Edge Zonal Flows and Blob Propagation in Alcator C-Mod

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Here we describe recent measurements of the 2-D motion of turbulence in the edge and scrape-off layer (SOL) of the Alcator C-Mod tokamak. This data was taken using the outer midplane gas puff imaging (GPI) camera, which views a 6 cm radial by 6 cm poloidal region near the separatrix just below the outer midplane [1]. The data were taken in Ohmic or RF heated L-mode plasmas at 400,000 frames/sec for {approx}50 msec/shot using a Phantom 710 camera in a 64 x 64 pixel format. The resulting 2-D vs. time movies [2] can resolve the structure and motion of the ... continued below

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Zweben, S; Agostini, M; Davis, B; Grulke, O; Hager, R; Hughes, J et al. July 25, 2011.

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Here we describe recent measurements of the 2-D motion of turbulence in the edge and scrape-off layer (SOL) of the Alcator C-Mod tokamak. This data was taken using the outer midplane gas puff imaging (GPI) camera, which views a 6 cm radial by 6 cm poloidal region near the separatrix just below the outer midplane [1]. The data were taken in Ohmic or RF heated L-mode plasmas at 400,000 frames/sec for {approx}50 msec/shot using a Phantom 710 camera in a 64 x 64 pixel format. The resulting 2-D vs. time movies [2] can resolve the structure and motion of the turbulence on a spatial scale covering 0.3-6 cm. The images were analyzed using either a 2-D cross-correlation code (Sec. 2) or a 2-D blob tracking code (Sec. 3).

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  • 38th European Physical Society Conference on Plasma Physics, Strasbourg, France (June 2011)
  • Conference Proceeding in Srasbourg, France

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  • Report No.: PPPL-4646
  • Grant Number: DE-ACO2-09CH11466
  • Office of Scientific & Technical Information Report Number: 1039418
  • Archival Resource Key: ark:/67531/metadc831815

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  • July 25, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Aug. 3, 2016, 6:26 p.m.

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Zweben, S; Agostini, M; Davis, B; Grulke, O; Hager, R; Hughes, J et al. Edge Zonal Flows and Blob Propagation in Alcator C-Mod, article, July 25, 2011; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc831815/: accessed December 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.