Abstract
A two-dimensional fast ion Fokker-Planck equation is analytically solved with a new cross-section formula for charge exchange loss. The new formula includes the exact cross-section dependence on ion energy and is valid from 2 keV up to several hundred keV, where charge exchange is always negligible. A loss of beam driven currents due to the charge exchange has been analysed, using this analytic solution of Fokker-Planck equation. It has been revealed that the previous rough treatment with the charge exchange cross-section, proportional to 1/ nu , sometimes results in a considerable error. By a systematic parametric survey, the reduction rates for beam driven currents, due to charge exchange loss, are rearranged and tabled. Also, a reduction in global current drive efficiency by charge exchange in a next generation Tokamak is briefly discussed.
| Original language | English |
|---|---|
| Article number | 006 |
| Pages (from-to) | 1115-1126 |
| Number of pages | 12 |
| Journal | Plasma Physics and Controlled Fusion |
| Volume | 29 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1987 Dec 1 |
ASJC Scopus subject areas
- Nuclear Energy and Engineering
- Condensed Matter Physics