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Spatial structure of detached plasmas in the ULS divertor simulator

Browning, P.K., Fantz, U., Gibson, K.J., Mihaljcic, B. and Wunderlich, D. (2005) Spatial structure of detached plasmas in the ULS divertor simulator. Journal of Nuclear Materials, 337-339. pp. 232-236. ISSN 0022-3115

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Abstract

The UMIST Linear system (ULS) is a linear plasma device designed to study plasma and atomic physics issues relevant to tokamak divertors. The ULS produces a steady state plasma beam which interacts with neutral gas in a target chamber. Dependent on the upstream conditions, either electron-ion recombination (EIR) or molecular activated recombination (MAR) may dominate. Here we report on detailed studies of the plasma spatial structure in both regimes. A specially designed optical spectroscopy probe is used to measure the visible emission, with spatial resolution less than 5 mm. Atomic and molecular lines are identified, and the results are interpreted using a collisional-radiative model, enabling the MAR rate to be calculated. One dimensional plasma modelling also demonstrates a transition between EIR and MAR dominated regimes, as the upstream conditions are varied.

Item Type: Article
Institution: The University of York
Academic Units: The University of York > Physics (York)
Depositing User: York RAE Import
Date Deposited: 21 Apr 2009 11:02
Last Modified: 21 Apr 2009 11:25
Published Version: http://dx.doi.org/10.1016/j.jnucmat.2004.10.040
Status: Published
Publisher: Elsevier Science B.V., Amsterdam.
Identification Number: 10.1016/j.jnucmat.2004.10.040
URI: http://eprints.whiterose.ac.uk/id/eprint/6793

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