Blob structure and motion in the edge and SOL of NSTX

Zweben, S. J.; Myra, J. R.; Davis, W. M.; D’Ippolito, D. A.; Gray, T. K.; Kaye, S. M.; LeBlanc, B. P.; Maqueda, R. J.; Russell, D. A.; Stotler, D. P.

doi:10.1088/0741-3335/58/4/044007

Title: Blob structure and motion in the edge and SOL of NSTX

Journal Article · Thu Jan 28 00:00:00 EST 2016 · Plasma Physics and Controlled Fusion

DOI:https://doi.org/10.1088/0741-3335/58/4/044007· OSTI ID:1254654

^[1]; Myra, J. R. ^[2];

^[1]; D’Ippolito, D. A. ^[2]; Gray, T. K. ^[3]; Kaye, S. M. ^[1]; LeBlanc, B. P. ^[1]; Maqueda, R. J. ^[4]; Russell, D. A. ^[2];

^[1]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Lodestar Research Corp., Boulder, CO (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); X Science LLC, Plainsboro, NJ 08536, USA.

The structure and motion of discrete plasma blobs (a.k.a. filaments) in the edge and scrape-off layer of NSTX is studied for representative Ohmic and H-mode discharges. Individual blobs were tracked in the 2D radial versus poloidal plane using data from the gas puff imaging diagnostic taken at 400000 frames s^–1. A database of blob amplitude, size, ellipticity, tilt, and velocity was obtained for similar to ~45 000 individual blobs. Empirical relationships between various properties are described, e.g. blob speed versus amplitude and blob tilt versus ellipticity. Lastly, the blob velocities are also compared with analytic models.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: The NSTX-U Team

Grant/Contract Number:: AC02-09CH11466; FG02-02ER54678; AC05-00OR22725

OSTI ID:: 1254654

Alternate ID(s):: OSTI ID: 1266861

Report Number(s):: PPPL-5194

Journal Information:: Plasma Physics and Controlled Fusion, Vol. 58, Issue 4; Related Information: The digital data for this paper can be found at: http://arks.princeton.edu/ark:/88435/dsp01vx021h49j; ISSN 0741-3335

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 55 works

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