Abstract
Strongly intermittent turbulence is observed in the shadow of a limiter in the large plasma device at UCLA [W. Gekelman, Rev. Sci. Instrum. 62, 2875 (1991)]. The amplitude probability distribution function of the turbulence is strongly skewed, with density depletion events (or "holes") dominant in the high-density region and density-enhancement events (or "blobs") dominant in the low-density region. Two-dimensional cross-conditional averaging shows that the blobs are detached, outward-propagating filamentary structures with a clear dipolar potential, while the holes appear to be part of a more extended turbulent structure. A statistical study of the blobs reveals a typical size of ten times the ion sound gyroradius and a typical velocity of one-tenth the sound speed.
Original language | English |
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Article number | 010701 |
Pages (from-to) | 1-4 |
Number of pages | 4 |
Journal | Physics of Plasmas |
Volume | 13 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2006 |
Externally published | Yes |