Kiswire Advanced Technology KAT Introduction & Products 19. May. 2015 Kiswire Advanced Technology

Contents KAT Introduction Nb3Sn Wire NbTi Wire MgB2 Wire MRI Magnet 2

KAT Introduction

History Started R&D for SC wire by internal tin process at Kiswire R&D Center 1998 Found specialized company of superconducting wire at Deajeon 2004 Supplied Nb3Sn SC wire of 2 tons for PF coil to KSTAR Project 2006 Certificated the first supplier of TF Nb3Sn wire to pass CPQS test by ITER in the world 2008 Contracted total Korean quantity of 93 tons of TF Nb3Sn wire 2009 KAT have supplied 93 tons of TF SC wire that is ATPP cleared (2013.11) 2013 KAT is now supplying the Nb3Sn wire for CS Conductors (CS1U, CS2U) 2015

Organization KAT R&D Center Production Resource Wire AD Factory 1 1Team 2Team 1Team 2Team QA Team P. Team M.Team P. Team B.S team Site Analysis Cleaning Assembly Gun Drill Drawing Cr Plating Sn Casting Machining Executive Researcher Operator Total 2 23 30 55

Capacity of SC wire Products Output [T/M) Nb3Sn 4.0 SnTi alloy 1.0 Cr plating

Nb3Sn Wire

Nb3Sn Wire Specification ITEM TF Strand CS Strand Comment Superconductor Type Nb3Sn 　 　 　 　 　 　 Minimum Piece Length 1,000m Cr-plated Strand Dia 0.82 ± 0.005mm Twist Pitch 15 ± 2mm Twist Direction Right Hand Twist Cr Plating Thickness 2.0 +0/-1㎛ Cu/Non Cu Ratio 1.0 ± 0.1 RRR > 100 Between 273 and 20K, after HT Minimum Critical Current Ic ≥ 250A at 4.22K and 12T n-value > 20 at 4.22K and 12T in 0.1~1㎶/cm Maximum Hysteresis Loss < 600 mJ/cc < 500 mJ/cc at 4.22K over a ± 3T cycle We started R&D of Nb3Sn wire in KISWIRE R&D Center which is located in Busan in 1998. In 2004, KAT was established in Daejun. In 2006, We supplied 2 tons of Nb3Sn wire and 65tons of chromium plating to KSTAR project. This project is

Strand Design Concept R-Billet NM NNb NF Ns NTa SC Strand for CS Cond. 19 176 3,344 30 1

Homogeneity of Cr plating thickness 2㎛

NbTi Wire

NbTi Wire Specification ITEM WIC Round Rectangular Shape ` Piece Length < 8,000m < 4,000m Dimension 1.7 x 2.6mm 2.5 x 3.0mm 0.5~2.0mm > 1.0 x 1.0 Twist Pitch 60mm±20% N/A Twist Direction Right Hand Insulation type Braid Cu/NonCu 7 10 4 1 RRR > 80 Jc (A/mm2) > 3000 @4T n-value > 30 @5T Solder Lead Free 12

Comparison of Jc Performance 13

MgB2 Wire

MgB2 Wire Specification Target Company Columbus Hypertech Hitachi WST KAT Country Italy USA Japan China Korea Process Ex-situ In-situ (CTFF) (IMD) Drawing & Rolling Wire design Diameter (Φ) 1.13 0.7~0.9 1.5 <1 No. of fila. 37, 61 19, 36, 61 37 6, 36 6, 18, 36 S. Fraction(%) 17~20 13~18 18 20~25 Length (km) 3~4 6 1 1.2 8 Performance Jc (A/cm2) 240,000 110,000 80,000 200,000 측정자장 (T) 2 5 3 측정온도 (K) 20 4.2 Performance Unit Current Jc (@4.2K, 3T) A/cm2 1 ×105 Diameter Φ 1.1 Module ea 6 Length km 1 Current KAT Achievement 15

MRI Magnet

1.5T MRI MAGNET (KAT15B] KEY PERFORMANCE Homogeneity: < 5ppm @ 50cm DSV Cryostat type: Zero boil off Drift rate: < 0.1ppm/hr Dimension - Bore diameter: 900mm - Length: 1,540mm - Ceiling height: < 2.6m - Weight: 5 tones Stray field: 4m x 2.5m Shield factor: >95%

1.5T MRI MAGNET (KAT15C] KEY PERFORMANCE Homogeneity: < 5ppm @ 50cm DSV Cryostat type: Zero boil off Drift rate: < 0.1ppm/hr Dimension - Bore diameter: 940mm - Length: 1,580mm - Ceiling height: 2.6m - Weight: 5 tones Stray field: 4m x 2.5m Shield factor: >95% 940mm

3.0T MRI MAGNET (KAT30A] KEY PERFORMANCE Homogeneity: < 5ppm @ 50cm DSV Cryostat type: Zero boil off Drift rate: < 0.1ppm/hr Dimension - Bore diameter: 930mm - Length: 1,655mm - Ceiling height: < 2.6m - Weight: 7.2 tones Stray field: 4.52m x 2.8m

Magnet components

Superconducting Magnet Role Magnetic field Protection from Quench Main Parts Superconducting Coil Superconducting Joint Permanent switch Sensor (Temp, Lhe) Protection circuit Voltage meter

Helium Vessel Role Liquid helium container Main Part Pressure vessel (ASME) STST 304L Suspension Charcoal for vacuum

Thermal Shield Role Protection from Radiation heat Main Parts Aluminum vessel (A5083) Suspension MLI(Multi layer insulation)

Outer Vacuum Can Role Vacuum container Support magnet Interface Main Parts Vacuum Can (STST 304L) Vacuum Port Cold Head Interface Main Neck Turret