A simple and expeditious technique is developed for calculating the neutral density profile in the dense region of large Tokamak plasmas, where lambda mfp<<a. The method rests on determining the local logarithmic derivative of n0 from a self-consistent calculation of the radial flux of neutrals Gamma , combined with the condition that div. Gamma +n 0ne( sigma nu )ei=0. The results from this simple technique are compared with a more time-consuming Monte-Carlo calculation, and good agreement is found.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physics and Astronomy(all)