Numerical computation of the transport matrix in toroidal plasma with a stochastic magnetic field

2018 ◽  
Vol 25 (4) ◽  
pp. 042501
Author(s):  
Siqiang Zhu ◽  
Dunqiang Chen ◽  
Zongliang Dai ◽  
Shaojie Wang
Keyword(s):  
Magnetic Field ◽  
Numerical Computation ◽  
Toroidal Plasma ◽  
Stochastic Magnetic Field

Stochastic magnetic field lines diffusion in a toroidal configuration (Tokamak)

2000 ◽  
Vol 12 (2) ◽  
pp. 145-153 ◽  
Author(s):  
R. Tabet ◽  
H. Imrane ◽  
D. Saifaoui ◽  
A. Dezairi ◽  
F. Miskane
Keyword(s):  
Magnetic Field ◽  
Field Lines ◽  
Stochastic Magnetic Field

Electron Heat Transport Measured in a Stochastic Magnetic Field

2003 ◽  
Vol 91 (4) ◽  
Author(s):  
T. M. Biewer ◽  
C. B. Forest ◽  
J. K. Anderson ◽  
G. Fiksel ◽  
B. Hudson ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Heat Transport ◽  
Electron Heat ◽  
Stochastic Magnetic Field

scholarly journals Исследования альфвеновских мод на токамаке Глобус-М2 с использованием многочастотного допплеровского рефлектометра V-диапазона

2021 ◽  
Vol 47 (4) ◽  
pp. 41
Author(s):  
В.В. Буланин ◽  
И.М. Балаченков ◽  
В.И. Варфоломеев ◽  
В.К. Гусев ◽  
Г.С. Курскиев ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Doppler Frequency ◽  
Spherical Tokamak ◽  
Frequency Shifts ◽  
Toroidal Plasma ◽  
V Band ◽  
New Information ◽  
Spectral Components ◽  
Central Regions ◽  
Doppler Frequency Shifts

New information on the development of Alfvén modes in the Globus-M2 spherical tokamak is presented. The data were obtained using a V-band Doppler reflectometer with probing radiation frequencies from 50 to 75 GHz. A microwave harmonic synthesizer was used as a multifrequency probing source. As a result of using a new reflectometer, the localization of the toroidal Alfvén eigenmode has been determined at a magnetic field of 0.5 T. The spectral components of the Alfvén mode with Doppler frequency shifts due to toroidal plasma rotation have been recorded. The so-called Alfvén cascades have been investigated in the central regions of the discharge.

scholarly journals Instabilities of Magnetic Fields in Stars

1974 ◽  
Vol 59 ◽  
pp. 177-177
Author(s):  
R. J. Tayler
Keyword(s):  
Magnetic Field ◽  
Gravitational Potential ◽  
Rotation Period ◽  
Region Of Interest ◽  
Alfven Wave ◽  
Closed Field ◽  
Toroidal Plasma ◽  
Wide Range ◽  
Field Lines ◽  
Rotating Star

It has been shown (Markey and Tayler, 1973; Tayler, 1973; Wright, 1973) that a wide range of simple magnetic field configurations in stars are unstable. Although the ultimate effect of the instabilities is unclear, it seems likely that they would lead to enhanced destruction of magnetic flux, so that magnetic field decay would be much more rapid than previously supposed. Instability is almost certain in a non-rotating star containing either a purely toroidal field or a purely poloidal field, which has closed field lines inside the star. In both cases the instability resembles the well known instabilities of cylindrical and toroidal current channels, modified by the constraint that motion must be almost entirely along surfaces of constant gravitational potential.If both toroidal and poloidal fields are present, the problem is more complicated. In a toroidal plasma with a helical field, the worst instabilities are also helical but it is impossible for a helical disturbance to be parallel to a surface of constant gravitational potential everywhere. As a result, the admixture of toroidal and poloidal fields has a stabilizing influence, but it is not at present clear whether the majority of such configurations are completely stable.The effect of rotation has not yet been studied but it will certainly be important if the rotation period is less than the time taken for an Alfvén wave to cross the region of interest. This is true in most stars unless the internal magnetic field is very much stronger than any observed field.

scholarly journals Analysis Method for the Low-Order Resistive Interchange Instability in LHD with Stochastic Magnetic Field Line Structure

2013 ◽  
Vol 8 (0) ◽  
pp. 2403157-2403157 ◽  
Author(s):  
Ryosuke UEDA ◽  
Masahiko SATO ◽  
Kiyomasa WATANABE ◽  
Yutaka MATSUMOTO ◽  
Yasuhiro SUZUKI ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Line ◽  
Magnetic Field Line ◽  
Analysis Method ◽  
Line Structure ◽  
Interchange Instability ◽  
Stochastic Magnetic Field ◽  
Low Order

Toroidal plasma reactor with a low external magnetic field

1993 ◽  
Vol 33 (2) ◽  
pp. 237-249
Author(s):  
A.D Beklemishev ◽  
V.A Gordin ◽  
R.R Khayrutdinov ◽  
V.I Petviashvili ◽  
T Tajima
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Plasma Reactor ◽  
Toroidal Plasma
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