MEASUREMENTS OF THE INFLUENCE OF SECONDARY ELECTRON EMISSION ON THE CURRENTS AND VOLTAGES BETWEEN DIFFERENT WALL PROBES FACING A PLASMA
The current-voltage characteristics of wall probes, made from materials of different secondary electron emission, have been measured on the endplates of a small magnetic mirror and in the scrape-off layer of TEXTOR Tokamak. The probes were operated like double Langmuir probes. It is found that for electron temperatures significantly exceeding 10 eV the characteristics become non-symmetric with respect to the ordinate. The results are compared to a theoretical model.
Bibliographic Reference: JOURNAL OF NUCLEAR MATERIALS, VOLS. 145-147 (1987), PP. 268-271
Record Number: 1989126017200 / Last updated on: 1989-03-01
Available languages: en