Different techniques for investigation of plasma diffusion coefficient in IR-T1 Tokamak

2017 ◽  
Author(s):  
Mahmood Ghoranneviss ◽  
Sakineh Meshkani ◽  
Mansoureh Lafouti
Keyword(s):  
Diffusion Coefficient ◽  
Plasma Diffusion

Novel Technique for Direct Measurement of the Plasma Diffusion Coefficient in Magnetized Plasma

2008 ◽  
Vol 48 (5-7) ◽  
pp. 418-423 ◽  
Author(s):  
J. Brotánková ◽  
E. Martines ◽  
J. Adámek ◽  
J. Stöckel ◽  
G. Popa ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Direct Measurement ◽  
Magnetized Plasma ◽  
Novel Technique ◽  
Plasma Diffusion

Ambipolar Drift, Deformation, and Diffusion of a Plasma in a Magnetic Field

1973 ◽  
Vol 51 (5) ◽  
pp. 564-573 ◽  
Author(s):  
Richard L. Monroe
Keyword(s):  
Magnetic Field ◽  
Diffusion Coefficient ◽  
Effective Magnetic Field ◽  
Theoretical Problem ◽  
Direction Parallel ◽  
Transverse Diffusion ◽  
Weakly Ionized ◽  
Plasma Diffusion ◽  
Ambipolar Drift ◽  
And Diffusion

The theoretical problem of a weakly ionized, constant temperature, three particle plasma in an externally generated magnetic field is reformulated by transforming the set of 14 macroscopic plasma equations (continuity and momentum equations for ions and electrons plus Maxwell's equations) in 14 unknowns (ion and electron number densities and velocities plus the effective electric and magnetic fields) into an equivalent set of 4 integral equations in 4 unknowns. In the course of this transformation, it is shown that the plasma behavior can be interpreted in terms of three ambipolar processes : drift, deformation, and diffusion. Plasma diffusion is characterized by two diffusion coefficients : the usual Schottky formula applying in the direction parallel to the effective magnetic field and a new expression for the ambipolar transverse diffusion coefficient applying in directions perpendicular to the effective magnetic field. The new ambipolar coefficient differs markedly from the familiar ambipolar coefficient associated with the names of Bickerton, Lehnert, Holway, Allis, and Buchsbaum; and, in general, it gives values for the transverse diffusion coefficient which are two orders of magnitude larger than those given by the latter. It is concluded that ambipolar diffusion can produce a transverse diffusion coefficient large enough to account for the diffusion rates measured by Bohm, Burhop, Massey, and Williams in argon arc discharges.

Das passive Problem der anomalen Plasma-Diffusion / The Passive Problem of Anomalous Plasma Diffusion

1982 ◽  
Vol 37 (8) ◽  
pp. 785-794
Author(s):  
Klaus Elsässer
Keyword(s):  
Diffusion Coefficient ◽  
Turbulent Convection ◽  
Magnetic Fluctuations ◽  
Correlation Lengths ◽  
Toroidal Plasma ◽  
Ensemble Mean ◽  
Plasma Diffusion ◽  
Order Of Magnitude ◽  
Two Space Dimensions ◽  
Perturbative Treatment

The diffusion of magnetic lines of force in a toroidal plasma is equivalent within a perturbative treatment, to the problem of turbulent convection in two space dimensions. Neglecting a triplecorrelation the diffusion coefficient D is, therefore, given as a spectral and ensemble mean of the Green’s function, and the following order of magnitude is obtained:Dxx ≈ Min(L0 |B̃x|2/B02, l0\B̃x\/B0),where L0 and l0 are the (Eulerian) correlation lengths of the magnetic fluctuations B̃ parallel and perpendicular to the unperturbed field B0, respectively

Brief-Measurements of Vapor Diffusion Coefficient

1954 ◽  
Vol 46 (11) ◽  
pp. 47-49 ◽  
Author(s):  
C.Y. Lee ◽  
C.R. Wilke
Keyword(s):  
Diffusion Coefficient ◽  
Vapor Diffusion
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