High-β plasma behaviour in a canted mirror

Dandl, R.A.; Eason, H.O.; England, A.C.; Sprott, Julien Clinton

doi:10.1088/0029-5515/13/5/007

Cited by 15 publications

(22 citation statements)

References 7 publications

(15 reference statements)

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“…Some data on the former technique have been obtained in the Symmetric Tandem Mirror experiment at TRW Corporation (Redondo Beach, CA). Building on extensive earlier experience with electron rings in the ELMO [327] and the EBT [328] experiments at Oak Ridge, the TRW group has demonstrated the formation of stable hot-electron rings in their device [329]. Recently, the Phaedrus group in Wisconsin has shown that stability against gross modes in an otherwise MHD-unstable TM plasma can be achieved by the use of RF ponderomotive forces [330].…”

Section: Fig 82 Experimentally Determined Interchange Stability Limit...mentioning

confidence: 99%

The magnetic mirror approach to fusion

1987

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The magnetic mirror approach to fusion is reviewed in depth. Starting with a brief chronological history of the development of the basic mirror concept, its subsequent evolution into the tandem mirror, the field reversed mirror and other variants is described. Also discussed are the many-faceted aspects of mirror theory, including adiabatic invariants, MHD equilibrium and stability, collisional processes, transport theory and microinstability theory. The review concludes with an updating of experimental results, a discussion of mirror-related technology, including neutral beam injection and direct conversion, and a brief description of design studies of mirror fusion power plants.

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Section: Fig 82 Experimentally Determined Interchange Stability Limit...mentioning

confidence: 99%

The magnetic mirror approach to fusion

1987

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“…The EBT experiment [14] is composed of 24 toroidally linked mirrors, each having a 2:1 mirror ratio. The radius of the vacuum vessel is 11 cm in the mirror throats and 25 cm in the mirror midplanes.…”

Section: Description Of the Experimentsmentioning

confidence: 99%

Ion heating in the range of high ion cyclotron harmonics on EBT

1984

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Wave heating of ions is obtained in Elmo Bumpy Torus (EBT) experiments under conditions where 18 ^.oj/Q, i ^ 3. Absorption of wave energy in the plasma centre is demonstrated. The fast magnetosonic wave is observed on electrostatically shielded loop probes placed at the edge of the plasma, but it is shown that the fast wave cannot directly heat the ions in EBT. The experiments suggest, however, that the waves that do produce the ion heating are coupled to the fast wave. The possibility that the heating is due to excitation of electrostatic waves is investigated theoretically.

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“…The EBT is described in detail in Refs [13,14]. Only facts pertinent to the ICRF heating experiments are presented here.…”

Section: Description Of the Experimentsmentioning

confidence: 99%

Heating experiments in the ion cyclotron range of frequencies on EBT-S

et al. 1983

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Heating experiments in EBT-S have been conducted in steady-state plasmas at continuous wave power levels up to 20 kW in the ion cyclotron range of frequencies (15–30 MHz). Power coupling efficiencies and wave propagation measurements have been obtained at reduced power levels over the frequency range 15–50 MHz. Wave dispersion properties are in qualitative agreement with simplified theory. Substantial ion heating is obtained in deuterium plasmas above 25 MHz, the point at which wave propagation begins. At this frequency, only the 3rd-10th ion cyclotron harmonics of deuterium are present in the core plasma. Ion heating under these circumstances is considerably greater than theoretically predicted for EBT-S parameters. A residual proton component is also heated. However, collisional energy transfer from the protons to the deuterons is too small to account for the deuteron heating. The stored energy of the relativistic electron annuli increases substantially with the application of wave power. Near the antenna, the stored energy more than doubles at a power level of 15 kW. The mechanism producing this dramatic effect is not well understood at present. A small reduction in the ambipolar electric field is also observed during wave heating.

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High-β plasma behaviour in a canted mirror

Cited by 15 publications

References 7 publications

The magnetic mirror approach to fusion

The magnetic mirror approach to fusion

Ion heating in the range of high ion cyclotron harmonics on EBT

Heating experiments in the ion cyclotron range of frequencies on EBT-S

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