Abstract
To understand the physical mechanism of the beam halo formation in negative ion beams, a two-dimensional particle-in-cell code for simulating the trajectories of negative ions created via surface production has been developed. The simulation code reproduces a beam halo observed in an actual negative ion beam. The negative ions extracted from the periphery of the plasma meniscus (an electro-static lens in a source plasma) are over-focused in the extractor due to large curvature of the meniscus.
Original language | English |
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Article number | 023512 |
Journal | Applied Physics Letters |
Volume | 102 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2013 Jan 14 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)