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Title: Drift Wave Test Particle Transport in Reversed Shear Profile

Abstract

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 of 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.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
University of Texas, Austin, TX (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
761830
Report Number(s):
DE-FG03-99ER-54346-826; DOE/ER/54346-826; IFSR 826
TRN: US0111125
DOE Contract Number:  
FG03-96ER54346
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Jun 1998
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHARGED PARTICLES; REVERSED SHEAR; MASS TRANSFER; TURBULENCE

Citation Formats

Horton, W, Park, H B, Kwon, J M, Stronzzi, D, Morrison, P J, and Choi, D I. Drift Wave Test Particle Transport in Reversed Shear Profile. United States: N. p., 1998. Web. doi:10.2172/761830.
Horton, W, Park, H B, Kwon, J M, Stronzzi, D, Morrison, P J, & Choi, D I. Drift Wave Test Particle Transport in Reversed Shear Profile. United States. doi:10.2172/761830.
Horton, W, Park, H B, Kwon, J M, Stronzzi, D, Morrison, P J, and Choi, D I. Mon . "Drift Wave Test Particle Transport in Reversed Shear Profile". United States. doi:10.2172/761830. https://www.osti.gov/servlets/purl/761830.
@article{osti_761830,
title = {Drift Wave Test Particle Transport in Reversed Shear Profile},
author = {Horton, W and Park, H B and Kwon, J M and Stronzzi, D and Morrison, P J and Choi, D I},
abstractNote = {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 of 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.},
doi = {10.2172/761830},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {6}
}