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本文描述了BEPCⅡ储存环真空系统的结构、特点以及运行状况。储存环真空系统于2006年3月开始安装,仅用8个月时间完成储存环正、负电子环约480米长的真空设备安装、检漏和烘烤,并且每个区段的真空优于6.0×10-8Pa。2006年11月18日电子束在储存环成功储存,标志着储存环真空系统能够正常运行。随着积分流强的增加,由同步辐射光引起的气体解吸量逐渐减小,动态真空变好。当积分流强达到100A·hr时,单位流强引起的压强上升小于1×10-10Pa/mA。真空系统运行稳定,在8个多月的运行中,没有发生真空设备故障。
This article describes the structure, characteristics and operating conditions of the BEPC II storage ring vacuum system. The storage ring vacuum system was installed in March 2006, and the storage ring positive and negative electron rings were installed, leak tested and baked in about 480 meters in just 8 months, and the vacuum in each segment was superior to 6.0 × 10 -8 Pa. November 18, 2006 Electron beams are successfully stored in the storage ring, marking the normal operation of the storage ring vacuum system. As the integral flow increases, the desorption amount of gas caused by synchrotron radiation gradually decreases and the dynamic vacuum becomes better. When the integral flow reaches 100 A · hr, the pressure rise caused by the unit flow is less than 1 × 10 -10 Pa / mA. The vacuum system was stable and no vacuum equipment failure occurred during more than 8 months of operation.