Simple model analysis on the negative-ion extraction from a plasma
- Faculty of Physics, Sofia University, BG-1164 Sofia (Bulgaria)
- Department of Applied Physics, Technical University-Sofia, BG-1000 Sofia (Bulgaria)
Extraction of negative hydrogen ions from a plasma is analyzed with a view to the description of the extraction region of the negative hydrogen ion-beam sources developed for additional heating of fusion plasmas. The numerical procedure introduced in the study is a modification of the indirect Poisson-Vlasov method. It uses a condition for the plasma meniscus and employs analogy with the particle-in-cell model simulation. The analysis of the results shows that the charged particle velocity distribution at the entrance of the extraction region influences the properties of the extracted beams and its effect should be considered when conditions for well converged beams are looked for through variation in the plasma density and in the potentials of the electrodes of the extraction system.
- OSTI ID:
- 21359367
- Journal Information:
- Journal of Applied Physics, Vol. 106, Issue 11; Other Information: DOI: 10.1063/1.3259399; (c) 2009 American Institute of Physics; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Similar Records
Numerical analysis of electronegative plasma in the extraction region of negative hydrogen ion sources
Simulations for the generation and extraction of negative hydrogen ions in RF-driven ion sources