| 摘要 |
PURPOSE:To realize a mechanically tough lead with an excellent cooling feature for service in a cryogenic unit by a method wherein a number of pipes composed of a conductive metal are intertwined, inserted into an outer casing, the vacancy in the outer casing is filled dense with a conductive filler, and the pipes serve as paths for a coolant. CONSTITUTION:A number of pipes 1 made of a conductive metal and circular in cross section are plated with solder, intertwined tight, inserted into a cylindrical outer casing 2, and molten conductive metal is poured into and fills up the vacancy in the outer casing 2. Solder coating on the pipes 1 and on the inner walls of the outer casing 2 melts, and is allowed to cool, for the unification of the pipes 1, outer casing 2, and the filler 3. The pipes 1 provide coolant paths 4, and an normal temperature terminal 5 and cryogenic terminal 6 are installed on both sides of the outer casing 2. A coolant,helium gas for example, is caused to travel through the coolant paths 4 in the pipes 1, absorbing heat from the inner walls of the pipes 1. With the coolant inside the lead traveling in spiral, the lead of this design is cooled more effectively than a multi-finned lead. |
