A Particle-In-Cell Gun Code for Surface-Converter H- Ion Source Modeling

Journal Article · Fri Aug 10 00:00:00 EDT 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2773668· OSTI ID:21032661

Chacon-Golcher, Edwin ^[1]; Bowers, Kevin J ^[2]

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1. Los Alamos National Laboratory, Los Alamos NM, 87545 (United States)
2. D.E. Shaw and Company, New York NY, 10036 (United States)

We present the current status of a particle-in-cell with Monte Carlo collisions (PIC-MCC) gun code under development at Los Alamos for the study of surface-converter H- ion sources. The program preserves a first-principles approach to a significant extent and simulates the production processes without ad hoc models within the plasma region. Some of its features include: solution of arbitrary electrostatic and magnetostatic fields in an axisymmetric (r,z) geometry to describe the self-consistent time evolution of a plasma; simulation of a multi-species (e-,H+,H{sub 2}{sup +},H{sub 3}{sup +},H-) plasma discharge from a neutral hydrogen gas and filament-originated seed electrons; full 2-dimensional (r,z) 3-velocity (vr,vz,v{phi}) dynamics for all species with exact conservation of the canonical angular momentum p{phi}; detailed collision physics between charged particles and neutrals and the ability to represent multiple smooth (not stair-stepped) electrodes of arbitrary shape and voltage whose surfaces may be secondary-particle emitters (H- and e-). The status of this development is discussed in terms of its physics content and current implementation details.

• OSTI ID: 21032661
• Journal Information: AIP Conference Proceedings, Vol. 925, Issue 1; Conference: 11. international symposium on the production and neutralization of negative ions and beams, Santa Fe, NM (United States), 13-15 Sep 2006; Other Information: DOI: 10.1063/1.2773668; (c) 2007 American Institute of Physics; 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
ANGULAR MOMENTUM
AXIAL SYMMETRY
ELECTRIC POTENTIAL
ELECTRODES
ELECTRON COLLISIONS
ELECTRONS
HYDROGEN IONS 1 MINUS
HYDROGEN IONS 2 PLUS
HYDROGEN IONS 3 PLUS
ION COLLISIONS
ION SOURCES
LOS ALAMOS
MATHEMATICAL SOLUTIONS
MONTE CARLO METHOD
PLASMA
PLASMA SIMULATION
TWO-DIMENSIONAL CALCULATIONS