WECO04
IMP/CAS, Lanzhou, People's Republic of China
Jinping Underground Laboratory for Nuclear Astrophysics (JUNA) will take the advantage of the ultra low background and high current accelerator facility to study directly a number of important reactions at stellar energies, such as 25Mg(p,γ)26Al, 19F(p,α)16O, 13C(α,n)16O, and 12C(α,γ)16O reactions. As a key component of high current accelerator facility, the performance of ion source has a very important effect on the beam quality. In order to produce the requested 10 emA H+, 10 emA He+ and 2.5 emA He2+ at the exit of low energy beam transport (LEBT) line, an intense 2.45GHz ECR ion source operated at the maximum energy of 50keV/q will be developed for JUNA project. The ion beam extracted by a 3-electrode extraction system passes through a low energy beam transport system, which is composed of identical solenoids and dipole magnet, into the entrance of acceleration tube (AT). In this paper, the main technique risks, physics design of the ion source and LEBT will be discussed. The progress of the ion source and LEBT, such as mechanical design, magnetic elements, beam diagnostic units of LEBT and development of ion source will be introduced.
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