Transport Processes in Axisymmetric Open Traps

Ryutov, D. D.; Stupakov, G.

doi:10.1007/978-1-4613-1777-7_2

Cited by 40 publications

(76 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many of the basic notions involved in our theory were developed in early studies of radial transport in tandem mirrors, [10][11][12][13][14] where static asymmetric end cells produced radial grad-B drifts that largely determined the radial particle flux. A key prediction of both theories is that the resulting transport will be dominated by particles whose axial bounce motion and azimuthal drift motion causes them to move in resonance with the asymmetry.…”

Section: Introductionmentioning

confidence: 99%

Theory of asymmetry-induced transport in a non-neutral plasma

Eggleston

O’Neil

1999

Physics of Plasmas

View full text Add to dashboard Cite

Radial transport produced by static nonaxisymmetric fields is thought to limit the confinement of non-neutral plasmas and experiments with applied asymmetries have verified that such fields do produce transport. A theoretical model of such transport is presented which is appropriate for long, thin plasmas. The theory allows for asymmetries with nonzero frequency and includes the linear collective response to applied wall voltages. For the regime where the effective collision frequency is large, the asymmetry-induced radial particle flux is derived from the drift kinetic/Poisson equations including collisions. For low collision frequencies a heuristic derivation is given. In both regimes the resulting transport is dominated by particles that move in resonance with the asymmetry. Possible applications of the theory to several experiments are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Theory of asymmetry-induced transport in a non-neutral plasma

Eggleston

O’Neil

1999

Physics of Plasmas

View full text Add to dashboard Cite

show abstract

“…These low density results [as well as the G͑r͒~r m u results discussed above] suggest that shielding and other collective plasma effects are not essential to the R 22 transport process. Motivated by the R 22 scaling and by theories of ion transport in (neutral plasma) tandem mirror machines [22,23], transport theories for low rigidity plasmas have often invoked bounce-resonant particles (i.e., m z f b m u f E ). Indeed, there has been some recent experimental evidence of bounce-resonant phenomena in pure-electron plasmas [24,25].…”

mentioning

confidence: 99%

Two Regimes of Asymmetry-Induced Transport in Non-neutral Plasmas

Kriesel

Driscoll

2000

Phys. Rev. Lett.

View full text Add to dashboard Cite

Confinement of charged particles in cylindrical Penning-Malmberg traps depends strongly on cross-magnetic-field transport induced by electric and/or magnetic asymmetries. New measurements in pure-electron plasmas demonstrate two separate transport regimes depending on the particle bounce-to-rotation ratio, or rigidity, R identical with&fmacr;(b)/f(E). For R<10, the transport scales as V(a)R-2, where V(a) is the strength of an applied electrostatic asymmetry. For R greater, similar10-20, this " R-2 transport" ceases abruptly, leaving " B-independent" transport which scales as V(2)(a) and does not depend directly on the rigidity.

show abstract

“…The question therefore arises as to whether Sr should be reduced relative to the very approximate estimate given by (41'). The most radical solution is to find fields in which the condition n-BXx = 0 is satisfied throughout the region [see (40)]. Such fields are often referred to as omnigenic.…”

Section: Loss Of Plasma Across the Magnetic Fieldmentioning

confidence: 99%

Open-ended traps

Ryutov¹

1988

Sov. Phys. Usp.

View full text Add to dashboard Cite

Transport Processes in Axisymmetric Open Traps

Cited by 40 publications

References 22 publications

Theory of asymmetry-induced transport in a non-neutral plasma

Theory of asymmetry-induced transport in a non-neutral plasma

Two Regimes of Asymmetry-Induced Transport in Non-neutral Plasmas

Open-ended traps

Contact Info

Product

Resources

About