Two-component, multiple-mirror reactor with depressed ion temperature

Yang, Shali; Lieberman, M. A.

doi:10.1088/0029-5515/18/7/008

Cited by 7 publications

(14 citation statements)

References 11 publications

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“…Yang and Lieberman, in a second paper [6], considered the operation of MMR in the wetwoodburner mode (pure-T background plasma) with depressed ion temperature. In the wetwood-burner mode, the fusion power is produced by reactions between plasma T and beam D ions.…”

Section: Introductionmentioning

confidence: 99%

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Parameter optimizations of multiple-mirror reactors

1983

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The diffusion density profile model for multiple-mirror devices is limited to machines with a large number of cells and high mirror ratios. A new discrete staircase density profile model, without those limitations, has been developed. This model, along with the diffusion model, has been used to study the parameters of steady-state multiple-mirror reactors. A linear fusion device consisting of a central solenoid and multiple mirrors at each end has been considered. The magnetic field is taken to be produced by a solenoid and mirror-quadrupole assemblies which produce an average-minimum-B stable configuration. Different means of supplying the re-circulating power, including high-energy neutral-D injectors, are considered. Distribution functions of alpha particles and beam particles in this machine have been calculated. Trade-offs among the length of the machine, Q = fusion power/beam power, and other machine parameters in two different operating modes: wetwood burner (pure-T plasma background) and conventional (T and D background plasma) have been studied. It is found that the staircase density profile results in shorter reactors with a larger number of cells, compared to those of the diffusion-determined density profile.

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Section: Introductionmentioning

confidence: 99%

“…They assumed a blanket with the blanket multiplication ratio of 1.5 (24. 6 MeV per fusion reaction).…”

Section: Introductionmentioning

confidence: 99%

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Parameter optimizations of multiple-mirror reactors

1983

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“…In other words, T s / 2 < 0 . 8 3 W 0 (16) and, as follows from the lower curve in Fig. 3, for T > 3 keV the escaping a-particles in transit do not have time to transfer their energy to the plasma.…”

Section: Fig 3 Limits Of Applicability Of the Model Under Considerati...mentioning

confidence: 80%

“…The other concept, developed at the University of California, Berkeley (Refs [4,15,16]), deals with a stationary reactor with a plasma confined by a magnetic field (0 < 1) in the transverse direction. The relevant problem of MHD-instability, which is absent in the case of a dense plasma confined by walls, is believed to be solved through a complex magnetic system which suppresses the instability [17,18].…”

Section: Introductionmentioning

confidence: 99%

A pulsed multi-mirror fusion reactor: longitudinal confinement

Knyazev¹,

Chebotaev²

1984

Nucl. Fusion

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The longitudinal confinement of a plasma in a pulsed multi-mirror fusion reactor is investigated. It is shown that the initial plasma energy W p per unit of reactor cross-section and the initial plasma temperature T o serve as similarity parameters. One-dimensional numerical calculations of plasma flow along the reactor axis were performed for various W p and T o and were used to determine the plasma gain function QE(W P , T o ). The region of maximum values of QE lies near T o = 5 keV for all W p . Plasma heating by a-particles becomes substantial for values of Q exceeding unity. At W p = 20 MJcm" 2 , QE calculated with plasma heating by a-particles exceeds QE as calculated without including such heating by a factor of five. If the mirror ratio is increased by enlarging the cross-section towards the reactor ends, Q is further increased by a factor of two. A value of QE = 1 is achieved at an initial plasma energy of W p « 5 MJ-cm" 2 , and QE = 10 is achieved for W p «12MJ-cm" 2 .

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Radial losses in high-β multiple mirror plasmas

Tuszewski¹

1981

The Physics of Fluids

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The importance of radial losses in collisional multiple mirror confinement is investigated for arbitrary values of β. Classical radial diffusion and complete fluid stability are assumed. Analytical and numerical solutions of the coupled axial and radial diffusion problem are found. The results can be characterized in terms of a single parameter α∼(τz/τx)1/2 where τz and τx are average values of the axial and radial confinement times. Radial losses are unimportant for α≲0.5 and improvement in overall confinement can be achieved by increasing β for these small values of α. When applied to existing reactor designs, the theory shows that radial losses are significant for one-component reactors but can be made negligible for two-component (wetwood burner) reactors.

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Two-component, multiple-mirror reactor with depressed ion temperature

Cited by 7 publications

References 11 publications

Parameter optimizations of multiple-mirror reactors

Parameter optimizations of multiple-mirror reactors

A pulsed multi-mirror fusion reactor: longitudinal confinement

Radial losses in high-β multiple mirror plasmas

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