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

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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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.\}",

year = "1998",

doi = "10.1103/PhysRevLett.80.528",

language = "English",

volume = "80",

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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

N2 - 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%.

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%.

UR - https://www.scopus.com/pages/publications/3743137674

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DO - 10.1103/PhysRevLett.80.528

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VL - 80

SP - 528

EP - 531

JO - Physical Review Letters

JF - Physical Review Letters

IS - 3

ER -

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

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