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46     Fundamentals of Magnetic Thermonuclear Reactor Design


































            FIGURE 3.5  The magnet system. (Copyright ITER Organization, 2017).





              TABLE 3.4 Main Parameters of the Magnet System
              Parameters                   TF coils    CS coils  PF coils
              Number of coils              18          6        6
              Number of turns in a coil (section)  134  549     459–1,155
              Stored magnetic field energy (GJ)  41    7        4
              Maximum operating current (kA)  68       45       45
              Maximum magnetic field (T)   11.8        13.0     6.0
              Conductor’s total length (m)  82,260     36,114   633,142
              Coil’s total weight, incl. case and   298 a  954  2,163
              mechanical structure (t)
              Superconductor’s total weight (t)  410   104      2,240
              Superconductor’s total length (m)  4,570  6,019   6,009–14,067
              Conductor piece length (m)   415–760     601–903  387–879
              Liquid helium mass flow rate (g/s)  8    8        14–88
              a Weight of a single coil.
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