Patent Number: 047956054
Section: claims

1. A nuclear fusion apparatus comprising: central support stay means;  a plurality of poloidal coils disposed in the circumferential direction of said central support stay means; and  a plurality of toroidal coils radially disposed around and adjacent to the central support stay means, said central support stay means including a central support stay portion and radial means for supporting said poloidal coils and for withstanding the centripetal force of said toroidal coils, said radial means comprising a plurality of radial portions extending radially from said central support stay portion and spaced circumferentially from each other at predetermined angles, each of said radial portions including a radial member radially extending from said central support stay portion and a force transmission member disposed at the radial outer end of said radial member for transmitting forces from at least two toroidal coils to each radial member.  central support stay means having a central support stay portion and a plurality of radial portions radially extending from said central support stay portion and circumferentially spaced from each other at predetermined angles, each of said radial portions including a movable radial member movably connected to the central support stay portion in the radial direction of the central support stay means;  a plurality of poloidal coils disposed in the circumferential direction of said central support stay means and supported by said radial portions, a groove for receiving at least one of the poloidal coils being formed at the radial outer end of each radial member; and  a plurality of toroidal coils radially disposed around the central support stay means and adjacent to the radial outer ends of said radial portions.  central support stay means having a central support stay portion and a plurality of radial portions radially extending from said central support stay portion and circumferentially spaced from each other at predetermined angles, said central support stay means being divided into a plurality of support stay members in the axial direction of the central support stay means whereby the central support stay portion and each radial portion are respectively divided into central support stay segments and radial segments, each of the support stay members having a through hole extending therethrough and said central support stay means further including a bolt inserted into the through hole of each of the support stay members and a nut screwed onto the bolt;  a plurality of poloidal coils disposed in the circumferential direction of said central support stay means and supported by said radial portions, each of said radial segments including an outer end surface and a step portion for receiving at least one of the poloidal coils, said step portion having a flat portion perpendicular to the axis of each support stay member and adjacent to the radial outer end surface; and  a plurality of toroidal coils radially disposed around the central support stay means and adjacent to the radial outer ends of said radial portions, each of said radial segments further including a portion for withstanding the centripetal force from each of the toroidal coils at the radial outer end of each radial segment. 2. A nuclear fusion apparatus as claimed in claim 1, wherein the number of radial portions equals the number of toroidal coils divided by an integer. 3. A nuclear fusion apparatus as claimed in claim 1, wherein said central support stay means is divided into a plurality of support stay members in the axial direction of the central support stay means, and said support stay members are fastened to each other by a fastener in the axial directions thereof, and each of said support stay members has a central support stay segment and a plurality of radial segments radially extending from the central support stay segment and circumferentially spaced from each other at predetermined angles, respectively forming said central support stay portion and said radial portions of the central support stay means, each of said radial segments having a step portion for receiving each of the poloidal coils. 4. A nuclear fusion apparatus as claimed in claim 1, wherein said central support stay members comprises a plurality of layers laminated to each other. 5. A nuclear fusion apparatus as claimed in claim 4, wherein said central support stay means comprises a plurality of layers laminated to each other in the circumferential direction of the central support stay means. 6. A nuclear fusion apparatus as claimed in claim 4, wherein each of said radial portions comprises a plurality of layers laminated to each other in the radial direction thereof. 7. A nuclear fusion apparatus as claimed in claim 1, wherein said central support stay means comprises a highly electrically resistant material. 8. A nuclear fusion apparatus comprising: 9. A nuclear fusion apparatus as claimed in claim 8, wherein said radial member is radially moved by the pressure of a liquid supplied into a space defined by said central support stay portion and said radial portions. 10. A nuclear fusion apparatus as claimed in claim 9 further comprising means for solidifying the pressurized liquid whereby the pressure applied to said radial members is maintained by the solidification of the pressurized liquid. 11. A nuclear fusion apparatus as claimed in claim 10 wherein said solidifying means includes means for super-cooling the pressurized liquid. 12. A nuclear fusion apparatus as claimed in claim 11 further comprising a heater disposed in at least one radial member whereby said solidified liquid is liquefied by said heater. 13. A nuclear fusion apparatus as claimed in claim 9 wherein the pressure applied to said radial members is held by a holder for holding each radial member in position with respect to the central support stay portion. 14. A nuclear fusion apparatus comprising: 15. A nuclear fusion apparatus as claimed in claim 14, wherein each of said support stay members has recessed and projected portions disposed on opposite end surfaces of each support stay member in the axial direction thereof and fitted into each other to integrate the adjacent support stay members with each other. 16. A nuclear fusion apparatus as claimed in claim 14, wherein said through hole extends through each of the support stay members such that the axis of the through hole is the same as the axis of each support stay member. 17. A nuclear fusion apparatus as claimed in claim 16, wherein means for preventing the adjacent support stay members from being relatively displaced in the circumferential direction thereof is disposed in each of the support stay members. 18. A nuclear fusion apparatus as claimed in claim 14, wherein said through hole extends through each support stay member such that the axis of each of said through holes is located on a concentric circle around the axis of each support stay member.