Pieges a plasma sans fuites

Consoli, T.

doi:10.1016/0031-9163(63)90318-4

Cited by 8 publications

(3 citation statements)

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“…43) [7]. Nevertheless the gradients V,, [( 1 E+) 2 ] and V,, [( x E~f] can be used for force interaction so that their directions are changed where o>=| e cu c | [27,18,19]. The transverse linearly polarized wave X E± can inhibit the escape of both components of plasma along a line of force [7,20].…”

Section: Discussionmentioning

confidence: 99%

MHD theory of stationary interaction between a high-frequency field and a plasma in non-homogeneous fields

Teichmann

1965

Nucl. Fusion

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Using the MHD (magneto-hydrodynamic) model of the three-component plasma, we discuss the forces affecting unit volume of an unbounded plasma in a space occupied by generally nonuniform high-frequency and magnetostatic fields. In the metric defined by the geometry of the magnetic field lines, we derive the forces affecting the three-fluid plasma arising from a high-frequency field with a high 1 E/1 H ratio. Effects of collisions among plasma components and viscosity are included. The solution has been obtained by applying the method of successive approximations. Similarly, anisotropic plasma is studied in the collision-free approximation. Stationary hf forces in fundamental field configurations are quantitatively discussed; there are some characteristic effects in fields with curved field lines. The role of the temperature correction is discussed. The hf forces, especially near the cyclotron frequencies, can be used for the limitation of plasma escape along magnetic lines and for the acceleration and injection of plasma in nonuniform magnetostatic fields. The possibilities of the application in magnetic traps are demonstrated by some examples.

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Section: Discussionmentioning

confidence: 99%

MHD theory of stationary interaction between a high-frequency field and a plasma in non-homogeneous fields

Teichmann

1965

Nucl. Fusion

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“…fields partially plug the mirror loss cone. This concept has been examined theoretically and experimentally by Consoli and co-workers [3] and has been reviewed in considerable detail by Motz and Watson [4], The conclusion of the latter workers was that the losses would still be prohibitive, unless an enhancement of the quasipotential restoring force could be achieved by applying a frequency close to cyclotron resonance. This concept, developed in considerable detail by Watson, is subject to the constraint that the particle motion be adiabatic in the quasi-potential.…”

Section: Introductionmentioning

confidence: 99%

Adiabaticity limits to radio-frequency-augmented magnetic-mirror confinement

Lichtenberg

Berk

1975

Nucl. Fusion

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The effect of adiabaticity and superadiabaticity limitations on the use of radio-frequency-augmented magnetic-mirror confinement is examined. It is shown that the scaling of the region over which the r. f. fields are applied to maintain a given level of adiabaticity is such that, although the fields decrease as resonance is approached, the total r. f. energy stored in the resonance region remains constant. Assuming that the dissipation is proportional to the energy stored, we conclude that the external energy supplied is not reduced from the energy requirements of non-resonant r. f. containment. In fact, the weak additional scaling required to maintain containment by superadiabaticity implies that resonant r. f. containment requires more applied power. The stochastic heating, resulting from the small-phase uncorrelated energy changes occurring on each pass through resonance, when superadiabaticity is not satisfied, is such that only a small improvement in the field strength required for containment can be made by operating in this mode.

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“…From the form of Eqs. (4) and (5) for c r f and Mrf it may be seen that, within the zone of adiabaticity, the initial azimuthal phase <p is of no importance. As the edge of this zone is approached, however, the magnitudes and periods of the fluctuations in these invariants were found to depend on phase, and correspondingly the limit of onset of nonadiabaticity is smeared into a phase-dependent band which is too narrow to represent in Fig.…”

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confidence: 96%