Dust remobilization in fusion plasmas under steady state conditions

TitleDust remobilization in fusion plasmas under steady state conditions
Publication TypeJournal Article
Year of Publication2016
AuthorsP. Tolias, S. Ratynskaia, M. de Angeli, G. De Temmerman, D. Ripamonti, G. Riva, I. Bykov, A. Shalpegin, L. Vignitchouk, F. Brochard, K. Bystrov, S. Bardin, A. Litnovsky
JournalPlasma Physics and Controlled Fusion
Volume58
Issue2
Pagination025009
Abstract

The first combined experimental and theoretical studies of dust remobilization by plasma forces are reported. The main theoretical aspects of remobilization in fusion devices under steady state conditions are analyzed. In particular, the dominant role of adhesive forces is highlighted and generic remobilization conditions—direct lift-up, sliding, rolling—are formulated. A novel experimental technique is proposed, based on controlled adhesion of dust grains on tungsten samples combined with detailed mapping of the dust deposition profile prior and post plasma exposure. Proof-of-principle experiments in the TEXTOR tokamak and the EXTRAP-T2R reversed-field pinch are presented. The versatile environment of the linear device Pilot-PSI allowed for experiments with different magnetic field topologies and varying plasma conditions that were complemented with camera observations.

URLhttps://arxiv.org/abs/1508.06156
DOI10.1088/0741-3335/58/2/025009
Division

PSI

Department

PSI-E

PID

5dab3010cd8625346d5295d02fae96a3

Alternate TitlePlasma Phys. Control. Fusion

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