20 YEARS 2G superconducting tape for magnet applications Markus Bauer THEVA Dünnschichttechnik GmbH WAMHTS-4 Workshop, Barcelona, 16.2.2017 1
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HTS PRODUCTION LINE Setting worldwide standards Pilot line features Modular, fully-automated Continuous vacuum tape locking Inline quality control Production capacity: 150 km/yr (@ 12 mm-width) Production tape length: 350 m, to be increased up to 600 m, soon! Goals Cost efficient production Robust process allowing high yield Implementation of industrial standards Stringent quality management 3
THEVA Pro-Line 2G superconducting tape by PVD simple layer architecture industrial-grade deposition technique (e-beam evaporation) in-house designed and manufactured equipment unique approach all IP owned by THEVA Contact layer Silver Superconductor GdBaCuO Cap layer MgO Orientation layer ISD-MgO Silver GdBCO E-polished substrate Hastelloy C276 MgO MgO 4
ORIENTED BUFFER LAYER Inclined substrate deposition (ISD) ISD MgO buffer layer simple process, fast growth > 6 nm/s tilted substrate (30 ) room temperature [001] MgO [110] MgO-Orientation (XRD) tilt angle of MgO<100> b 30 in-plane D < 10 out-of-plane D < 4 tape direction 5
Tunable performance positive effect of the tilt angle Comparison of laboratory results with production tapes tilt leads to overgrowth of precipitates and misoriented regions J c is thickness independent! Very high I c possible! 6
Tunable performance first effect of the tilt angle 2,0 µm I c > 200 A 12 mm 77 K, self field Tapestar measurements 3,5 µm I c > 400 A 12 mm 5,5 µm I c > 600 A 12 mm 60 m 7
Improving performance on long tapes 1000 A Aug. 2016 3,6 µm 340 m, 12 mm 1000 A Jan. 2017 2,4 µm 240 m, 12 mm 8
THEVA ProLine tapes for magnets Laminated Plated 50 µm and 100 µm thick Cu stabilization 12 mm width 5 µm 20 µm surround coating optional: pre-tinned 12 mm width available 3.4 mm 6 mm in development test pieces available 9
REDUCED CRITICAL CURRENT 1,2 Mechanical properties Bending test TPL4100 Datenreihen1 Datenreihen3 1,0 0,8 0,6 0,4 0,2 0,0-1,0% -0,5% 0,0% 0,5% 1,0% BENDING STRAIN 10
Magnetic field performance 10 T, 4.2 K 6 mm wide tapes I c (77K, s.f.) = 310 A 180 160 140 120 100 80 11
lift factor lift factor Magnetic Field Performance Typical performance at 25 K 40 K Typical Field dependence 5 4 3 3 T 25 K 30 K 35 K 40 K 7 I c,min (B c at 30 ) 6 5 4 25 K 30 K 35 K 40 K 2 3 2 1 1 0 0 30 60 90 120 150 180 210 240 angle [ ] 0 0 1 2 3 4 5 6 7 8 magnetic field [T] more data available! 12
J c (MA/cm 2 ) Outlook additional pinning Increase of performance 10 9 8 7 6 5 4 3 2 30 K, B//c 0 mol.% (GB pinning) 2.1 mol.% (Extended pinning) 8.6 mol.% (Random pinning) 0 mol.% (Production sample: BL15083) Artificial pinning also effective on ISD-MgO buffer layer BaHfO and BrZrO was tested also deposition parameters influence pinning 1 0 1 2 3 4 5 6 7 8 9 B (T) 13
Tapestar system EUROPEAN DEVELOPMENT OF SUPERCONDUCTING TAPES State of the art: existing magnetoscan device Tapestar measurement of Ic along the type with 1 mm resolution at high speed well known, used worldwide 77 K The research leading to these results has received funding from the European Union s Seventh Framework Programme (FP7/2007-2013) under grant agreement nº 280432 http://www.eurotapes.eu 14
Advanced Tapestar System with Inversion of Hall-Scanning data EUROPEAN DEVELOPMENT OF SUPERCONDUCTING TAPES previous New: 2D-Ic map previous New: 2D-Ic map The research leading to these results has received funding from the European Union s Seventh Framework Programme (FP7/2007-2013) under grant agreement nº 280432 http://www.eurotapes.eu
H2020 Project : EcoSwing The idea is to replace a PM generator with a superconducting generator full scale multi-megawatt direct-drive superconducting wind generator Installation on an existing modern wind turbine in Thyborøn, Denmark (3.6 MW, 15 rpm, 128 m rotor) THEVA is responsible for all HTS tapes and HTS coil manufacturing EcoSwing has received funding from the European Union s Horizon 2020 research and innovation programme under grant agreement No 656024. Herein we reflect only the author's view. The Commission is not responsible for any use that may be made of the information it contains. 16
All roads capability: We limit the diameter to < 4 m Low cost design: No frills for superconductors Low weight design: Optimized for low top head mass 40% lower weight PM Superconductor EcoSwing has received funding from the European Union s Horizon 2020 research and innovation programme under grant agreement No 656024. Herein we reflect only the author's view. The Commission is not responsible for any use that may be made of the information it contains. 17
Subscale Test Coil test coil #1 - single layer - 10 turns 77K LN 2 test in LN 2 conduction cooled Ic 216 A 215 A n 37 44 pole assembly - magnetic pole piece - non magnetic mechanical support - conduction cooling EcoSwing has received funding from the European Union s Horizon 2020 research and innovation programme under grant agreement No 656024. Herein we reflect only the author's view. The Commission is not responsible for any use that may be made of the information it contains. 18
Lap Joints Development of highly reproducible joints portable SPS controlled joint soldering 10 cm long lap joints (12 mm) Solder: In97Ag3 highly reproducible typical: 4.8 n or 60 n cm² @ 77 K EcoSwing has received funding from the European Union s Horizon 2020 research and innovation programme under grant agreement No 656024. Herein we reflect only the author's view. The Commission is not responsible for any use that may be made of the information it contains. 19
EcoSwing Generator Coils Per coil: about 200 turns with 500 m of copper laminated HTS wire 1,4 m double pancake, insulated design, potted using commercial resin,glass fiber reinforced Use of casting mold for smooth surface optimum mechanical and thermal contact operating temperature < 30 K, conduction cooled with cold heads + 30 coils will be produced coil pole assembly EcoSwing has received funding from the European Union s Horizon 2020 research and innovation programme under grant agreement No 656024. Herein we reflect only the author's view. The Commission is not responsible for any use that may be made of the information it contains. 20
Generator coil Type testing operating conditions EcoSwing has received funding from the European Union s Horizon 2020 research and innovation programme under grant agreement No 656024. Herein we reflect only the author's view. The Commission is not responsible for any use that may be made of the information it contains. 21
Summary Pilot production line with 150 km/a (12 mm) capacity at THEVA I c up to 600 A (77K, s.f.) or 500 A/cm at 60 m 400 A on 200 m + long tapes Different types and thicknesses of Cu stabilization available 12 mm wide tapes can be delivered immediately 3.4 mm 6 mm wide tapes to be available soon! Coil winding and casting process developed HTS coils with size up to 1,4 m can be produced Advanced Tapestar system with 2D-Ic-mapping Ask for offers or samples: info@theva.com or bauer@theva.com 22
Thank you! THEVA Dünnschichttechnik GmbH Rote-Kreuz-Str. 8 D-85737 Ismaning Germany Tel.: +49 89 923346 0 Web.: www.theva.de Mail.: info@theva.de 23