Poloidal motion of trapped particle orbits in real-space coordinates

Journal Article · Thu May 15 04:00:00 EDT 2008 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2912456· OSTI ID:21120306

Nemov, V V; Kasilov, S V ^[1]; Kernbichler, W; Leitold, G O ^[2]

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1. Institute of Plasma Physics, National Science Center, 'Kharkov Institute of Physics and Technology', Akademicheskaya str. 1, 61108 Kharkov (Ukraine)
2. Association EURATOM-OeAW, Institut fuer Theoretische Physik-Computational Physics, Technische Universitaet Graz, Petersgasse 16, A-8010 Graz (Austria)

The bounce averaged poloidal drift velocity of trapped particles in stellarators is an important quantity in the framework of optimization of stellarators because it allows us to analyze the possibility for closure of contours of the second adiabatic invariant and therefore for improvement of {alpha}-particle confinement in such a device. Here, a method is presented to compute such a drift velocity directly in real space coordinates through integration along magnetic field lines. This has the advantage that one is not limited to the usage of magnetic coordinates and can use the magnetic field produced by coil currents and more importantly also results of three-dimensional magnetohydrodynamic finite beta equilibrium codes, such as PIES [A. H. Reiman and H. S. Greenside, J. Comput. Phys. 75, 423 (1988)] and HINT [Y. Suzuki et al., Nucl. Fusion 46, L19 (2006)].

• OSTI ID: 21120306
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 15; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALPHA PARTICLES
COORDINATES
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
PLASMA
PLASMA CONFINEMENT
PLASMA SIMULATION
SPACE
STELLARATORS
THREE-DIMENSIONAL CALCULATIONS
TRAPPING