重离子回旋加速器中高频腔体的冷却系统,是采用φ16×1mm的磷脱氧铜管压成8×20.5mm的扁管,与板厚为2mm、3mm的导电铜板的钎焊结构。要求钎缝的铺展面积达90％以上。焊后管子需经水压疲劳试验(0.5M Pa,50次)以及气密试验(1.5MPa),钎后构件的出气率小于8×10~(-10)T·L/s·cm~2。 Heavy ion cyclotron high-frequency cavity cooling system is the use of φ16 × 1mm phosphorus deoxidized copper tube into 8 × 20.5mm flat tube, and the thickness of 2mm, 3mm conductive copper brazing structure. Required brazing seam spreading area of ​​more than 90%. After welding, the pipe should be subjected to hydrostatic fatigue test (0.5M Pa, 50 times) and airtight test (1.5MPa), and the outgas rate of the post-brazing component should be less than 8 × 10 -10 T · L / s · cm ~ 2 .