High Power Laser and Particle Beams, Volume. 36, Issue 2, 025012(2024)

Design and analysis of kA stepped pulse current generation scheme

Junhong Chen1, Donghua Xiao2, Yuzhen Xiong2, Yingqiao Wang1, Xiaochang Chen2, Weimin Xuan1, and Yang Ji1
Author Affiliations
  • 1Center for Fusion Science, Southwestern Institute of Physics, Chengdu 610041, China
  • 2School of Physics and Materials Science, Nanchang University, Nanchang 330031, China
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    Toroidal magnetic field should match frequency of the electron cyclotron wave in pre-ionization process of the Tokamak device. The existing electron cyclotron wave frequency of the NCST (Nanchang Spherical Tokamak) is low. A new toroidal coil current generation scheme is proposed to match the current electron cyclotron wave frequency. A low current step is added before the existing flat top current of original scheme. After reviewing the original scheme of the toroidal coil power supply of NCST, two schemes of full control and semi-control are designed. Advantages and disadvantages of the two schemes are compared from four aspects: high order harmonics of voltage and current, controllability and ripple of current, modification cost and installation convenience, and finally the semi-control transformation scheme is selected. The power supply cabinet is modified according to the field conditions with minimum alteration. Actual test results show that the two current steps are connected normally, and the width and amplitude of low current steps are adjustable, which meets the transformation requirements.

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    Junhong Chen, Donghua Xiao, Yuzhen Xiong, Yingqiao Wang, Xiaochang Chen, Weimin Xuan, Yang Ji. Design and analysis of kA stepped pulse current generation scheme[J]. High Power Laser and Particle Beams, 2024, 36(2): 025012

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    Paper Information

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    Received: Jul. 31, 2023

    Accepted: Oct. 7, 2023

    Published Online: Mar. 21, 2024

    The Author Email:

    DOI:10.11884/HPLPB202436.230243

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