hl2m内部共振磁扰动线圈的初步设计及应力与热分析-preliminary design and stress and thermal analysis of hl2m internal resonant magnetic disturbance coil.docx

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2018-05-29 发布于上海
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hl2m内部共振磁扰动线圈的初步设计及应力与热分析-preliminary design and stress and thermal analysis of hl2m internal resonant magnetic disturbance coil.docx

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hl2m内部共振磁扰动线圈的初步设计及应力与热分析-preliminary design and stress and thermal analysis of hl2m internal resonant magnetic disturbance coil

AbstractHL-2A，which is a copper conductor tokamak directed by Southwestern Institute of Physics (SWIP), is being modified as HL-2M. HL-2M will inherit and make full use of the conditions in HL-2A. In order to get the plasma with higher beta, longer energy confinement time and higher bootstrap current, the auxiliary heating power in HL-2M will be up to 20MW, which makes easier to explore the reactor relevant regimes with high plasma core confinement.In order to control and study high performance and high parameter plasma, in-vessel resonant magnetic perturbation (RMP) coils are proposed for the design of HL-2Mtokamak to suppress MHD instabilities, such as edge localized mode (ELM ） andresistance wall mode (RWM). The coils could also be used to compensate error field to improve plasma confinement. Each coil is to be fed with a current up to 5 kA, operated with a frequency range of dc to about 1 kHz. Two set of coils (1×6, 1×18) are arranged in toroidal rows in the upper half of the VV, and the in-vessel RMP coils are symmetrically located in the upper and lower halves. The support, insulation and vacuum sealing in a very limited space are crucial issues for designing in-vessel RMP coils, and the coils must withstand large electromagnetic (EM) and thermal loads. In this paper, the structure, support, insulation and vacuum sealing of the in-vessel RMP coils for HL-2M are introduced. Finite element calculations are performed to optimize the support by minimizing stress caused by EM forces on the coil conductors, then the minimum stress is used to check the strength and get the life time of the coil. The temperature rise occurringon the coil in normal working condition and 300℃ baking condition are worked out, andcorresponding thermal stresses caused by thermal expansion of materials are evaluated to be allowable. The times that take to cool down the coils in different working conditions are also discussed.Key words: HL-2M tokamakResonant magnetic per