Internal transport barrier driven by redistribution of energetic ions

K. L. Wong; W. W. Heidbrink; E. Ruskov; C. C. Petty; C. M. Greenfield; R. Nazikian; R. Budny

doi:10.1088/0029-5515/45/1/004

Internal transport barrier driven by redistribution of energetic ions

K. L. Wong, W. W. Heidbrink, E. Ruskov, C. C. Petty, C. M. Greenfield, R. Nazikian, R. Budny

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31 Scopus citations

Abstract

Alfvén instabilities excited by energetic ions are used as a means to reduce the central magnetic shear in a tokamak via redistribution of energetic ions. When the central magnetic shear is low enough, ballooning modes become stable for any plasma pressure gradient and an internal transport barrier (ITB) with a steep pressure gradient can exist. This mechanism can sustain a steady-state ITB as demonstrated by experimental data from the DIII-D tokamak. It can also produce a shear in toroidal and poloidal plasma rotation. Possible application of this technique to use the energetic α particles for improvement of burning plasma performance is discussed.

Original language	English
Pages (from-to)	30-39
Number of pages	10
Journal	Nuclear Fusion
Volume	45
Issue number	1
DOIs	https://doi.org/10.1088/0029-5515/45/1/004
State	Published - Jan 2005
Externally published	Yes

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title = "Internal transport barrier driven by redistribution of energetic ions",

abstract = "Alfv{\'e}n instabilities excited by energetic ions are used as a means to reduce the central magnetic shear in a tokamak via redistribution of energetic ions. When the central magnetic shear is low enough, ballooning modes become stable for any plasma pressure gradient and an internal transport barrier (ITB) with a steep pressure gradient can exist. This mechanism can sustain a steady-state ITB as demonstrated by experimental data from the DIII-D tokamak. It can also produce a shear in toroidal and poloidal plasma rotation. Possible application of this technique to use the energetic α particles for improvement of burning plasma performance is discussed.",

author = "Wong, {K. L.} and Heidbrink, {W. W.} and E. Ruskov and Petty, {C. C.} and Greenfield, {C. M.} and R. Nazikian and R. Budny",

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AU - Wong, K. L.

AU - Heidbrink, W. W.

AU - Ruskov, E.

AU - Petty, C. C.

AU - Greenfield, C. M.

AU - Nazikian, R.

AU - Budny, R.

PY - 2005/1

Y1 - 2005/1

N2 - Alfvén instabilities excited by energetic ions are used as a means to reduce the central magnetic shear in a tokamak via redistribution of energetic ions. When the central magnetic shear is low enough, ballooning modes become stable for any plasma pressure gradient and an internal transport barrier (ITB) with a steep pressure gradient can exist. This mechanism can sustain a steady-state ITB as demonstrated by experimental data from the DIII-D tokamak. It can also produce a shear in toroidal and poloidal plasma rotation. Possible application of this technique to use the energetic α particles for improvement of burning plasma performance is discussed.

AB - Alfvén instabilities excited by energetic ions are used as a means to reduce the central magnetic shear in a tokamak via redistribution of energetic ions. When the central magnetic shear is low enough, ballooning modes become stable for any plasma pressure gradient and an internal transport barrier (ITB) with a steep pressure gradient can exist. This mechanism can sustain a steady-state ITB as demonstrated by experimental data from the DIII-D tokamak. It can also produce a shear in toroidal and poloidal plasma rotation. Possible application of this technique to use the energetic α particles for improvement of burning plasma performance is discussed.

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VL - 45

SP - 30

EP - 39

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 1

ER -

Internal transport barrier driven by redistribution of energetic ions

Abstract

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