Feasibility study on quench detection methods of Raman and Rayleigh scattering techniques in optical fiber encapsulated HTS coils

IF 1.3 3区物理与天体物理 Q4 PHYSICS, APPLIED Physica C-superconductivity and Its Applications Pub Date : 2024-03-27 DOI:10.1016/j.physc.2024.1354464

Long Zhang , Yingying Lv , Zhuyong Li , Wenyi Li , Yajun Jia , Junjie Jiang , Xiyuan Teng , Zhixuan Zhang , Kyungwoo Ryu

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Abstract

Quench detection is a key issue to be solved for safe operation of high temperature superconducting (HTS) magnets. Recently, distributed optical fiber sensors based on Raman and Rayleigh scattering techniques are proposed for quench detection in HTS applications. However, sensing and demodulating principles of these two techniques are different, and they may show different performances in quench detection. In this paper, a 13 m long optical fiber encapsulated HTS coil (OF-coil) was fabricated. Two sensing devices based on Raman and Rayleigh techniques, which are named Raman-device and Rayleigh-device, were prepared. Overcurrent and heater induced quench detection experiments in the OF-coil were carried out and the above two devices were used for quench detection. The results show that both Raman-device and Rayleigh-device can measure temperature changes of the OF-coil in the overcurrent experiment. And their quench response time is 36 s and 14 s, respectively. In heater induced quench detection experiment, Rayleigh-device can successfully acquire local temperature rise of the OF-coil, and the quench response time is 1.7 s. For Raman-device, its spatial resolution is too large to realize local quench detection.

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光纤封装 HTS 线圈中拉曼和瑞利散射技术淬火检测方法的可行性研究

淬火检测是高温超导（HTS）磁体安全运行需要解决的一个关键问题。最近，基于拉曼和瑞利散射技术的分布式光纤传感器被提出用于 HTS 应用中的淬火检测。然而，这两种技术的传感和解调原理不同，在淬火检测中可能表现出不同的性能。本文制作了一个 13 米长的光纤封装 HTS 线圈（OF-coil）。制备了两种基于拉曼和瑞利技术的传感设备，分别命名为拉曼设备和瑞利设备。在 OF 线圈中进行了过流和加热器诱导淬火检测实验，并使用上述两个装置进行淬火检测。结果表明，在过流实验中，拉曼器件和瑞利器件都能测量 OF 线圈的温度变化。它们的淬火响应时间分别为 36 秒和 14 秒。在加热器诱导淬火检测实验中，瑞利装置可以成功获取 OF 线圈的局部温升，淬火响应时间为 1.7 s。

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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.