19. May. 2015

Kiswire Advanced Technology

KAT Introduction & Products

Con-tents

Nb3Sn Wire

NbTi Wire

MgB2 Wire

KAT Introduction

MRI Magnet

KAT Introduction

Contracted total Korean quantity of 93 tons of TF Nb3Sn wire

Supplied Nb3Sn SC wire of 2 tons for PF coil to KSTAR Project

2004

2006

2009

2013

Certificated the first supplier of TF Nb3Sn wire to pass CPQS test by ITER in the world200

8

Started R&D for SC wire by internal tin process at Kiswire R&D Center1998

Found specialized company of superconducting wire at Deajeon

KAT have supplied 93 tons of TF SC wire that is ATPP cleared (2013.11)

KAT is now supplying the Nb3Sn wire for CS Conductors (CS1U, CS2U)2015

His-tory

4/26

Executive Researcher Operator Total

2 23 30 55

Organiza-tion

QA Team1Team 2Team

R&D Center

Factory 1Wire AD

1Team 2Team

Production Resource

B.S team

KAT

Analysis MachiningSn CastingAssembly Cr PlatingGun Drill DrawingCleaning

Site

Factory 2

P. Team M.Team P. Team

5/26

Capacity of SC wireProducts Output [T/M)

Nb3Sn 4.0

SnTi alloy 1.0

Cr plating 4.0

6/26

Nb3Sn Wire

ITEM TF Strand CS Strand Comment

Superconductor Type Nb3Sn Nb3Sn

　　　　　　

Minimum Piece Length 1,000m 1,000m

Cr-plated Strand Dia 0.82 ± 0.005mm 0.82 ± 0.005mm

Twist Pitch 15 ± 2mm 15 ± 2mm

Twist Direction Right Hand Twist Right Hand Twist

Cr Plating Thickness 2.0 +0/-1 ㎛ 2.0 +0/-1 ㎛

Cu/Non Cu Ratio 1.0 ± 0.1 1.0 ± 0.1 　

RRR > 100 > 100 Between 273 and 20K, after HT

Minimum Critical Current Ic ≥ 250A Ic ≥ 250A at 4.22K and 12T

n-value > 20 > 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

Nb3Sn Wire Specifica-tion

Strand Design Con-cept

R-Billet

NM NNb NF Ns NTa

SC Strand for CS

Cond.

19 176 3,344 30 1

2㎛

Homogeneity of Cr plating thick-ness

NbTi Wire

ITEM WIC Round Rectangular

Shape `

Piece Length < 8,000m < 8,000m < 8,000m < 8,000m < 8,000m < 4,000m < 4,000m

Dimension 1.7 x 2.6mm 2.5 x 3.0mm 0.5~2.0mm0.5~2.0mm0.5~2.0mm > 1.0 x 1.0 > 1.0 x 1.0

Twist Pitch 60mm±20% 60mm±20%60mm±20

%60mm±20

%60mm±20

%N/A N/A

Twist Direction Right Hand Right Hand Right Hand Right Hand Right Hand N/A N/A

Insulation type

Braid Braid Braid Braid Braid Braid Braid

Cu/NonCu 7 10 10 4 1 10 4

RRR > 80 > 80 > 80 > 80 > 80 > 80 > 80

Jc (A/mm2) > 3000 @4T > 3000 @4T> 3000

@4T> 3000

@4T> 3000

@4T> 3000

@4T> 3000

@4T

n-value > 30 @5T > 30 @5T > 30 @5T > 30 @5T > 30 @5T > 30 @5T > 30 @5T

Solder Lead Free Lead Free N/A N/A N/A N/A N/A

NbTi Wire Specifica-tion

2 3 4 5 6 70

1000

2000

3000

4000

5000

6000Jc

(A

/mm

2)

Fie ld (T)

KAT7.0 EAS6.5 ALS6.4 LUV6.6

Comparison of Jc Perfor-mance

MgB2 Wire

Performance Unit Current

Jc (@4.2K, 3T) A/cm2 1 ×105

Diameter Φ 1.1

Module ea 6

Length km 1

Company Columbus Hypertech Hitachi WST KAT

Country Italy USA Japan China Korea

Process Ex-situIn-situ

(CTFF)

In-situ

(IMD)

Drawing &

RollingIn-situ

Wire

design

Diameter (Φ) 1.13 0.7~0.9 1.5 <1 <1

No. of fila. 37, 61 19, 36, 61 37 6, 36 6, 18, 36

S. Fraction(%) 17~20 13~18 18 18 20~25

Length (km) 3~4 6 1 1.2 8

Performance

Jc (A/cm2) 240,000 110,000 80,000 200,000 200,000

측정자장 (T) 1 2 5 3 2

측정온도 (K) 20 20 4.2 4.2 20

MgB2 Wire Specification Target

Current KAT Achievement

MRI Magnet

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 (KAT15B]

KEY PERFORMANCE

940mm

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%

1.5T MRI MAGNET (KAT15C]

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

3.0T MRI MAGNET (KAT30A]

Magnet components

Role

Magnetic field

Protection from Quench

Main Parts

Superconducting Coil

Superconducting Joint

Permanent switch

Sensor (Temp, Lhe)

Protection circuit

Voltage meter

Superconducting Mag-net

Role

Liquid helium container

Main Part

Pressure vessel (ASME)

STST 304L

Suspension

Charcoal for vacuum

Helium Ves-sel

Role

Protection from Radiation heat

Main Parts

Aluminum vessel (A5083)

Suspension

MLI(Multi layer insulation)

Thermal Shield

Role

Vacuum container

Support magnet

Interface

Main Parts

Vacuum Can (STST 304L)

Vacuum Port

Cold Head Interface

Main Neck Turret

Outer Vacuum Can