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, 337-33. pp. 232-236. ISSN 0022-3115
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.
|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|
|Publisher:||Elsevier Science B.V., Amsterdam.|