AC Loss Performance of Cable-in-Conduit Conductor-Influence of Cable Mechanical Property on Coupling Loss Reduction-

Investigation of long time constants of magnetic fields generated by the JT-60SA CS1 module

“…In a coil wound with CIC conductors, the length of which is over several tens of meters, loop currents have been observed in the past [6,[16][17][18][19][20][21]. On the other hand, in a short CIC conductor, the length of which was approximately 1 m, there is no observation of the loop currents [22].…”

Magnetic field measurements of JT-60SA CS model coil

“…Calculated and measured magnetic fields in the radial direction at  = 0 • and z = 18.1 mm in the model coil. Nb3Al insert [16] Magnetic field meas. 5000 s Magnetization 1000 s LHD-IV [18] Calorimetry 124 s LHD-IS [22,23] Magnetic field meas.…”

“…The first instance is an SMES model coil for a small-scale 100 kWh SMES device, which was launched by the Ministry of International Trade and Industry of Japan [7,10,11]. The second and third are the CS insert and Nb 3 Al insert coils, respectively [12][13][14][15][16]. These coils were fabricated and tested by the Japan Atomic Energy Research Institute.…”

“…The fifth is the inner shaping (IS) coil for the LHD poloidal coil [19,20]. Specifications of these coils are listed in Table 4 [7,[10][11][12][13][14][15][16][17][18][19][20].…”

“…The longest measured time constants of these five instances and that of the JT-60SA CS model coil are listed in Table 5 [7,11,13,16,18,[21][22][23]. Each coil has an inherent time constant because the coils are composed of several different strands, conductors, and configurations, as listed in Tables 1, 2 and 4.…”