Study of beam optics and beam halo by integrated modeling of negative ion beams from plasma meniscus formation to beam acceleration

Journal Article · Mon Jan 14 04:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4788725· OSTI ID:22162677

Miyamoto, K. ^[1]; Okuda, S.; Hatayama, A. ^[2]; Hanada, M.; Kojima, A. ^[3]

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1. Naruto University of Education, 748 Nakashima, Takashima, Naruto-cho, Naruto-shi, Tokushima 772-8502 (Japan)
2. Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522 (Japan)
3. Japan Atomic Energy Agency, 801-1 Mukouyama, Naka 319-0913 (Japan)

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.

• OSTI ID: 22162677
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 102; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATION
BEAM OPTICS
ELECTROSTATIC LENSES
EXTRACTION
ION BEAMS
IONS
PARTICLE BEAMS
PLASMA
PLASMA SIMULATION
SURFACES
TRAJECTORIES
TWO-DIMENSIONAL CALCULATIONS