Development of HTS Current Feeder Quench Detection System for the EAST Tokamak

• Published in: IEEE transactions on applied superconductivity Vol. 20; no. 3; pp. 2039 - 2042
• Main Authors: Hu, Yanlan, Li, Jiangang, Bi, Yanfang, Xi, Weibing
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.06.2010; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Bi-2223/Ag-Au alloy tapes; Coils; current transmission lines; Delay; Electrical engineering. Electrical power engineering; Electromagnets; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; ELECTRONIC PRODUCTS; Electronics; Exact sciences and technology; Feeders; High temperature superconductors; HTS; MAGNETS; quench propagation; QUENCHING MECHANISMS; SILVER ALLOYS (50 TO 99 AG); Silver base alloys; SOLENOIDS; Superconducting coils; Superconducting films; Superconducting magnets; Superconducting materials; Superconducting transmission lines; SUPERCONDUCTIVITY; SUPERCONDUCTORS; Tokamak devices; Tokamaks; Various equipment and components; Voltage; Performance evaluation; Tokamak; HTS; Toroidal field; Operating conditions; quench propagation; Superconducting magnet; Solenoid; Poloidal field; Transmission line; Response time; Stream line; current transmission lines; Composite superconductor; High temperature superconductor; Bi-2223/Ag-Au alloy tapes
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2010.2044645

A high temperature superconductor (HTS) current feeder system is used as the current transmission lines for EAST Tokamak. It consists of a pair of 16 kA HTS current feeder for the Toroidal Field (TF) coils, 6 pairs of 15 kA current feeders for Central Solenoid (CS) coils and 6 pairs of 15 kA current feeders for the Poloidal Field (PF) coils. The HTS magnets are made of Bi-2223/Ag-Au alloy tapes supplied by American Superconductor Corporation. Several methods have been used for quench detection in the EAST HTS current feeder. For the investigated conditions, detecting resistance voltage shows the best performance as the main quench detection method due to the fastest response time. This paper describes the design of HTS current feeder quench detection system for EAST and emphasizes the development of detecting system in the recent EAST operating scenarios. The relevant upgrade woke for the detecting system has also been assessed in the various operating conditions especially including quench events.