The influence of the additional coil and ferromagnetic rings on high-temperature superconducting engine magnets

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED

Physica C-superconductivity and Its Applications Pub Date : 2025-02-20 DOI:10.1016/j.physc.2025.1354665

Wei Liu , Wentao Zhang , Weiwei Zhang , Yongbin Wang , Haowei Wu , Donghui Liu

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引用次数: 0

Abstract

A plasma engine with high-temperature superconducting (HTS) tapes offers advantages such as high efficiency, high thrust, and high specific impulse. However, due to the magnetic field-dependent characteristics of HTS tapes, the magnetic field at the coil ends tends to decrease rapidly. To mitigate this issue, a small additional coil can be wound at the coil end to enhance the magnetic field, or ferromagnetic rings can be employed to modify the local magnetic flux lines direction within the superconductor, thereby reducing the impact of radial magnetic fields on the critical current of the HTS tapes. In this study, to analyze the effects of the additional coil and ferromagnetic rings, a two-dimensional axisymmetric numerical model is established, and the T-A formulation is utilized to investigate the axial centerline magnetic field distribution of the HTS engine magnet. The simulation results indicate that varying the coil current primarily affects the peak value of the magnetic field without altering its configuration. The addition of an additional coil at the coil end effectively mitigates the rapid decline in the magnetic field at the coil end. The results also indicate that adding ferromagnetic rings can reduce the influence of the radial magnetic field on the critical current, thus enhancing the magnetic field at the coil ends. Furthermore, the results of the radial magnetic field distribution at the end of Coil-4 indicate that ferromagnetic rings can significantly reduce the magnitude of the radial magnetic field at the coil surface.

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来源期刊

Physica C-superconductivity and Its Applications 物理-物理：应用

CiteScore

2.70

自引率

11.80%

发文量

102

审稿时长

66 days

期刊介绍： Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.