Density and Temperature Correlations in the SOL; Implications for Gas Puff Imaging of Turbulence. Issue 4 (June 2014)

• Record Type: Journal Article
• Authors: Moulton, D.; Marandet, Y.; Tamain, P.; Ghendrih, Ph.; Futtersack, R.
• Is Part Of: Contributions to plasma physics. Volume 54:Issue 4/6(2014)
• Page Start: 575
• Page End: 579
• Publication Date: 2014-06
• Subjects: Plasma (Ionized gases) -- Periodicals; Electronic journals; 530.44
• DOI: 10.1002/ctpp.201410089
• Languages: English
• ISSNs: 0863-1042

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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, <italic>D</italic>_{<italic>α</italic>} and HeI (587.6 nm). <italic>D</italic>_{<italic>α</italic>} 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 &amp; Co. KGaA, Weinheim)</p> </abstract>