Study of negative hydrogen ion beam optics using the 3D3V PIC model

Journal Article · Wed Apr 08 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4916461· OSTI ID:22391441

Nishioka, S.; Goto, I.; Hatayama, A. ^[1]; Hanada, M.; Kojima, A. ^[2]

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1. Faculty of Science and Technology, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, 223-8522 (Japan)
2. Japan Atomic Energy Agency, 801-1,Mukoyama, Naka, 319-0913 (Japan)

The mechanism of negative ion extraction under real conditions with the complex magnetic field is studied by using the 3D PIC simulation code. The extraction region of the negative ion source for the negative ion based neutral beam injection system in fusion reactors is modelled. It is shown that the E x B drift of electrons is caused by the magnetic filter and the electron suppression magnetic field, and the resultant asymmetry of the plasma meniscus. Furthermore, it is indicated that that the asymmetry of the plasma meniscus results in the asymmetry of negative ion beam profile including the beam halo. It could be demonstrated theoretically that the E x B drift is not significantly weakened by the elastic collisions of the electrons with neutral particles.

• OSTI ID: 22391441
• Journal Information: AIP Conference Proceedings, Vol. 1655, Issue 1; Conference: NIBS 2014: 4. International Symposium on Negative Ions, Beams and Sources, Garching (Germany), 6-10 Oct 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
BEAM OPTICS
BEAM PROFILES
COMPUTERIZED SIMULATION
ELECTRON COLLISIONS
ELECTRON DRIFT
ELECTRONS
HYDROGEN IONS 1 MINUS
ION DRIFT
MAGNETIC FIELDS
MAGNETIC FILTERS
NEUTRAL ATOM BEAM INJECTION
NEUTRAL PARTICLES
PLASMA
PLASMA SIMULATION
THERMONUCLEAR REACTORS