It is shown that the size of a charged particle's drift orbit is squeezed, i.e., reduced, in a magnetic well in tokamak plasmas. The squeezing factor depends on the energy of the particle, being larger for higher-energy particles. Therefore, for high-energy particles, the size of the drift orbit depends only on the magnetic geometry. These energy-independent drift orbits are also observed [J. A. Rome and Y.-K. M. Ping, Nucl. Fusion 19, 1193 (1979)]. The implications on the core confinement improvement physics and the confinement of the advanced fuel are discussed.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics