Jul 21 – 25, 2019
Connecticut Convention Center, Level 6
US/Eastern timezone

M1Or3B-02 [Invited]: ReBCO processing techniques and cryogenic measurements to enhance 2G HTS quality

Jul 22, 2019, 4:25 PM
Level 6, Room 14

Level 6, Room 14


Mr Ken Pfeiffer (STI)


STI continues to improve our High Temperature Superconducting (HTS) ReBCO coated conductor production and metrology techniques to deliver higher-performance & lower-cost superconducting products to our customers in key application markets. In this talk, we’ll cover (3) areas of our recent focus to enhance our product qualities; Long length in-field metrology for 2G HTS characterization, Process controls for higher performance ReBCO film properties during growth, & slitting processes to minimize yield loss for narrow gauge applications.

Metrology: A goal for our Dept. of Energy grant is to develop ReBCO characterization measurements up to 2 Tesla B-Field & at all-angles & 65K on continuous long-length superconductor tapes. STI is working on a cryogenic sensor technology for an inline superconductor measurement machine & will report on progress.

Process Control: 2G HTS ReBCO superconductor crystal growth is best accomplished in precisely controlled oxygen partial pressure and at high temperatures (>750oC). STI is working with Fiber Bragg arrays for improved in-situ high temperature process control accuracy & repeatability in large area furnaces to achieve higher yield production and lower costs.

Slitting: STI grows ReBCO 2G HTS on foil substrates up to 550m long x 16mm wide. Some product applications require the superconductors to be as thin as 1mm, like discrete wires. We’ll review slitting effects on superconducting wire quality over long-lengths and our findings on different processing techniques used to-date.

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Presentation materials