UHV SYSTEM IN SHANGHAI EBIT CRYO-SUPERCONDUCTION CHAMBER

The vacuum system design of Shanghai EBIT cryo-conduction segment is reported.Sputter ion pump and condensation surface are desirable to serve as pumping system.Vacuum system test results indicates ultimate pressure in outermost region achieve 10^-6 Pa in warm condition and 10^-8 Pa in cold condition.Pressure in the ion trap is evaluated by establishing gas flow model.It is predicated to be 10^-10 Pa that meet physical demands.