Experimental study of the principles governing tokamak transport
Abstract
Both in ohmically and beam-heated L-mode discharges of ASDEX, the electron-temperature (Te) profile shape can be varied over a wide range by the choice of the safety factor qa. The power-deposition profile, on the contrary, has no effect on the Te-profile shape. In current-free WVII-A stellarator plasmas, no such invariance property is found. An independent constraint seems to fix the current distribution j(r) of the tokamak, which defines the conditions of electron heat transport.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 1986
- DOI:
- 10.1103/PhysRevLett.56.2187
- Bibcode:
- 1986PhRvL..56.2187W
- Keywords:
-
- 52.25.Fi;
- 52.55.Fa;
- Transport properties;
- Tokamaks spherical tokamaks