Probe measurements in the scrape-off layer of a Tokamak
Abstract
A Langmuir probe is used to study the plasma behavior in the scrape-off layer of JFT-2a, (a tokamak with an axisymmetric divertor). The measurements reveal particle fluxes to the divertor and the wall as well as cross-field profiles of density and potential in the scrape-off layer. On the basis of these measurements, the cross-field diffusion coefficient in the scrape-off layer and the divertor efficiency are estimated. The existence of the magnetic limiter is also verified by the method.
- Publication:
-
Plasma Physics
- Pub Date:
- August 1978
- DOI:
- 10.1088/0032-1028/20/8/003
- Bibcode:
- 1978PlPh...20..749O
- Keywords:
-
- Electrostatic Probes;
- Impurities;
- Ion Currents;
- Plasma Diagnostics;
- Plasma Layers;
- Tokamak Devices;
- Crossed Fields;
- Diffusion Coefficient;
- Diverters;
- Ion Density (Concentration);
- Plasma Potentials;
- Reactor Design;
- Plasma Physics