China

This study investigates the single-pass absorption(SPA) of ion cyclotron range of frequency(ICRF) heating in hydrogen plasma of the EXL-50U spherical tokamak,which is an upgraded EXL-50 device with a central solenoid and a stronger magnetic field.The reliability of the kinetic dispersion equation is confirmed by the one-dimensional full-wave code,and the applicability of Porkolab's simplified theoretical SPA model is discussed based on the kinetic dispersion equation.Simulations are conducted to investigate the heating effects of the fundamental and second harmonic frequencies.The results indicate that with the design parameters of the EXL-50U device,the SPA for second harmonic heating is 63%,while the SPA for fundamental heating is 13%.Additionally,the optimal injection frequencies are 23 MHz at 0.9 T and 31 MHz at 1.2 T.The wave vector of the antenna parallel to the magnetic field,with a value of k_‖=7.5 m^(-1),falls within the optimal heating region.Simulations reveal that the ICRF heating system can play an important role in the ion heating of the EXL-50U.

关键词： ion cyclotron range of frequency single-pass absorption spherical tokamak

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