摘要
旨在降低氦蒸发率的双级ＧＭ制冷机在磁共振成像低温恒温器中应用已有１０多年的历史。本文介绍了美国ＡＰＤ低温公司应用ＧＭ制冷机冷却磁共振成像低温恒温器冷屏的经验。实践表明，应用这种制冷机，低温恒温器加注液氦的间隔期及维修期延长了，操作可靠性提高，使用成本降低了。
GM-type refrigerators have been used for over 10 years on magnetic resonance imaging cryostats for the purpose of reducing the helium boiloff rate. This paper describesthe experience that APD Crogenics has applied Displex GM-type refrigerators for cooling the cold shieds on magnetic resonance imaging cryostats. The experience showed that using this kind of refrigerators, the interval of refilling the cryostat with liquid helium and the interval of maintenances have been extended, the operating reliability is improved and the lifetime cost is reduced.
出处
《低温工程》
CAS
CSCD
1996年第1期12-16,共5页
Cryogenics
