Speaker
Description
HTS coils will be an essential component of future accelerator magnets. Among the existing challenges, there is the lack of a robust quench detection system for HTS magnet technology. In this work, we explore the use of distributed fiber optics for local real-time monitoring of temperature variations. Fiber optic sensors based on Rayleigh backscattering were used on a series of test performed in liquid He during quench of REBCO tape and Nb3Sn extracted wire. A spot heater is used to initialize an actual quench at several current levels and find the minimum quench power.
We also explore the use of distributed fiber optics for quench detection in STAR® REBCO cables.
Those experiments are providing feedback on fiber sensitivity and to test different coating materials to improve the sensitivity at low temperatures.
