Effective Leak Detection for HIRFL-SSC Vacuum System

• 作者: You Zhiming Ma Xiangli Hao Chaoying
• 来源期刊: 近代物理研究所和兰州重离子加速器实验室年报：英文版
• 学科: 工学
• 关键词: 兰州重离子加速器 高真空系统 南南合作 检漏 宾夕法尼亚州 运行效率 冷冻水泵 国家实验室
• 年，卷（期）: 2004,（1）
• 页码范围: 150
• 页数: 1页
• 分类号: TB753.2

摘要

<正>In recent years, the vacuum degree of SSC chamber hasn't been reached ideal value all along. In the condition of running two HIRFL-800 cryo-pumps, the pressure of vacuum system still kept in the level of 10-4 Pa. For this reason, the HIRFL national laboratory determined to transform SSC vacuum chamber. At first, we had to find the leak sources of the system, knowing the affection to the vacuum degree of the chamber. Water ingredient was detected very high in vacuum system by quadrupole mass spectrometer, it meant the big leaks being in the system. We used the pause time of accelerator to detect leak sources. After leak points were found and repaired, not only the pressures of the system were decreased, but also the cryo-pumps running efficiency was improved.