S. H. Park, Y. Chu, Y. O. Kim, H. Yonekawa, Y. B. Chang, I. S. Woo, H. J. Lee, K. R. Park
언어
영어(ENG)
URL
https://www.earticle.net/Article/A176280
※ 기관로그인 시 무료 이용이 가능합니다.
※ 학술발표대회집, 워크숍 자료집 중 4페이지 이내 논문은 '요약'만 제공되는 경우가 있으니, 구매 전에 간행물명, 페이지 수 확인 부탁 드립니다.
4,000원
원문정보
초록
영어
The superconducting coil system is one of the most important components in Korea Superconducting Tokamak Advanced Research (KSTAR), which has been operated since 2008. Nb3Sn and NbTi superconductors are being used for cable-in-conduit conductors (CICCs) of the KSTAR toroidal field (TF) and poloidal field (PF) coils. The CICCs are cooled by forced-flow supercritical helium about 4.5 K. The temperature, pressure and mass flow rate of the supercritical helium in the CICCs are interacting with each other during the operation of the coils. The complicate behaviors of the supercritical helium have an effect on the operation and the efficiency of the helium refrigeration system (HRS) by means of, for instance, pressure drop. The hydraulic characteristics of the supercritical helium have been monitored while the TF coils have stably achieved the full current of 35 kA. In other hands, the PF coils have been operated with various pulsed or bipolar mode, so the drastic changes happen in view of hydraulics. The heat load including AC loss on the coils has been analyzed according to the measurement. These activities are important to estimate the temperature margin in various PF operation conditions. In this paper, the latest hydraulic behaviors of PF coils during KSTAR operation are presented.
목차
Abstract 1. INTRODUCTION 2. KSTAR SUPERCONDUCTING MAGNET 3. HYDRAULIC BEHAVIORS 3.1 . Pressure gradient 3.2. Friction factor 3.3. Measurement in real coil system 3.4. Temperature variation due to current ramp rate 3.5. Quench detection 4. CONCLUSIONS REFERENCES
저자
S. H. Park [ KSTAR research center, National Fusion Research Institute, Daejeon, 305-333, Korea ]
Corresponding Author
Y. Chu [ KSTAR research center, National Fusion Research Institute, Daejeon, 305-333, Korea ]
Y. O. Kim [ KSTAR research center, National Fusion Research Institute, Daejeon, 305-333, Korea ]
H. Yonekawa [ KSTAR research center, National Fusion Research Institute, Daejeon, 305-333, Korea ]
Y. B. Chang [ KSTAR research center, National Fusion Research Institute, Daejeon, 305-333, Korea ]
I. S. Woo [ KSTAR research center, National Fusion Research Institute, Daejeon, 305-333, Korea ]
H. J. Lee [ KSTAR research center, National Fusion Research Institute, Daejeon, 305-333, Korea ]
K. R. Park [ KSTAR research center, National Fusion Research Institute, Daejeon, 305-333, Korea ]