| 摘要 |
861,725. Nuclear fusion reactors. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. June 29, 1959 [July 10, 1958], No. 22168/58. Class 39(4). In gas discharge apparatus comprising a metallic surface exposed to the discharge, the surface is formed of a plurality of closelyspaced, mutually insulated, thin metallic plates mounted substantially edge-on to the discharge, the edge dimensions and spacing of the plates being such that the effective area of each plate exposed to the discharge is less than that required to maintain a unipolar arc. In one example, Fig. 1, a nuclear fusion apparatus comprising a metal torus 2 is provided with a liner comprising a number of flat metal rings 3 separated by insulating spaces 4. The inner edges of the rings may be bent slightly as shown at 5 to screen the spacers from the discharge, and the liner may be gastight and serve as the containing vessel for the fuel gas. To further reduce the area of each surface exposed to the discharge, each ring may be divided by radial slots into a number of segments. In another example, Fig. 4, the liner is made up of a number of sections each comprising two stainless steel rings 7a, 7b joined together by four alumina insulators, of which two, 8b, 8d, are shown in Fig. 4. Plates 10a, 10b are secured to the rings but insulated from them, and alumina rods 14 carrying plates 15 separated from each other by insulators extend between plates 10a, 10b. The inner edges of plates 10a, 10b, 15, form the inner boundary of the liner. Specifications 830,252 and 838,551 are referred to. |
