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

Abstract

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.

Authors:

^[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.

Publication Date:: Thu Jan 28 00:00:00 EST 2016

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

Sponsoring Org.:: USDOE Office of Science (SC)

Contributing Org.:: The NSTX-U Team

OSTI Identifier:: 1254654

Alternate Identifier(s):: OSTI ID: 1266861

Report Number(s):: PPPL-5194
Journal ID: ISSN 0741-3335

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

Resource Type:: Accepted Manuscript

Journal Name:: Plasma Physics and Controlled Fusion

Additional Journal Information:: Journal Volume: 58; Journal Issue: 4; Related Information: The digital data for this paper can be found at: http://arks.princeton.edu/ark:/88435/dsp01vx021h49j; Journal ID: ISSN 0741-3335

Publisher:: IOP Science

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; scrape-off layer (SOL); tokamaks; NSTX; turbulence; tokamak; edge

Citation Formats


                    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., and Stotler, D. P. Blob structure and motion in the edge and SOL of NSTX.  United States: N. p., 2016. 
Web.  doi:10.1088/0741-3335/58/4/044007.

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                    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. Blob structure and motion in the edge and SOL of NSTX.  United States.  https://doi.org/10.1088/0741-3335/58/4/044007

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                    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., and Stotler, D. P. Thu .  
"Blob structure and motion in the edge and SOL of NSTX".  United States.  https://doi.org/10.1088/0741-3335/58/4/044007.  https://www.osti.gov/servlets/purl/1254654.

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@article{osti_1254654,

  title        = {Blob structure and motion in the edge and SOL of NSTX},

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

  abstractNote = {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.},

  doi          = {10.1088/0741-3335/58/4/044007},

  journal      = {Plasma Physics and Controlled Fusion},

  number       = 4,

  volume       = 58,

  place        = {United States},

  year         = {Thu Jan 28 00:00:00 EST 2016},

  month        = {Thu Jan 28 00:00:00 EST 2016}

}

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