Electron temperature fluctuations associated with the weakly coherent mode in the edge of I-mode plasmas
Name
White_Electron temperature.pdf
Size
3.16 MB
Format
Adobe PDF
Checksum (MD5)
df8f35f98b68e7181126c274bc5d6c8c
Author(s)
Phillips, P.
White, Anne E.
Sung, Choongki
Dominguez, Arturo
Cziegler, Istvan
Whyte, Dennis G
Hubbard, Amanda E
Hughes Jr, Jerry
Terry, James L
Date Issued
November 2011
Journal
Nuclear Fusion
Publisher
IOP Publishing
Citation
White, A.E., P. Phillips, D.G. Whyte, A.E. Hubbard, C. Sung, J.W. Hughes, A. Dominguez, J. Terry, and I. Cziegler. “Electron temperature fluctuations associated with the weakly coherent mode in the edge of I-mode plasmas.” Nuclear Fusion 51, no. 11 (November 1, 2011): 113005.
Version
Author's final manuscript
Abstract
New measurements of electron temperature fluctuations associated with the weakly coherent mode (WCM) during improved mode, or I-mode plasmas (Whyte et al 2010 Nucl. Fusion. 50 105005) at Alcator C-Mod (Marmar et al 2007 Fusion. Sci. Technol. 51 3261) are presented in this paper. The measurements are made with a 32-channel, high-resolution profile electron cyclotron emission radiometer. The WCM electron temperature fluctuations are localized to a 1 cm region inside the last closed flux surface. The WCM electron temperature fluctuation level is measured in several different I-mode discharges and is in the range 1% [~ over T][subscript e/T[subscript e] < 2%, which is an order of magnitude smaller than the WCM density fluctuation level. The WCM edge fluctuations observed in I-mode are believed to play a role in increasing particle transport but not energy transport in the edge of I-mode plasmas. The large difference between normalized density and electron temperature fluctuation amplitudes provides new evidence that the WCM fluctuations can separately affect energy and particle transport.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike 3.0
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1088/0029-5515/51/11/113005
