Charles Karney: Publication 32/85, White(1983)

R. B. White, A. H. Boozer, R. J. Goldston, R. G. Hay, J. Albert, and C. F. F. Karney.
Confinement in toroidal systems with partially destroyed magnetic surfaces.
In Plasma Physics and Controlled Nuclear Fusion Research 1982, volume 3, pages 391–401, IAEA, Vienna, 1983.
Proc. Ninth International Conf., Baltimore, MD, Sept. 1–8, 1982.
Reprint: iaea83b
BibTeX Entry

A Hamiltonian formulation of the guiding centre drift equations valid for stochastic fields is given. Modification of neoclassical transport due to imperfect magnetic surfaces is investigated numerically. For banana-trapped particles a discrete map representation is given for the orbits and used to study loss of banana-trapped α-particles due to ripple fields.