2010
DOI: 10.1063/1.3381070
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Experimental production and identification of electron temperature gradient modes

Abstract: The electron temperature gradient ͑ETG͒ mode, which is believed to be one of the strongest candidates for the anomalous electron energy transport in plasmas, is difficult to detect in experiments because of its high frequency ͑ϳMHz͒ and short wavelength ͑k Ќ e Յ 1͒. Using a dc bias heating scheme of the core plasma, we are able to produce a sufficiently strong ETG for exciting ETG modes in the Columbia linear machine ͓R. Scarmozzino, A. K. Sen, and G. A. Navratil, Phys. Fluids 31, 1773 ͑1988͔͒. A high frequenc… Show more

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Cited by 26 publications
(34 citation statements)
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“…Although the electron scale fluctuations were identified in a tokamak experiment [14], the ETG characterization was not complete and its role in the electron transport was not directly verified. Production and identification of slab ETG mode have been successfully demonstrated in a basic experiment in Columbia Linear Machine (CLM) [15]. Using a dc bias heating scheme of the core plasma, we were able to produce sufficiently strong electron temperature gradient to excite ETG modes in CLM experiments [15], which has been recently verified partially in numerical simulation [16].…”
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confidence: 80%
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“…Although the electron scale fluctuations were identified in a tokamak experiment [14], the ETG characterization was not complete and its role in the electron transport was not directly verified. Production and identification of slab ETG mode have been successfully demonstrated in a basic experiment in Columbia Linear Machine (CLM) [15]. Using a dc bias heating scheme of the core plasma, we were able to produce sufficiently strong electron temperature gradient to excite ETG modes in CLM experiments [15], which has been recently verified partially in numerical simulation [16].…”
mentioning
confidence: 80%
“…Production and identification of slab ETG mode have been successfully demonstrated in a basic experiment in Columbia Linear Machine (CLM) [15]. Using a dc bias heating scheme of the core plasma, we were able to produce sufficiently strong electron temperature gradient to excite ETG modes in CLM experiments [15], which has been recently verified partially in numerical simulation [16]. These results and our novel diagnostic technique for local measurement of electron thermal transport enabled the first determination of its direct measurement.…”
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confidence: 99%
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“…[23,24]. CLM is steady-state collisionless cylindrical plasma machine with an uniform axial magnetic field (Fig.1).…”
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confidence: 99%