title: The R&D progress of 4 MW EAST-NBI high current ion source.
abstract: A high current ion source, which consists of the multi-cusp bucket plasma generator and tetrode accelerator with multi-slot apertures, is developed and tested for the Experimental Advanced Superconducting Tokamak neutral beam injector. Three ion sources are tested on the test bed with arc power of 80 kW, beam voltage of 80 keV, and beam power of 4 MW. The arc regulation technology with Langmuir probes is employed for the long pulse operation of ion source, and the long pulse beam of 50 keV @ 15.5 A @ 100 s and 80 keV @ 52A @ 1s are extracted, respectively.
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
authors.forename: Yahong
authors.initials: Y
authors.lastname: Xie
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
authors.forename: Chundong
authors.initials: C
authors.lastname: Hu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
authors.forename: Sheng
authors.initials: S
authors.lastname: Liu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
authors.forename: Yongjian
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
authors.forename: Lizhen
authors.initials: L
authors.lastname: Liang
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
authors.forename: Yuanlai
authors.initials: Y
authors.lastname: Xie
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Sheng
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
authors.forename: Caichao
authors.initials: C
authors.lastname: Jiang
authors.affiliation: Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China.
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Liu