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Vacuum ultraviolet, extreme ultraviolet, and x-ray line intensity normalization technique applied to tokamak plasmas

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4 Author(s)
Peacock, N.J. ; UKAEA-Fusion, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB, United Kingdom ; Lawson, K.D. ; Barnsley, R. ; Chen, H.

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An empirical procedure, “LINT,” for relating emission line intensities of intrinsic impurity ions to their elemental contributions to the total, bolometric, radiation loss and the volume-averaged effective ion charge, Zeff, has been developed and applied to limiter plasmas in the JET tokamak. In this article we discuss extensions to the data base to include x-ray lines and continua intensities, applicable to a wider range of tokamak plasma configurations such as X-point plasmas and quasi-steady-state, edge-cooled ELMy H modes. Examples are shown of the technique applied to reference discharges during which the plasma configuration is changed continuously. The total data set, comprising line and continua irradiances, tomographic bolometry, and x-ray emission and Zeff imposes constraints on the diffusion parameters used in models of impurity ion transport. © 1999 American Institute of Physics.

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Review of Scientific Instruments  (Volume:70 ,  Issue: 1 )