International thermal-nuclear experimental reactor and China fusion engineering testing reactor

to be built in the future

will run in the transient complex magnetic field with the large current quick exciting

which makes the conductor on the center spiral magnet suffer the impact of the magnetic field above 10 T.So

the Nb

3

Sn material has been used.However

for the Nb

3

Sn-based conductor

research of the critical performance degradation due to strain is still inadequate.Especially

it is lack of the experimental analysis study of the influence of the twist pitch and contact characteristics on coupling loss.Therefore

by simulating strain with the cyc

le load

the effect exploration of coupling loss is carried out with the different cabling sequence ratio and a contact resistance.Compared with calculation models of classical coupling loss and the spectrum loss

the coupling loss error with the combination model of conductor cabling sequence ratio and contact resistance is small

the combination model calculation is the closest to the measured value.The result shows that the calculation technology of the cabling sequence ratio and contact resistance can obtain satisfactory result.