Saturation of tearing modes in reversed field pinches with locally linear force-free magnetic fields and its application to quasi-single-helicity states

2008 ◽  
Vol 15 (5) ◽  
pp. 052104 ◽  
Author(s):  
E. Tassi ◽  
F. Militello ◽  
F. Porcelli ◽  
R. J. Hastie
Keyword(s):  
Magnetic Fields ◽  
Tearing Modes ◽  
Reversed Field ◽  
Linear Force ◽  
Locally Linear

Electron transport in the stochastic fields of the reversed-field pinch

1996 ◽  
Vol 56 (1) ◽  
pp. 3-12
Author(s):  
Myung-Hee Kim ◽  
Alkesh Punjabi
Keyword(s):  
Monte Carlo ◽  
Diffusion Coefficient ◽  
Magnetic Fields ◽  
Reversed Field Pinch ◽  
Tearing Modes ◽  
The Monte Carlo Method ◽  
Magnetic Surfaces ◽  
Reversed Field ◽  
Drift Orbits ◽  
Stochastic Magnetic Fields

We employ the Monte Carlo method for the calculation of anomalous transport developed by Punjabi and Boozer to calculate the particle diffusion coefficient for electrons in the stochastic magnetic fields of the reversed-field pinch (RFP). in the Monte Carlo calculations represented here, the transport mechanism is the loss of magnetic surfaces due to resistive perturbations. The equilibrium magnetic fields are represented by the Bessel function model for the RFP. The diffusion coefficient D is calculated as a function of a, the amplitude of the perturbation. We see three regimes as the amplitude of the tearing modes is increased: the Rechester—Rosenbluth regime where D scales as a2 the anomalous regime where D scales more rapidly than a2 and the Mynick—Krornmes regime where D scales more slowly than a2. Inclusion of the effects of loop voltage on the particle drift orbits in the RFP does not affect the intervals in the amplitude a where these regimes operate.

scholarly journals Nonlinear interaction of tearing modes: A comparison between the tokamak and the reversed field pinch configurations

1985 ◽  
Vol 28 (1) ◽  
pp. 261-270 ◽  
Author(s):  
J. A. Holmes ◽  
B. A. Carreras ◽  
T. C. Hender ◽  
H. R. Hicks ◽  
V. E. Lynch ◽  
...  
Keyword(s):  
Nonlinear Interaction ◽  
Reversed Field Pinch ◽  
Tearing Modes ◽  
Reversed Field

A Test on Two Codes for Extrapolating Solar Linear Force-free Magnetic Fields

Solar Physics ◽  
2009 ◽  
Vol 260 (1) ◽  
pp. 109-124 ◽  
Author(s):  
Yiwei Li ◽  
Guoxiang Song ◽  
Junlin Li
Keyword(s):  
Magnetic Fields ◽  
Linear Force

Analysis of phase locking of tearing modes in reversed field pinch plasmas

2001 ◽  
Vol 8 (2) ◽  
pp. 516-524 ◽  
Author(s):  
P. Zanca ◽  
E. Martines ◽  
T. Bolzonella ◽  
S. Cappello ◽  
S. C. Guo ◽  
...  
Keyword(s):  
Phase Locking ◽  
Reversed Field Pinch ◽  
Tearing Modes ◽  
Reversed Field

Nonlinear dynamics of tearing modes in the reversed field pinch

1988 ◽  
Vol 31 (5) ◽  
pp. 1166 ◽  
Author(s):  
J. A. Holmes ◽  
B. A. Carreras ◽  
P. H. Diamond ◽  
V. E. Lynch
Keyword(s):  
Nonlinear Dynamics ◽  
Reversed Field Pinch ◽  
Tearing Modes ◽  
Reversed Field

Laser polarimetric measurement of equilibrium and fluctuating magnetic fields in a reversed field pinch (invited)

2003 ◽  
Vol 74 (3) ◽  
pp. 1534-1540 ◽  
Author(s):  
D. L. Brower ◽  
W. X. Ding ◽  
S. D. Terry ◽  
J. K. Anderson ◽  
T. M. Biewer ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Reversed Field Pinch ◽  
Reversed Field

Phase-locking of tearing modes in the reversed field experiment

2002 ◽  
Vol 9 (6) ◽  
pp. 2707-2724 ◽  
Author(s):  
Richard Fitzpatrick ◽  
Paolo Zanca
Keyword(s):  
Field Experiment ◽  
Phase Locking ◽  
Tearing Modes ◽  
Reversed Field

Momentum transport from tearing modes in the mst reversed field pinch

2009 ◽  
Author(s):  
A. Kuritsyn ◽  
A.F. Almagri ◽  
G. Fiksel ◽  
M.C. Miller ◽  
V.V. Mirnov ◽  
...  
Keyword(s):  
Momentum Transport ◽  
Reversed Field Pinch ◽  
Tearing Modes ◽  
Reversed Field

scholarly journals Topological study of active region 11158

2013 ◽  
Vol 8 (S300) ◽  
pp. 479-480
Author(s):  
Jie Zhao ◽  
Hui Li ◽  
Etienne Pariat ◽  
Brigitte Schmieder ◽  
Yang Guo ◽  
...  
Keyword(s):  
Active Region ◽  
Magnetic Fields ◽  
Free Field ◽  
Three Dimensional ◽  
Projection Data ◽  
Solar Dynamics Observatory ◽  
Equal Area ◽  
Linear Force ◽  
Solar Dynamics ◽  
Force Free Field

AbstractWith the cylindrical equal area (CEA) projection data from the Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observatory (SDO), we reconstructed the three-dimensional (3D) magnetic fields in the corona, using a non-linear force-free field (NLFFF) extrapolation method every 12 minutes during five days, to calculate the squashing degree factor Q in the volume. The results show that this AR has an hyperbolic flux tube (HFT) configuration, a typical topology of quadrupole, which is stable even during the two large flares (M6.6 and X2.2 class flares).

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