Effective quench detection technologies are extremely important for protecting high temperature superconducting (HTS) applications. In recent years, an optical fiber encapsulated HTS tape (OF-tape) is proposed for quench detection by using distributed temperature sensing (DTS) technology. In this paper, an HTS coil (OF-coil) wound with a 39 m long OF-tape was prepared and energized by an AC overcurrent of 700 A to verify the feasibility of temperature observation during quench events. Furthermore, anti-stokes intensity was also measured to understand dependence of temporal resolutions on response times of coil quenches. The main results show that temperature variations of the OF-coil can be correctly measured after quench and the maximum temperature is shown at the middle turn of the OF-coil. Particularly, for the method of detecting anti-stokes intensity, quench response time of temporal resolution (TR.) with 30 ms is about 500 ms faster than that with 300 ms. However, when the TR. is 30 ms, more noise signal is observed. Accordingly, a trade-off should be considered between response time and noise signal for efficient quench detection.

中文翻译：

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光纤密封带缠绕非绝缘高温超导线圈的温度分布观察

有效的失超检测技术对于保护高温超导（HTS）应用极为重要。近年来，提出了一种使用分布式温度感测（DTS）技术的光纤封装的HTS胶带（OF-tape）来进行失超检测。在本文中，准备了一条缠绕有39 m长的OF胶带的HTS线圈（OF线圈），并通过700 A的交流过电流对其进行了通电，以验证淬火过程中观察温度的可行性。此外，还测量了抗焦炭强度，以了解时间分辨率对线圈淬火响应时间的依赖性。主要结果表明，淬火后可以正确测量OF线圈的温度变化，并且最高温度显示在OF线圈的中圈。特别，对于检测抗焦炭强度的方法，时间分辨率（TR。）的淬灭响应时间比30 ms快约500 ms。但是，当TR。如果为30 ms，则会观察到更多的噪声信号。因此，应考虑在响应时间和噪声信号之间进行权衡，以进行有效的失超检测。