首页|Minimum quench energy analysis for Six-Around-One HTS cable-in-conduit conductor
Minimum quench energy analysis for Six-Around-One HTS cable-in-conduit conductor
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NETL
NSTL
Elsevier
The Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP) has designed a Six-Around-One cable-in- conduit conductor (CICC) for next-generation nuclear fusion devices in China. This complex design involves intricate heat exchanges among conductor components and considerations of structural stability, necessitating multiple design iterations. The minimum quench energy (MQE) is a crucial parameter for evaluating the CICC's stability and feasibility under operational conditions of low temperatures (4.2 K) and high magnetic fields (20 T). This study has analyzed the MQE of the Six-Around-One CICC using the THEA code, employing a onedimensional model with three thermal and four hydraulic components. To reduce the calculation error of the theoretical model, the helium flow channel of the CICC structure is divided into four areas, and the friction of each flow channel is tested by measuring the inlet and outlet pressures of CICC and its mass flow rate. The four flow channels are the REBCO tapes area, the central spiral tube area of the sub-cable, the gap area between the sub-cable and the jacket, and the central copper tube area. Based on this model, the MQE of the CICC under fast perturbation (0.01 m, 0.1 s) and slow perturbation (10 m, 30 s) conditions is first analyzed. Then, the effect of changes in key parameters in CICC on stability is studied, including thermal resistance (Rth), the mass flow rate of forced helium, the cross-sectional area of copper, and the residual resistivity ratio (RRR) of copper material. By studying the dependence of MQE on various thermal and hydraulic parameters, the key factors of CICC design are determined, and the general design principles of HTS CS coil CICC are proposed. Numerical simulation can reduce the workload in the CICC design process and shorten the overall design cycle.
REBCOCable-in-conduit conductor (CICC) THEAMinimum quench energy (MQE)StabilityMODEL
NETL
NSTL
Elsevier
