Speaker
Description
Previously, we verified the feasibility of using a Raman-based distributed temperature sensor (RmDTS) system to measure a no insulated (NI) high temperature superconducting (HTS) coil temperature variation during an overcurrent induced quench event. In addition, to reduce the temperature response time of the RmDTS, we further optimized the whole measurement system. However, the combination method between optical fibers and HTS coil in these works is immobilizing spiral optical fibers on the turn-by-turn surface of HTS coil by using epoxy which could be harmful for the structures of HTS coils. Therefore, an ideal combination structure that encapsulating optical fibers in HTS tapes along the length direction was proposed. Before winding HTS coils, the electrical properties of these optical fiber encapsulated HTS tapes (OFE-HTS tapes) should be studied in advanced. In this study, we have compare the vibration of the critical current values, resistive values at room temperature, anti-impulse current characteristics of normal HTS tapes and OFE-HTS ones. The foundational study can really promote the RmDTS application for quench detection. More detailed experimentation and comparison results will be presented and discussed in this paper.
