Dust remobilization in fusion plasmas under steady state conditions

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 re...

Full description

Saved in:
Bibliographic Details
Published in:Plasma physics and controlled fusion 2016-02, Vol.58 (2), p.25009
Main Authors: Tolias, P, Ratynskaia, S, De Angeli, M, De Temmerman, G, Ripamonti, D, Riva, G, Bykov, I, Shalpegin, A, Vignitchouk, L, Brochard, F, Bystrov, K, Bardin, S, Litnovsky, A
Format: Article
Language:English
Subjects:
Adhesion
Controlled fusion
Devices
Dust
dust adhesion
Dust control
dust remobilization
PFC
Plasmas
Steady state
Tungsten
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0741-3335
1361-6587
1361-6587
DOI:10.1088/0741-3335/58/2/025009