期刊
PHYSICS OF PLASMAS
卷 16, 期 8, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.3191721
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资金
- U.S. DOE [DE-AC02-76CH03073]
- USDOE [DE-FC02-99ER54512]
This paper describes quantitative comparisons between turbulence measured in the scrape-off layer (SOL) of Alcator C-Mod [S. Scott, A. Bader, M. Bakhtiari et at., Nucl. Fusion 47, S598 (2007)] and three dimensional computations using electromagnetic gyrofluid equations in a two-dimensional tokamak geometry. These comparisons were made for the outer midplane SOL for a set of inner-wall limited, near-circular Ohmic plasmas. The B field and plasma density were varied to assess gyroradius and collisionality scaling. The poloidal and radial correlation lengths in the experiment and computation agreed to within a factor of 2 and did not vary significantly with either B or density. The radial and poloidal propagation speeds and the frequency spectra and poloidal k-spectra also agreed fairly well. However, the autocorrelation times and relative D-a fluctuation levels were higher in the experiment by more than a factor of 2. Possible causes for these disagreements are discussed. (C) 2009 American Institute of Physics. [DOI: 10.1063/1.3191721]
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