Effects of Global Boundary and Local Collisionality on Magnetic Reconnection in a Laboratory Plasma

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Description

The magnetic reconnection process is studied in a wide range of operating conditions in the well-controlled Magnetic Reconnection Experiment. The reconnection rate is observed to be a function of both global (i.e., system size) and local (collisionality) plasma parameters. When only local collisionality is lowered, the current sheet is shortened while effective resistivity is enhanced, both accelerating reconnection rates. At a fixed collisionality, the current sheet length increases with system size, resulting in the reduction of the reconnection rate. These results quantitatively agree with a generalized Sweet-Parker analysis.

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A. Kuritsyn, H. Ji, S.P. Gerhardt, Y. Ren, and M. Yamada July 24, 2007.

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Description

The magnetic reconnection process is studied in a wide range of operating conditions in the well-controlled Magnetic Reconnection Experiment. The reconnection rate is observed to be a function of both global (i.e., system size) and local (collisionality) plasma parameters. When only local collisionality is lowered, the current sheet is shortened while effective resistivity is enhanced, both accelerating reconnection rates. At a fixed collisionality, the current sheet length increases with system size, resulting in the reduction of the reconnection rate. These results quantitatively agree with a generalized Sweet-Parker analysis.

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372KB

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  • Report No.: PPPL-4255
  • Grant Number: DE-ACO2-76CHo3073
  • Office of Scientific & Technical Information Report Number: 962701
  • Archival Resource Key: ark:/67531/metadc928952

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  • July 24, 2007

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

Description Last Updated

  • Dec. 12, 2016, 8:52 p.m.

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A. Kuritsyn, H. Ji, S.P. Gerhardt, Y. Ren, and M. Yamada. Effects of Global Boundary and Local Collisionality on Magnetic Reconnection in a Laboratory Plasma, report, July 24, 2007; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc928952/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.