Test of an 8.66-T REBCO Insert Coil With Overbanding Radial Build for a 1.3-GHz LTS/HTS NMR Magnet
2016 · IEEE Transactions on Applied Superconductivity
저자
Timing Qu, Philip C. Michael, Juan Bascuñán, Thibault Lécrevisse, Mingzhi Guan, 한승용 (Seungyong Hahn), Y. Iwasa
연구주제
Superconducting Materials and Applications · Particle accelerators and beam dynamics · Magnetic confinement fusion research
NTIS 과학기술표준분류
에너지/자원만에너지·환경·원자력 확장
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AI 연구 키워드·방법
무절연 코일(NI 코일) NMR 자석 오버밴딩(외곽 보강 밴드)
키워드 (OpenAlex)
high-temperature superconducting magnets low-temperature superconducting magnet NMR magnets pancake coils critical current field homogeneity residual field 304 stainless steel
초록
A 1.3-GHz/54-mm LTS/HTS NMR magnet, assembled with a three-coil (Coils 1-3) 800-MHz HTS insert in a 500-MHz LTS NMR magnet, is under construction. The innermost HTS insert Coil 1 has a stack of 26 no-insulation (NI) double pancake (DP) coils wound of 6-mm-wide and 75-μm-thick REBCO tapes. In order to keep the hoop strains on REBCO tapeopof 250 A and in a field of 30.5 T, we overbanded each pancake in Coil 1 with a 6-mm-wide, 76-μm-thick 304 stainless steel strip: 7-mm-thick radial build for the central 18 pancakes, while 6-mm-thick for the outer 2 × 17 pancakes. In this paper, Coil 1 was successfully tested at 77 K and 4.2 K. In the 77-K test, the measured critical current was 35.7 A, determined by an E-field criterion of 0.1 μV/cm. The center field magnet constant decreased from 34.2 to 29.3 mT/A, when Iopincreased from 5 to 40 A. The field distribution at different Iopalong the z-axis …
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교수 1
연구주제 1
Superconducting Materials and Applications
정책분야 1
키워드 3
무절연 코일(NI 코일) · NMR 자석 · 오버밴딩(외곽 보강 밴드)