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Title: Self-organized T e Redistribution during Driven Reconnection Processes in High Temperature Plasmas

Abstract

Two-dimensional (2-D) images of electron temperature fluctuations with a high temporal and spatial resolution were employed to study the sawtooth oscillation in TEXTOR tokamak plasmas. The new findings are: (1) 2-D images revealed that the reconnection is localized and permitted the determination of the physical dimensions of the reconnection zone in the poloidal and toroidal planes. (2) The combination of a pressure driven mode and a kink instability leads to an "X-point" reconnection process. (3) Reconnection can take place anywhere along the q~1 rational magnetic surface (both high and low field sides). (4) Heat flow from the core to the outside of the inversion radius during the reconnection time is highly asymmetric and the behavior is collective. These new findings are compared with the characteristics of various theoretical models and experimental results for the study of the sawtooth oscillation in tokamak plasmas.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
Contributing Org.:
TEXTOR Team
OSTI Identifier:
934602
Report Number(s):
PPPL-4134
TRN: US0804645
DOE Contract Number:  
AC02-76CH03073
Resource Type:
Technical Report
Resource Relation:
Related Information: Published in: Phys. Plasmas 13, 055907 (2006)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; DIMENSIONS; ELECTRON TEMPERATURE; FLUCTUATIONS; HEAT FLUX; KINK INSTABILITY; MAGNETIC SURFACES; SAWTOOTH OSCILLATIONS; SPATIAL RESOLUTION; TEXTOR TOKAMAK; plasma temperature, plasma fluctuations, plasma magnetohydrodynamics, sawtooth instability, plasma oscillations, Tokamak devices, plasma toroidal confinement, plasma pressure, kink instability, plasma transport processes

Citation Formats

Park, H. K., Mazzucato, E., Luhmann, Jr., N. C., Domier, C. W., Xia, Z., Munsat, T., Donne, A. J.H., Classen, I. G.J., and van de Pol, M. J. Self-organized Te Redistribution during Driven Reconnection Processes in High Temperature Plasmas. United States: N. p., 2005. Web. doi:10.2172/934602.
Park, H. K., Mazzucato, E., Luhmann, Jr., N. C., Domier, C. W., Xia, Z., Munsat, T., Donne, A. J.H., Classen, I. G.J., & van de Pol, M. J. Self-organized Te Redistribution during Driven Reconnection Processes in High Temperature Plasmas. United States. doi:10.2172/934602.
Park, H. K., Mazzucato, E., Luhmann, Jr., N. C., Domier, C. W., Xia, Z., Munsat, T., Donne, A. J.H., Classen, I. G.J., and van de Pol, M. J. Thu . "Self-organized Te Redistribution during Driven Reconnection Processes in High Temperature Plasmas". United States. doi:10.2172/934602. https://www.osti.gov/servlets/purl/934602.
@article{osti_934602,
title = {Self-organized Te Redistribution during Driven Reconnection Processes in High Temperature Plasmas},
author = {Park, H. K. and Mazzucato, E. and Luhmann, Jr., N. C. and Domier, C. W. and Xia, Z. and Munsat, T. and Donne, A. J.H. and Classen, I. G.J. and van de Pol, M. J.},
abstractNote = {Two-dimensional (2-D) images of electron temperature fluctuations with a high temporal and spatial resolution were employed to study the sawtooth oscillation in TEXTOR tokamak plasmas. The new findings are: (1) 2-D images revealed that the reconnection is localized and permitted the determination of the physical dimensions of the reconnection zone in the poloidal and toroidal planes. (2) The combination of a pressure driven mode and a kink instability leads to an "X-point" reconnection process. (3) Reconnection can take place anywhere along the q~1 rational magnetic surface (both high and low field sides). (4) Heat flow from the core to the outside of the inversion radius during the reconnection time is highly asymmetric and the behavior is collective. These new findings are compared with the characteristics of various theoretical models and experimental results for the study of the sawtooth oscillation in tokamak plasmas.},
doi = {10.2172/934602},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2005},
month = {Thu Dec 01 00:00:00 EST 2005}
}

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