Commissioning progress of LEAF at IMP

A Low Energy high-intensity high-charge-state ion Accelerator Facility (LEAF), which mainly consists of a 45 GHz superconducting ECR ion source, LEBT and a 81.25 MHz 4-vane RFQ, was designed to produce and accelerate heavy ions, from helium to uranium with A/Q between 2 and 7, to the energy of 0.5 MeV/u. The typical beam intensity is designed up to 2 emA CW for the uranium beam. The project was launched in 2015 and has been successfully commissioned with He+ (A/Q=4), N2+ (A/Q=7) beam and accelerated the beams in the CW regime to the designed energy of 0.5 MeV/u. Beam commissioning results of He+ beam have been reported previously. This paper presents the details of N2+ commissioning and beam studies.