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Computational study of the internal ...

Lukin, Vyacheslav S.

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Computational study of the internal kink mode evolution and associated magnetic reconnection phenomena.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Computational study of the internal kink mode evolution and associated magnetic reconnection phenomena./
Author:	Lukin, Vyacheslav S.
Description:	247 p.
Notes:	Adviser: Stephen C. Jardin.
Contained By:	Dissertation Abstracts International68-12B.
Subject:	Computer Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3295307
ISBN:	9780549401124

Computational study of the internal kink mode evolution and associated magnetic reconnection phenomena.
Lukin, Vyacheslav S.

Computational study of the internal kink mode evolution and associated magnetic reconnection phenomena. - 247 p.

Adviser: Stephen C. Jardin.

Thesis (Ph.D.)--Princeton University, 2008.

Numerical study of plasma relaxation and self-organization in two-dimensional incompressible magnetohydrodynamic (MHD) systems is presented. A large semi-periodic tearing unstable reversed magnetic field configuration in flat Cartesian geometry and a driven tokamak-like kink-unstablescrew pinch in helical geometry are considered. Special emphasis is made on the coupling between global and local scales by way of magnetic reconnection. The influence of the global system's size and geometry on the magnetic reconnection phenomenon and associated current sheet dynamics are evaluated in different collisionality regimes. Questions of plasmoid formation by way of current sheet break-up and onset of fast reconnection in a semi-collisional regime are investigated. Visco-resistive, electron and Hall MHD plasma fluid models are employed in the study. In helical geometry, application of Ohmic current drive to the periodic screw-pinch with large axial magnetic field and hollow resistivity profile are shown to result in "sawtooth-like" limit cycle behavior which is independent of the exact initial conditions. Incomplete reconnection saw-teeth, maintaining the value of safety factor q in the central plasma region below unity throughout the cycle, are demonstrated for the first time in numerical simulations. Sensitivity of sawtooth characteristics to a number of plasma parameters is evaluated. The initial value problems described above are solved with an adaptive fully implicit parallel macroscopic modeling code SEL, which is capable of evolving a large range of extended MHD equations. The structure, key features, and thorough testing of the code are described in detail.

ISBN: 9780549401124Subjects--Topical Terms:

626642
Computer Science.

Computational study of the internal kink mode evolution and associated magnetic reconnection phenomena.
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020 $a 9780549401124
035 $a (UMI)AAI3295307
035 $a AAI3295307
040 $a UMI $c UMI
100 1 $a Lukin, Vyacheslav S. $3 1286060
245 1 0 $a Computational study of the internal kink mode evolution and associated magnetic reconnection phenomena.
300 $a 247 p.
500 $a Adviser: Stephen C. Jardin.
500 $a Source: Dissertation Abstracts International, Volume: 68-12, Section: B, page: 8097.
502 $a Thesis (Ph.D.)--Princeton University, 2008.
520 $a Numerical study of plasma relaxation and self-organization in two-dimensional incompressible magnetohydrodynamic (MHD) systems is presented. A large semi-periodic tearing unstable reversed magnetic field configuration in flat Cartesian geometry and a driven tokamak-like kink-unstablescrew pinch in helical geometry are considered. Special emphasis is made on the coupling between global and local scales by way of magnetic reconnection. The influence of the global system's size and geometry on the magnetic reconnection phenomenon and associated current sheet dynamics are evaluated in different collisionality regimes. Questions of plasmoid formation by way of current sheet break-up and onset of fast reconnection in a semi-collisional regime are investigated. Visco-resistive, electron and Hall MHD plasma fluid models are employed in the study. In helical geometry, application of Ohmic current drive to the periodic screw-pinch with large axial magnetic field and hollow resistivity profile are shown to result in "sawtooth-like" limit cycle behavior which is independent of the exact initial conditions. Incomplete reconnection saw-teeth, maintaining the value of safety factor q in the central plasma region below unity throughout the cycle, are demonstrated for the first time in numerical simulations. Sensitivity of sawtooth characteristics to a number of plasma parameters is evaluated. The initial value problems described above are solved with an adaptive fully implicit parallel macroscopic modeling code SEL, which is capable of evolving a large range of extended MHD equations. The structure, key features, and thorough testing of the code are described in detail.
590 $a School code: 0181.
650 4 $a Computer Science. $3 626642
650 4 $a Physics, Astronomy and Astrophysics. $3 1019521
650 4 $a Physics, Fluid and Plasma. $3 1018402
690 $a 0606
690 $a 0759
690 $a 0984
710 2 $a Princeton University. $3 645579
773 0 $t Dissertation Abstracts International $g 68-12B.
790 $a 0181
790 1 0 $a Jardin, Stephen C., $e advisor
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3295307