Transport optimization and mhd stability of a small aspect ratio toroidal hybrid stellarator

S. P. Hirshman; D. A. Spong; J. C. Whitson; V. E. Lynch; D. B. Batchelor; B. A. Carreras; J. A. Rome

doi:10.1103/PhysRevLett.80.528

Transport optimization and mhd stability of a small aspect ratio toroidal hybrid stellarator

S. P. Hirshman, D. A. Spong, J. C. Whitson, V. E. Lynch, D. B. Batchelor, B. A. Carreras, J. A. Rome

Plasma Theory and Modeling

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

A class of small aspect ratio(A)stellarators is found that does not rely on quasisymmetrization to achieve good confinement. These systems depart from canonical stellarators by allowing a small net plasma current. An optimization procedure with bounce-averaged omnigeneity and other desirable physical properties as target criteria is described and applied to show the existence of a compact plasma device having A ≲ 3, highβ(ratio of thermal energy to magnetic field energy), and low plasma current. The added design flexibility afforded by the plasma current leads to an attractive low-A hybrid device which is stable to magnetohydrodynamic ballooning modes for(β)<6%.

Original language	English
Pages (from-to)	528-531
Number of pages	4
Journal	Physical Review Letters
Volume	80
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.80.528
State	Published - 1998

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10.1103/PhysRevLett.80.528

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title = "Transport optimization and mhd stability of a small aspect ratio toroidal hybrid stellarator",

abstract = "A class of small aspect ratio(A)stellarators is found that does not rely on quasisymmetrization to achieve good confinement. These systems depart from canonical stellarators by allowing a small net plasma current. An optimization procedure with bounce-averaged omnigeneity and other desirable physical properties as target criteria is described and applied to show the existence of a compact plasma device having A ≲ 3, highβ(ratio of thermal energy to magnetic field energy), and low plasma current. The added design flexibility afforded by the plasma current leads to an attractive low-A hybrid device which is stable to magnetohydrodynamic ballooning modes for(β)<6%.",

author = "Hirshman, {S. P.} and Spong, {D. A.} and Whitson, {J. C.} and Lynch, {V. E.} and Batchelor, {D. B.} and Carreras, {B. A.} and Rome, {J. A.}",

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T1 - Transport optimization and mhd stability of a small aspect ratio toroidal hybrid stellarator

AU - Hirshman, S. P.

AU - Spong, D. A.

AU - Whitson, J. C.

AU - Lynch, V. E.

AU - Batchelor, D. B.

AU - Carreras, B. A.

AU - Rome, J. A.

PY - 1998

Y1 - 1998

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AB - A class of small aspect ratio(A)stellarators is found that does not rely on quasisymmetrization to achieve good confinement. These systems depart from canonical stellarators by allowing a small net plasma current. An optimization procedure with bounce-averaged omnigeneity and other desirable physical properties as target criteria is described and applied to show the existence of a compact plasma device having A ≲ 3, highβ(ratio of thermal energy to magnetic field energy), and low plasma current. The added design flexibility afforded by the plasma current leads to an attractive low-A hybrid device which is stable to magnetohydrodynamic ballooning modes for(β)<6%.

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SP - 528

EP - 531

JO - Physical Review Letters

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IS - 3

ER -

Transport optimization and mhd stability of a small aspect ratio toroidal hybrid stellarator

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