Earticle

초록

영어

European efforts to design superconducting conductors for a future tokamak have involved Nb3Sn cable-in-conduit conductor (CICC). Nb3Sn coils which undergo heat treatment to activate the Nb3Sn material are mostly produced through the wind-thenreact route. However, some Nb3Sn coils have been proposed with CICCs of the react-then-wind route. The latter CICCs are physically constrained due to handling limitations which if not adhered to will result in irrecoverable damage to the Nb3Sn cable inside, nullifying any performance advantage. A group at the Swiss Plasma Center has proposed such CICC designs, constructing samples and testing them for performance. The characteristics and performance of these react & wind (R&W) CICCs are compared with the more common wind & react (W&R) CICCs, and it is found that the R&W designs show more extreme characteristics than typical W&R Nb3Sn CICCs for some parameters that are known to influence CICC performance. Where the R&W CICCs extend the range of those parameters, they also continue trends formed by the W&R CICCs with the parameters. The main observation, however, is that although the current sharing temperature performances of the R&W samples are above the average of the W&R samples they were compared to, they are not the highest. A similar observation applies to a cost comparison of the superconducting material where the R&W CICCs are found to be relatively cheap but not the cheapest. Given these results, clear practical advantages to the R&W CICC design is not evident.

목차

Abstract
1. INTRODUCTION
2. THE EU-DEMO R&W TF CICC DESIGNS
2.1. Overall Approach
2.2. The Fabricated Samples
2.3. Performance Testing
3. COMPARISON WITH W&R Nb3Sn CICCs
3.1. The W&R Nb3Sn CICC samples
3.2. Tcs versus Strand Ic and Iop/Ic
3.3. Tcs versus First Stage Sub-cable Twist Pitch
3.4. Tcs versus Void Fraction
3.5. Tcs versus Aspect Ratio
4. CICC COST COMPARISONS BY DESIGN
4.1. CICC Cost Estimation
4.2. Cost Comparison Results
5. CONCLUSIONS
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• Soun P. Kwon [ Korea Institute of Fusion Energy, Daejeon, Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537