| 摘要 |
PURPOSE:To lessen the possibility of quenching occurring by arranging the constitution such that helium gas does not stay within the cooling duct provided between layers or between them and a bobbin so as to cool a superconducting coil. CONSTITUTION:Helium gas, which is created by the evaporation of the liquid helium filled up in a cooling duct 31A as a cooling medium, can go up along an oblique spacer 31A by forming the spacer 31A and the cooling duct 41A between the cylindrical section 11 of bobbin 1 and an inner coil into the shape of oblique spirals to the symmetrical axis, so there is no trouble such as that the helium gas stays partially and the temperature of superconducting lead wire at that section goes up and quenching occurs. |
