Speaker
Prof.
Chundong Hu
(Institute of Plasma Physics, Chinese Academy of Sciences)
Description
Neutral beam injector (NBI) is an effective plasma heating and driving method for fusion sciences research. The China Fusion Engineering Test Reactor (CFETR) is under design and will be developed in the near future. In order to support the development of CFETR, a negative ion based neutral beam injector was under design. The ion source is the most precision and important part of NBI. A negative ion source test bed was developed in the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP).
The negative ion source test bed contains of two 1MHz RF frequency power with 50 kW and 100kW respectively, a dummy load, a bias power supply and an ion extraction power supply (16kV @ 20A), a matching unit with high voltage transformer, a vacuum chamber, gas inlet system ang gas pumping system, which is shown in Fig.1. Several diagnostic tools was employed for the plamsa parameters measurement, such as the Langmuir probe, the microwave interferometer, the optical emission spectrometer (OES), cavity ring-down spectroscopy system (CRDS), the thermocouple system (TC) and water flow calorimeter system (WFC).
The negative ion source was designed and tested on the test bed. It contains the RF based plasma generator and negative ion accelerator. There are several types of RF plasma generator developed, such as single driver source, double source and larger area driver source. The negative ion accelertor was design and prelimary tested too. The details of the negative ion source test bed and the experimental results of RF plasma generator and the negative ion beam extraction will be presented.
Primary author
Prof.
Chundong Hu
(Institute of Plasma Physics, Chinese Academy of Sciences)
Co-authors
Dr
Caichao Jiang
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Jianglong Wei
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Lizhen liang
(Institute of Plasma Physics, Chinese Academy of Sciences)
Ms
Meichu huang
(Institute of Plasma Physics, Chinese Academy of Sciences)
Mr
Qinglong cui
(Institute of Plasma Physics, Chinese Academy of Sciences)
Mr
Shiyong chen
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Yahong xie
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Yongjian xu
(Institute of Plasma Physics, Chinese Academy of Sciences)
Dr
Yuanlai xie
(Institute of Plasma Physics, Chinese Academy of Sciences)
Mr
Yuming gu
(Institute of Plasma Physics, Chinese Academy of Sciences)
