| Title |
3D Numerical Simulation of Extraction of a Large-power Negative Ion Source |
| Authors |
- Z. Zhang, D.Z. Chen, D. Li, M.R. Pan, C. Zuo
Huazhong University of Science and Technology, State Key Laboratory of Advanced Electromagnetic Engineering and Technology,, Hubei, People's Republic of China
|
| Abstract |
The radio frequency (RF) driven negative hydrogen ion source is the reference source for the ITER neutral beam injection (NBI) system. A driver of the RF negative ion source has been finished at Huazhong University of Science and Technology (HUST) last year, and then the extraction system of negative ion source will be finished in the next stage. The extraction system has important influence on the extraction beam. This paper presents a 3D numerical modeling to simulate the extraction system, considering the space charge effect. The electric field is calculated by solving Poisson equation with finite element method (FEM). The particle transport process is simulated with particle-in-cell (PIC) method, considering the electrodes field, the electron deflection magnetic field, as well as the field of the space charge. The influences of the shape of electrodes and the electron deflection magnetic field on the quality of extraction beam are studied. These results provide useful guidance for the design of a negative ion source.
|
| Paper |
download WEP20.PDF [0.629 MB / 3 pages] |
| Conference |
ICAP2015, Shanghai, China |
| Series |
International Computational Accelerator Physics Conference (12th) |
| Proceedings |
Link to full ICAP2015 Proccedings |
| Session |
Poster Session Wollaston |
| Date |
14-Oct-15 13:30–15:30 |
| Main Classification |
B-1 Beam Dynamics Simulation |
| Keywords |
extraction, ion, electron, ion-source, simulation |
| Publisher |
JACoW, Geneva, Switzerland |
| Editors |
Kwok C. Ko (SLAC, Menlo Park, CA, USA); Volker R.W. Schaa (GSI, Darmstadt, Germany); Chuanxiang Tang (Tsinghua University, Beijing, China); Heping Yan (SINAP, Shanghai, China) |
| ISBN |
978-3-95450-136-6 |
| Published |
February 2016 |
| Copyright |
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