It is found that no current is driven in a central region of a tokamak plasma once the central current density becomes nearly zero (``current hole''), in spite of high electric conductivity, at the current drive by a toroidal electric field and a radio-frequency wave in experiments on the JT-60U tokamak. This is a new, stiff, self-organized structure of a magnetic field in an axisymmetric toroidal plasma.
Description
Reports long-lived current holes at JT-60U and their resilience against current-drive atempts
%0 Journal Article
%1 fujita.2005
%A Fujita, T.
%A Suzuki, T.
%A Oikawa, T.
%A Isayama, A.
%A Hatae, T.
%A Naito, O.
%A Sakamoto, Y.
%A Hayashi, N.
%A Hamamatsu, K.
%A Ide, S.
%A Takenaga, H.
%D 2005
%I American Physical Society
%J Phys. Rev. Lett.
%K JT-60U current_hole current_reversal equilibrium i-mhd tokamak
%N 7
%P 075001
%R 10.1103/PhysRevLett.95.075001
%T Current Clamp at Zero Level in JT-60U Current Hole Plasmas
%U http://prola.aps.org/abstract/PRL/v95/i7/e075001
%V 95
%X It is found that no current is driven in a central region of a tokamak plasma once the central current density becomes nearly zero (``current hole''), in spite of high electric conductivity, at the current drive by a toroidal electric field and a radio-frequency wave in experiments on the JT-60U tokamak. This is a new, stiff, self-organized structure of a magnetic field in an axisymmetric toroidal plasma.
@article{fujita.2005,
abstract = {It is found that no current is driven in a central region of a tokamak plasma once the central current density becomes nearly zero (``current hole''), in spite of high electric conductivity, at the current drive by a toroidal electric field and a radio-frequency wave in experiments on the JT-60U tokamak. This is a new, stiff, self-organized structure of a magnetic field in an axisymmetric toroidal plasma.},
added-at = {2009-09-16T18:39:11.000+0200},
author = {Fujita, T. and Suzuki, T. and Oikawa, T. and Isayama, A. and Hatae, T. and Naito, O. and Sakamoto, Y. and Hayashi, N. and Hamamatsu, K. and Ide, S. and Takenaga, H.},
biburl = {https://www.bibsonomy.org/bibtex/2614d531ba3800f0a4b4656b85df60319/prodrigues},
description = {Reports long-lived current holes at JT-60U and their resilience against current-drive atempts},
doi = {10.1103/PhysRevLett.95.075001},
interhash = {ef2eca97821c3152a2ca74e3453b9255},
intrahash = {614d531ba3800f0a4b4656b85df60319},
journal = {Phys. Rev. Lett.},
keywords = {JT-60U current_hole current_reversal equilibrium i-mhd tokamak},
month = Aug,
number = 7,
numpages = {4},
pages = 075001,
publisher = {American Physical Society},
timestamp = {2009-09-16T18:39:11.000+0200},
title = {Current Clamp at Zero Level in JT-60U Current Hole Plasmas},
url = {http://prola.aps.org/abstract/PRL/v95/i7/e075001},
volume = 95,
year = 2005
}