
%0 Journal Article
%A Davidson, MG 
%A Dewar, RL 
%A Gardner, HJ 
%A Howard, J 
%T Hamiltonian Maps for Heliac Magnetic Islands
%J Australian Journal of Physics
%D 1995/10/01
%V 48
%N 5
%P 871-886
%K 
%R https://doi.org/10.1071/PH950871
%U https://www.publish.csiro.au/paper/PH950871 
%X Magnetic islands in toroidal heliac stellarator vacuum fields are explored with Hamiltonian chaos theory and the associated area-preserving maps. Magnetic field line island chains are examined first analytically, with perturbation theory, and then numerically to produce Poincar&#233; sections, which are compared with H&#8722;1 Heliac stellarator puncture plot diagrams. Rotational transform profiles are chosen to permit the comparison of twist map and nontwist map predictions with field line behaviour computed by a field line tracing computer program and observed experimentally. 
