Edge turbulence imaging in the Alcator C-Mod tokamak

Zweben, S. J.; Stotler, D. P.; Terry, J. L.; LaBombard, B.; Greenwald, M.; Muterspaugh, M.; Pitcher, C. S.; Hallatschek, K.; Maqueda, R. J.; Rogers, B.; Lowrance, J. L.; Mastrocola, V. J.; Renda, G. F.

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Edge turbulence imaging in the Alcator C-Mod tokamak

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Hallatschek, K.
Centre for Interdisciplinary Plasma Science (CIPS), Max Planck Institute for Plasma Physics, Max Planck Society;
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

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引用

Zweben, S. J., Stotler, D. P., Terry, J. L., LaBombard, B., Greenwald, M., Muterspaugh, M., Pitcher, C. S., Hallatschek, K., Maqueda, R. J., Rogers, B., Lowrance, J. L., Mastrocola, V. J., & Renda, G. F. (2002). Edge turbulence imaging in the Alcator C-Mod tokamak. Physics of Plasmas, 9(5), 1981-1989.

引用: https://hdl.handle.net/11858/00-001M-0000-0027-4130-7

要旨

The two-dimensional (2D) radial vs poloidal structure of edge turbulence in the Alcator C-Mod tokamak [I. H. Hutchinson, R. Boivin, P. T. Bonoli , Nucl. Fusion 41, 1391 (2001)] was measured using fast cameras and compared with three-dimensional numerical simulations of edge plasma turbulence. The main diagnostic is gas puff imaging, in which the visible D-alpha emission from a localized D-2 gas puff is viewed along a local magnetic field line. The observed D-alpha fluctuations have a typical radial and poloidal scale of approximate to1 cm, and often have strong local maxima ("blobs") in the scrape-off layer. The motion of this 2D structure motion has also been measured using an ultrafast framing camera with 12 frames taken at 250 000 frames/s. Numerical simulations produce turbulent structures with roughly similar spatial and temporal scales and transport levels as that observed in the experiment; however, some differences are also noted, perhaps requiring diagnostic improvement and/or additional physics in the numerical model. (C) 2002 American Institute of Physics.