| 摘要 |
PURPOSE: To provide a proportional counter tube provided with a beryllium window joined to an outer tube with a silver solder having little deformation by supporting a beryllium film which is softened at soldering with the silver solder by a reinforcing member at the exhaust of the outer tube. CONSTITUTION: An outer tube 10 is provided with a beryllium window 30, a reinforcing member 40, and a linear anode 50. The outer tube 10 is composed of an almost cylindrical tubular wall 11 and flanges 12 and an open part 20 through which radiant rays to be detected enter is formed in the tubular wall 11. The flanges 12 are made of an insulator and insulate the outer tube 10 which works as a cathode and the anode 50 while keeping air-tightness of a proportional counter tube. As for the window 30, a Be thin film covers the member 40 and the open part 20. Moreover, the window 30 is jointed to the tubular wall 11 with a silver solder and consequently, the window 30 is electrically connected with the tubular wall 11, that is a cathode. The member 40 is set between the window 30 and the open part 20 and supports the window 30 and joined to the tubular wall 11 and the window 30 with the silver solder. |
