%0 Journal Article %1 ishizawa.2003 %A Ishizawa, A. %A Sato, M. %A Wakatani, M. %D 2003 %I AIP %J Physics of Plasmas %K current_hole current_reversal r-mhd reconnection tokamak %N 7 %P 3017-3019 %R 10.1063/1.1578074 %T Electron inertia effects on $m = 1$ instability in a cylindrical tokamak with a negative central current %U http://link.aip.org/link/?PHP/10/3017/1 %V 10 %X The formation of a current hole by a series of nonlinear $m = 1$ magnetic reconnections due to electron inertia in a tokamak is demonstrated numerically. If a negative current exists around the magnetic axis of a tokamak plasma, an unstable $m = 1$ magnetic reconnection shifts the negative current outward but a nonlinear secondary magnetic reconnection induced by electron inertia attempts to recover the initial current profile. A partially recovered current profile is again unstable to the $m = 1$ mode and therefore subject to a subsequent nonlinear magnetic reconnection. Through such repeated magnetic reconnections, it is shown that the negative current density is gradually diminished, thus forming a current hole.

@article{ishizawa.2003, abstract = {The formation of a current hole by a series of nonlinear $m = 1$ magnetic reconnections due to electron inertia in a tokamak is demonstrated numerically. If a negative current exists around the magnetic axis of a tokamak plasma, an unstable $m = 1$ magnetic reconnection shifts the negative current outward but a nonlinear secondary magnetic reconnection induced by electron inertia attempts to recover the initial current profile. A partially recovered current profile is again unstable to the $m = 1$ mode and therefore subject to a subsequent nonlinear magnetic reconnection. Through such repeated magnetic reconnections, it is shown that the negative current density is gradually diminished, thus forming a current hole.}, added-at = {2009-07-31T14:31:33.000+0200}, author = {Ishizawa, A. and Sato, M. and Wakatani, M.}, biburl = {https://www.bibsonomy.org/bibtex/2816a9ae1553543eb341ba87727f938c1/prodrigues}, description = {Axisymmetric reconnection via electron inertia instead of finite resistivity.}, doi = {10.1063/1.1578074}, interhash = {d91252139aae8408b6a0eaa97bd0b5ae}, intrahash = {816a9ae1553543eb341ba87727f938c1}, journal = {Physics of Plasmas}, keywords = {current_hole current_reversal r-mhd reconnection tokamak}, month = {July}, number = 7, numpages = {3}, pages = {3017-3019}, publisher = {AIP}, timestamp = {2009-07-31T14:31:33.000+0200}, title = {Electron inertia effects on $m = 1$ instability in a cylindrical tokamak with a negative central current}, url = {http://link.aip.org/link/?PHP/10/3017/1}, volume = 10, year = 2003 }