superconducting magnets, cryogenic system

作者:宗占国;刘立强;熊联友;李少鹏;徐庆金;何昆;张亮;高杰;
关键词:BEPCⅡ, superconducting magnets, cryogenic system
单位:Technical Institute of Physics and Chemistry,Chinese Academy

of Sciences;Institute of High Energy Physics,Chinese Academy of

Sciences;
摘要:In the upgrade project of the Beijing Electron Positron

Collider (BEPCⅡ), three superconducting magnetic materials magnets are employed to

realize the goal of two orders of magnitude higher luminosity. A

cryogenic system with a total capacity of 0.5 kW at 4.5 K was

built at the Institute of High Energy Physics (IHEP) to support

the operations of these superconducting devices. For preparing

the commissioning of the system, http://www.999magnet.com the refrigeration process was

simulated and analyzed numerically. The numerical model was based

on the latest engineering progress and focused on the normal

operation mode. The pressure and temperature profiles of the

cryogenic system are achieved with the simulation. The influence

of the helium mass flow rates to cool superconducting magnets on

the thermodynamic parameters of their normal operation is also

studied and discussed in this paper.