| 摘要 |
<p>Two pair of thermal shield axial supports (87) are provided. Each support includes a strand of wire (91) brazed on either end into threaded studs (93,95). One stud (95) is threaded into a topped hole in a ring (23) on the end of the magnet cartridge (17). The stud (93) on the other end extends through a clearance hole on the end flange of the thermal shield (21). Belleville spring washers (101) are compressed against the shield by a nut (103). Prior to cool down, the Belleville washers are compressed. As the shield and magnet cool down, the shield contracts axially with respect to the magnet cartridge, thus relaxing the washer stack compression. The wire tension relaxes from the maximum pretension to a nominal tension at operating temperature. <IMAGE></p> |
