Density and Temperature Correlations in the SOL; Implications for Gas Puff Imaging of Turbulence | Zendy

Moulton D. | Zendy; Marandet Y. | Zendy; Tamain P. | Zendy; Ghendrih Ph. | Zendy; Futtersack R. | Zendy

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Density and Temperature Correlations in the SOL; Implications for Gas Puff Imaging of Turbulence

Author(s) -

Moulton D.,

Marandet Y.,

Tamain P.,

Ghendrih Ph.,

Futtersack R.

Publication year - 2014

Publication title -

contributions to plasma physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.531

H-Index - 47

eISSN - 1521-3986

pISSN - 0863-1042

DOI - 10.1002/ctpp.201410089

Subject(s) - electron temperature , turbulence , plasma , electron density , physics , atomic physics , electron , interpretation (philosophy) , computational physics , materials science , thermodynamics , nuclear physics , computer science , programming language

Using a two‐dimensional turbulence model, a strong linear correlation is found between density and electron temperature within scrape‐off layer fluctuations. This has important implications for gas puff image interpretation for two commonly used lines, D α and HeI (587.6 nm). D α emission responds approximately linearly to proportional changes in the underlying plasma density and electron temperature, making image interpretation relatively straightforward. However, above ∼25 eV, HeI (587.6 nm) emission is approximately constant with proportional changes in density and electron temperature, so underlying plasma perturbations may go unseen. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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