Calculation of AC Losses of CICC for Superconducting Outsert Coils in a Hybrid Magnet

<正> This paper is devoted to predict AC loss of cable in conduit conductor (CICC) whichis of importance in the design of conductors. The consideration for the conductor's design and mainparameters for the magnets are introduced. In order to attain a good accuracy in the calculation ofAC losses, the field distribution within superconducting outsert should be considered. Calculationof the AC losses, including hysteresis losses and coupling losses, is conducted. An emphasis is puton the hysteresis loss during the ramp up of the current to the operational current (15.3 kA) andthe coupling loss of the conductor in a power-down condition for insert. The results are obtainedto be 74.9 kJ and 950 J for 40 T hybrid magnets, respectively. Based on the calculation, a briefanalysis of losses effect on the conductor design and the operation of magnet is given for thepurpose that the capacity of the cryogenertor can be evaluated and the stability regime can beimproved in our future work on the hybrid magnets.