| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9793848 | Journal of Nuclear Materials | 2005 | 5 Pages |
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 5Â 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.
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Nuclear Energy and Engineering
Authors
P.K. Browning, U. Fantz, K.J. Gibson, B. Mihaljcic, D. Wunderlich,