| Hauptseite > Analysis of H− extraction in the Linac4 negative ion source by 2.5D particle simulation |
| Published Articles | |
| Title | Analysis of H− extraction in the Linac4 negative ion source by 2.5D particle simulation |
| Author(s) | Abe, S (Keio U.) ; Nishioka, S (Keio U.) ; Mattei, S (CERN) ; Miyamoto, K (Naruto U. of Education) ; Hatayama, A (Keio U.) ; Lettry, J (CERN) |
| Publication | 2018 |
| Number of pages | 3 |
| In: | AIP Conf. Proc. 2011 (2018) 080020 |
| In: | International Conference on Ion Sources, CERN Geneva, Geneva, Switzerland, 15 - 20 Oct 2017, pp.080020 |
| DOI | 10.1063/1.5053375 |
| Subject category | Accelerators and Storage Rings |
| Accelerator/Facility, Experiment | CERN LINAC4 |
| Abstract | The purpose of this study is to investigate the extraction mechanisms of the H− ions in the Linac4 negative ion source by using an improved two-dimensional in real space and three-dimensional in velocity space Particle in Cell (2D3V-PIC) model. In this model, the following collision processes of the surface produced H− (Hsp−) ions have been introduced and the effects of the collisions on H− extraction have been analyzed: elastic (Hsp− - H2) and charge exchange (Hsp− - H). It is shown that the extracted Hsp− current increases due to the flow reversal of the Hsp ions caused by these collisions. |