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Contribution Oral

H– and D– sources for fusion, accelerators and other applications

Performance of Radio frequency plasma generator for neutral beam injector


  • Dr. Yahong XIE

Primary authors

  • Dr. Yahong XIE (Institute of Plasma Physics, Chinese Academy of Sciences)



The China Fusion Engineering Test Reactor (CFETR) is a next generation fusion device towards the using of fusion energy. The main machine of CFETR and the auxiliary plasma heating tools including the Neutral beam injector (NBI) were under design. The high power ion source is the most precision and important part of NBI.
A negative ion source was designed for the key technology study and performance tests of hgih power ion source. The plasma generator contains a RF driver and a expansion chamber. The diameter of driver is 20 cm and the height is 15cm. Six turns of external coils was used for the plasma generation. A matching unit was design to transfer the RF power (100kW @ 1MHz) to the coils. Several diagnostic tools were used for the plasma parameters measurement. The RF plalsma generator was tested with high density plasma generation and long pulse operation. The details of experimental results will be presented in this paper.