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Blob sizes and velocities in the Alcator C-Mod scrape-off layer
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
Gas-puff imaging data is used to investigate the dynamics of blob-like structures in the scrape-off layer of Alcator C-Mod. A blob-tracking algorithm is developed and used to compute blob propagation velocities and cross-field sizes for a series of discharges where the line-averaged particle density View the MathML source is varied. We find that the mean radial blob velocity increases from View the ...
Intermittent fluctuations in the Alcator C-Mod scrape-off layer
(Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
Fluctuations in the boundary region of the Alcator C-Mod tokamak have been analyzed using gas
puff imaging data. It is found that the fluctuation amplitudes in the near scrape-off layer follow a
normal distribution while the far scrape-off layer fluctuations are dominated by large amplitude
bursts due to radial motion of blob-like structures and have a positively skewed and flattened
amplitude ...