DC performance measurement and assessment of Nb3Sn Cable-In-Conduit Conductor for CFETR CS model coil

Shi, Yi; Liu, Fang; Liu, Huajun; Qin, Jinggang; Hao, Qiangwang; Liu, Bo; Jin, Huan; Yu, Ming; Wang, Yu

doi:10.1016/j.fusengdes.2017.10.019

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…The area where the two legs are in close to each other will reach the maximum magnetic field. Therefore, the conductors generate a self-induced magnetic field during electromagnetic testing, which adds to the background magnetic field into forming the final magnetic field [25,47]. The magnetic field in total was calculated by:…”

Section: Experimentations On New Ciccsmentioning

confidence: 99%

High performance of an innovative cable-in-conduit conductor with CWS cable pattern

Guo,

Liu,

Dai

et al. 2024

Supercond. Sci. Technol.

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Cable-in-conduit conductors, known as CICCs, were developed for constructing superconducting coils in tokamak fusion reactors. To achieve large currents in high magnetic field, CICCs were utilized with a short-twist-pitch (STP) cable pattern to prevent irreversible performance degradation, but also inducing higher AC losses. Institute Of Plasma Physics Chinese Academy Of Sciences (ASIPP) designed and manufactured three innovative CICCs, all featuring CWS (copper wire with a short-twist-pitch wound around superconducting strands with a long-twist-pitch) structure to increase both the current density and structure stiffness of CICC cable. These CICCs had the same new CWS cable pattern but the Nb3Sn superconducting strands were from different suppliers. All samples were subsequently tested under electromagnetic cycling tests in SULTAN. For similar electromagnetic performance degradation, the Lorentz load threshold of the CWS cable pattern exhibited to be higher than that of STP cable pattern. Moreover, the AC losses of CWS were 15% lower than that of STP cable pattern for low frequencies of the applied alternating magnetic field. Both results indicated that the CWS cable pattern has a higher margin of engineering safety and lower AC losses than STP cable pattern under the target operating conditions. This provides new insights in finding solutions for optimizing the CICCs’ cable pattern and preventing its electromagnetic performance degradation.

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Section: Experimentations On New Ciccsmentioning

confidence: 99%

High performance of an innovative cable-in-conduit conductor with CWS cable pattern

Guo,

Liu,

Dai

et al. 2024

Supercond. Sci. Technol.

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show abstract

“…For the cable layout the short twist pitch (STP) design recommended by The French Alternative Energies and Atomic Energy Commission (CEA) is chosen for the CFETR-CSMC conductor because of the better transport performance against cyclic electromagnetic (EM) force loading through an optimization analysis and the test for ITER Nb 3 Sn conductors [4], [5]. The successful testing of the Nb 3 Sn CICC short sample for the CFETR-CSMC in SULTAN has been performed in the spring of 2016 and stable transport performance against cycles is obtained [6].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Electrical Properties of a CFETR CSMC Conductor Under Transverse Mechanical Loadings

Shi

Qin

Wang

et al. 2018

IEEE Trans. Appl. Supercond.

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The central solenoid model coil (CSMC) project of the China Fusion Engineering Test Reactor was launched in 2014 to verify the technological feasibility of a large-scale superconducting magnet at the Institute of Plasma and Physics Chinese Academy of Sciences. The short twist pitch design recommended by CEA is chosen for the CSMC Nb 3 Sn cable-in-conduit conductors. In order to better understand the evolution of transport properties and coupling losses related to the effect of electromagnetic load cycles, the mechanical and electrical properties were measured and investigated employing a special cryogenic press facility for the transverse mechanical loadings. The results show that the transverse compression (d y) versus applied load force (F y) is different from first to subsequent loading cycles. This mechanical behavior can be interpreted by the combination of strands bending between the crossovers and strands deformation at the crossovers. The fitting relations of d y versus F y are also presented. The evolution of interstrand contact resistance (R c) in the cabling stages with cyclic history and pressure effects are discussed. In addition, a fitting relation of R c versus F y is presented based on a combination of strand's microsliding and copper matrix resistivity. A clear correlation between intrapetal resistance R c and coupling loss is also found.

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Quench Detection Design for CFETR CSMC

Wang

Liu

et al. 2018

Fusion Science and Technology

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DC performance measurement and assessment of Nb3Sn Cable-In-Conduit Conductor for CFETR CS model coil

Cited by 4 publications

References 14 publications

High performance of an innovative cable-in-conduit conductor with CWS cable pattern

High performance of an innovative cable-in-conduit conductor with CWS cable pattern

Mechanical and Electrical Properties of a CFETR CSMC Conductor Under Transverse Mechanical Loadings

Quench Detection Design for CFETR CSMC

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