Poloidal velocity of impurity ions in neoclassical theory
- General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)
A formula for the poloidal velocity of impurity ions in a two-species plasma is derived from neoclassical theory in the banana regime, with corrections from the boundary layer separating the trapped and transiting ions. The formula is applicable to plasmas with toroidal rotations that can approach the thermal speeds of the ions. Using the formula to determine the poloidal velocity of C{sup +6} ions in a recently reported experiment [W. M. Solomon et al., Phys. Plasmas 13, 056116 (2006)] leads to agreement in the direction of the central region when it is otherwise from theories without strong toroidal rotations. Comparisons among these theories are made, demonstrating the degree of uncertainty of theoretical predictions.
- OSTI ID:
- 21120517
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 15; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Comparison of Poloidal Velocity Meassurements to Neoclassical Theory on the National Spherical Torus Experiment
Experimental test of the neoclassical theory of impurity poloidal rotation in tokamaks