Studies of a parallel force balance breaking instability in a stellarator

Q. R. Marksteiner; T. Sunn Pedersen; J. W. Berkery; M. S. Hahn; J. M. Mendez; B. De Durand Gevigney; P. Ennever; D. Boyle; M. Shulman; H. Himura

doi:10.1063/1.3122293

Studies of a parallel force balance breaking instability in a stellarator

Q. R. Marksteiner
, T. Sunn Pedersen
, J. W. Berkery
, M. S. Hahn
, J. M. Mendez
, B. De Durand Gevigney
, P. Ennever
, D. Boyle
, M. Shulman
, H. Himura

PPPL Tokamak Expermntl Science

Research output: Contribution to journal › Conference article › peer-review

Abstract

An instability has been observed in non-neutral plasmas confined on magnetic surfaces in the presence of a finite ion fraction [Phys. Rev. Letters 100, 065002 (2008)]. The dependence of the frequency and amplitude of the instability on neutral pressure, magnetic field strength, and ion species show that the mode consists of interacting perturbations of ions and electrons. In the Columbia Non-neutral Torus (CNT) the instability has a poloidal mode number of m=l. This does not correspond to a rational surface, implying that the parallel force balance of the electron fluid is broken. Here the diagnostic methods used to study this instability are described in detail, and some key results are shown.

Original language	English (US)
Pages (from-to)	63-68
Number of pages	6
Journal	AIP Conference Proceedings
Volume	1114
DOIs	https://doi.org/10.1063/1.3122293
State	Published - 2009
Event	9th International Workshop on Non-Neutral Plasma Physics - New York, NY, United States Duration: Jun 16 2008 → Jun 20 2008

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

Keywords

Instability
Magnetic surfaces
Non-neutral plasmas
Pure-electron plasmas
Stellarator
Trapped particles

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10.1063/1.3122293

Cite this

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title = "Studies of a parallel force balance breaking instability in a stellarator",

abstract = "An instability has been observed in non-neutral plasmas confined on magnetic surfaces in the presence of a finite ion fraction [Phys. Rev. Letters 100, 065002 (2008)]. The dependence of the frequency and amplitude of the instability on neutral pressure, magnetic field strength, and ion species show that the mode consists of interacting perturbations of ions and electrons. In the Columbia Non-neutral Torus (CNT) the instability has a poloidal mode number of m=l. This does not correspond to a rational surface, implying that the parallel force balance of the electron fluid is broken. Here the diagnostic methods used to study this instability are described in detail, and some key results are shown.",

keywords = "Instability, Magnetic surfaces, Non-neutral plasmas, Pure-electron plasmas, Stellarator, Trapped particles",

author = "Marksteiner, \{Q. R.\} and Pedersen, \{T. Sunn\} and Berkery, \{J. W.\} and Hahn, \{M. S.\} and Mendez, \{J. M.\} and \{De Durand Gevigney\}, B. and P. Ennever and D. Boyle and M. Shulman and H. Himura",

year = "2009",

doi = "10.1063/1.3122293",

language = "English (US)",

volume = "1114",

pages = "63--68",

journal = "AIP Conference Proceedings",

issn = "0094-243X",

publisher = "American Institute of Physics",

note = "9th International Workshop on Non-Neutral Plasma Physics ; Conference date: 16-06-2008 Through 20-06-2008",

}

TY - JOUR

T1 - Studies of a parallel force balance breaking instability in a stellarator

AU - Marksteiner, Q. R.

AU - Pedersen, T. Sunn

AU - Berkery, J. W.

AU - Hahn, M. S.

AU - Mendez, J. M.

AU - De Durand Gevigney, B.

AU - Ennever, P.

AU - Boyle, D.

AU - Shulman, M.

AU - Himura, H.

PY - 2009

Y1 - 2009

N2 - An instability has been observed in non-neutral plasmas confined on magnetic surfaces in the presence of a finite ion fraction [Phys. Rev. Letters 100, 065002 (2008)]. The dependence of the frequency and amplitude of the instability on neutral pressure, magnetic field strength, and ion species show that the mode consists of interacting perturbations of ions and electrons. In the Columbia Non-neutral Torus (CNT) the instability has a poloidal mode number of m=l. This does not correspond to a rational surface, implying that the parallel force balance of the electron fluid is broken. Here the diagnostic methods used to study this instability are described in detail, and some key results are shown.

AB - An instability has been observed in non-neutral plasmas confined on magnetic surfaces in the presence of a finite ion fraction [Phys. Rev. Letters 100, 065002 (2008)]. The dependence of the frequency and amplitude of the instability on neutral pressure, magnetic field strength, and ion species show that the mode consists of interacting perturbations of ions and electrons. In the Columbia Non-neutral Torus (CNT) the instability has a poloidal mode number of m=l. This does not correspond to a rational surface, implying that the parallel force balance of the electron fluid is broken. Here the diagnostic methods used to study this instability are described in detail, and some key results are shown.

KW - Instability

KW - Magnetic surfaces

KW - Non-neutral plasmas

KW - Pure-electron plasmas

KW - Stellarator

KW - Trapped particles

UR - https://www.scopus.com/pages/publications/65349115399

UR - https://www.scopus.com/pages/publications/65349115399#tab=citedBy

U2 - 10.1063/1.3122293

DO - 10.1063/1.3122293

M3 - Conference article

AN - SCOPUS:65349115399

SN - 0094-243X

VL - 1114

SP - 63

EP - 68

JO - AIP Conference Proceedings

JF - AIP Conference Proceedings

T2 - 9th International Workshop on Non-Neutral Plasma Physics

Y2 - 16 June 2008 through 20 June 2008

ER -

Studies of a parallel force balance breaking instability in a stellarator

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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