UNIST-EBIT vacuum and confinement system (with simulations)

Intense Beam and Accelerator Laboratory(IBAL) at Ulsan National Institute of Science and Technology(UNIST) is building a miniaturized Electron Beam Ion Trap(mini-EBIT) for the spectroscopy of the highly charged ions(HCIs). The compact, easily portable table-top mini-EBIT, which has the vacuum level of $\pmb{10^{\wedge}\{-10\}}$ mbar confines the electron impact ionized atoms in both longitudinal and radial directions using the electric and magnetic fields respectively. The mini-EBIT with an on-axis electron gun which generates up to 8 keV energy-tunable electron beam, and a 0.86 T room-temp permanent magnets, allows us to do the X-ray spectroscopy of the HCIs in a cost effective and low maintenance way. In this work, we present the overall vacuum structure of the EBIT with the simulations for the electron and ion confinements using the COMSOL and SIMION.