Design of Bepcii Vacuum Antechamber

As a principle part of BEPCII storage rings,antechamber is connected to vacuum pump,photon absorber,BPM,magnet and so on.It's design and manufacture is crucial factor in carrying out of BEPCII.It put forward a scheme of antechamber's structure and analyzes antechamber's property in vacuum state with finite element method.The trial-manufacture of antechamber justifies the design.Now antechamber has been produced in batches.