Using a Constants-of-Motion Space to Clarify Measurements Involving Energetic Ion Orbits in Tokamaks

摘要

In tokamaks with low plasma current, energetic ion guiding center orbits can have large deviations from a poloidal flux surface. Analyses of the fast-ion orbit topology in a local constants-of-motion space (epsilon, mu , P sub phi) and in a more physical space (R,v sub parallel/v,epsilon) are used to define the wall loss regions, the trapped-particle regions, and the various types of fast-ion orbits that must be taken into account in interpreting high-energy charge-exchange or neutron measurements in tokamaks. (ERA citation 07:006447)