Status of the US stellarator reactor study

Lyon, J. F.; Gulec, K.; Miller, R.L.; El-Guebaly, L.

doi:10.1016/0920-3796(94)90056-6

“…Several design studies of stellarator-type reactors have been carried out [3][4][5][6][7][8][9], In these design studies, however, the relationship between the specified confinement time and reactor parameters is not necessarily described systematically. In tokamaks, reactor design studies have been actively pursued based on the scaling laws of the accumulated experimental data of many tokamaks and the ITER (International Thermonuclear Experimental Reactor) is a representative among these activities [10,11].…”

Section: Introductionmentioning

confidence: 99%

Parameter sensitivity of the scale of stellarator-type reactors

Miyamoto

¹

1999

Plasma Phys. Control. Fusion

0

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Databases of plasmas confined by stellarator type devices have been gradually accumulated from recent experiments and several confinement scalings have been presented. Based on these confinement scalings, dependences among parameters of possible stellarator-type reactors are analysed to find the sensitivity of the scale of the reactors to parameters. When confinement time follows ISS95 scaling and LHD scaling, confinement enhancement factors of H ISS95 = 3-4 and H LHD ∼ 4 are required, respectively, for stellarator type reactors with plasma radius less than 2 m. When confinement time follows W7AS scaling, a confinement enhancement factor of H W7AS = 2-3 is necessary.

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“…Several design studies of stellarator-type reactors have been carried out [3][4][5][6][7][8][9], In these design studies, however, the relationship between the specified confinement time and reactor parameters is not necessarily described systematically. In tokamaks, reactor design studies have been actively pursued based on the scaling laws of the accumulated experimental data of many tokamaks and the ITER (International Thermonuclear Experimental Reactor) is a representative among these activities [10,11].…”

Section: Introductionmentioning

confidence: 99%

Intracavity Second-Harmonic Generation and Influence of Optical Loss of Organic Nonlinear Optical Materials

Minemoto¹,

Ozaki²,

Wakita³

et al. 1995

Jpn. J. Appl. Phys.

4

0

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Databases of plasmas confined by stellarator type devices have been gradually accumulated from recent experiments and several confinement scalings have been presented. Based on these confinement scalings, dependences among parameters of possible stellarator-type reactors are analysed to find the sensitivity of the scale of the reactors to parameters. When confinement time follows ISS95 scaling and LHD scaling, confinement enhancement factors of H ISS95 = 3-4 and H LHD ∼ 4 are required, respectively, for stellarator type reactors with plasma radius less than 2 m. When confinement time follows W7AS scaling, a confinement enhancement factor of H W7AS = 2-3 is necessary.

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Optimization of compact stellarator configuration as fusion devices

Najmabadi

¹

,

Raffray

²

,

Ku

³

et al. 2006

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Optimization of the stellarator configuration requires tradeoffs among a large number of physics parameters and engineering constraints. An integrated study of compact stellarator power plants, ARIES-CS, aims at examining these tradeoffs and defining key R&D areas. Configurations with a plasma aspect ratio of A ഛ 6 and excellent quasiaxisymmetry ͑QA͒ in both two and three field period versions were developed while reducing ␣-particle losses to Ͻ10%. Stability to linear ideal MHD modes was attained, but at the expense of reduced QA ͑and increased ␣-particle losses͒ and increased complexity of the plasma shape. Recent experimental results indicate, however, that linear MHD stability limits may not be applicable to stellarators. By utilizing a highly efficient shield-only region in strategic areas, the minimum standoff was reduced by ϳ30%. This allows a comparable reduction in the machine size. The device configuration, assembly, and maintenance procedures appear to impose severe constraints: three distinct approaches were developed, each applicable to a certain blanket concept and/or stellarator configuration. Modular coils are designed to examine the geometric complexity and to understand the constraints imposed by the maximum allowable field, desirable coil-plasma separation, coil-coil spacing, and other coil parameters. A cost-optimization system code has also been developed and will be utilized to assess the tradeoff among physics and engineering constraints in a self-consistent manner in the final phase of the ARIES-CS study.

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Status of the US stellarator reactor study

Cited by 6 publications

References 15 publications

Parameter sensitivity of the scale of stellarator-type reactors

Parameter sensitivity of the scale of stellarator-type reactors

Intracavity Second-Harmonic Generation and Influence of Optical Loss of Organic Nonlinear Optical Materials

Optimization of compact stellarator configuration as fusion devices

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