Drift wave test particle transport in reversed shear profile

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Description

Drift wave maps, area preserving maps that describe the motion of charged particles in drift waves, are derived. The maps allow the integration of particle orbits on the long time scale needed to describe transport. Calculations using the drift wave maps show that dramatic improvement in the particle confinement, in the presence of a given level and spectrum E x B turbulence, can occur for q(r)-profiles with reversed shear. A similar reduction in the transport, i.e., one that is independent of the turbulence, is observed in the presence of an equilibrium radial electric field with shear. The transport reduction, caused ... continued below

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25 p.

Creation Information

Horton, W.; Strozzi, D.; Morrison, P.J.; Park, H.B.; Kwon, J.M. & Choi, D.I. June 1, 1998.

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  • Horton, W.
  • Strozzi, D.
  • Morrison, P.J. Univ. of Texas, Austin, TX (United States). Inst. for Fusion Studies
  • Park, H.B.
  • Kwon, J.M. Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Physics
  • Choi, D.I. Korea Advanced Inst. of Science and Technology, Taejon (Korea, Republic of). Dept. of Physics

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Description

Drift wave maps, area preserving maps that describe the motion of charged particles in drift waves, are derived. The maps allow the integration of particle orbits on the long time scale needed to describe transport. Calculations using the drift wave maps show that dramatic improvement in the particle confinement, in the presence of a given level and spectrum E x B turbulence, can occur for q(r)-profiles with reversed shear. A similar reduction in the transport, i.e., one that is independent of the turbulence, is observed in the presence of an equilibrium radial electric field with shear. The transport reduction, caused by the combined effects of radial electric field shear and both monotonic and reversed shear magnetic q-profiles, is also investigated.

Physical Description

25 p.

Notes

INIS; OSTI as DE99000298

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  • Other Information: PBD: Jun 1998

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  • Other: DE99000298
  • Report No.: DOE/ER/54346--826
  • Grant Number: FG03-96ER54346
  • DOI: 10.2172/674816 | External Link
  • Office of Scientific & Technical Information Report Number: 674816
  • Archival Resource Key: ark:/67531/metadc708511

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  • June 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 4, 2015, 5:40 p.m.

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Horton, W.; Strozzi, D.; Morrison, P.J.; Park, H.B.; Kwon, J.M. & Choi, D.I. Drift wave test particle transport in reversed shear profile, report, June 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc708511/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.