Devices for Diagnostics and Lithium Collection on the T-11M and T-10 Tokamaks. First Results

• Published in: Plasma physics reports Vol. 44; no. 7; pp. 631 - 635
• Main Authors: Zharkov, M. Yu, Vertkov, A. V., Lyublinski, I. E., Vershkov, V. A., Karpov, A. V., Mirnov, S. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-07-2018; Springer Nature B.V
• Subjects: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Atomic; Bellows; Collection; Diagnostic systems; ELECTRIC FIELDS; FIRST WALL; LANGMUIR PROBE; LIQUID METALS; LITHIUM; Molecular; Optical and Plasma Physics; Physics; Physics and Astronomy; PIEZOELECTRICITY; PLASMA; PLASMA SCRAPE-OFF LAYER; T-10 TOKAMAK; Tokamak devices; Tokamaks
• ISSN: 1063-780X; 1562-6938
• DOI: 10.1134/S1063780X18070103

The use of lithium as a material of the tokamak in-vessel plasma-facing components made it necessary to develop appropriate diagnostic instruments. For the T-10 and T-11M tokamaks, devices have been developed that allow one to investigate the processes of lithium transport in the tokamak scrape-off layer, the dynamics of lithium deposition at different temperatures of the collecting surface in real time by using a piezoelectric quartz detector, adsorption and desorption of the plasma-forming gas by lithium, and the influence of the electric field on the process of lithium collection. The plasma parameters are monitored using Langmuir probes. The developed devices can be used to extract lithium deposited on the tokamak vessel wall without breaking vacuum conditions. For these purposes, a gateway and a vacuum input without bellows have been designed on the basis of an innovative liquid-metal coupling.