Observation of hot electron ring instabilities in ELMO Bumpy Torus

S. Hiroe; J. B. Wilgen; F. W. Baity; L. A. Berry; R. J. Colchin; W. A. Davis; A. M. El Nadi; G. R. Haste; D. L. Hillis; D. A. Spong; T. Uckan; T. L. Owens

doi:10.1063/1.864700

Observation of hot electron ring instabilities in ELMO Bumpy Torus

S. Hiroe, J. B. Wilgen, F. W. Baity, L. A. Berry, R. J. Colchin, W. A. Davis, A. M. El Nadi, G. R. Haste, D. L. Hillis, D. A. Spong, T. Uckan, T. L. Owens

Plasma Theory and Modeling

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

13 Scopus citations

Abstract

A high-frequency hot electron instability is observed in ELMO Bumpy Torus (EBT) plasmas when the hot electron-to-ion density ratio exceeds 0.4. Both the real frequency and the imaginary frequency are larger than the ion cyclotron frequency. The azimuthal mode number (m) is 7, and the instability rotates in the hot electron curvature drift direction. This instability is identified as a curvature-driven mode. When it is strongly excited, the equilibrium of the hot electron annuli and confined plasmas are destroyed (disruption). Ion heating and neutron bursts are associated with this instability.

Original language	English
Pages (from-to)	1019-1029
Number of pages	11
Journal	Physics of Fluids
Volume	27
Issue number	4
DOIs	https://doi.org/10.1063/1.864700
State	Published - 1984

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@article{043cab3b3449441e81a9eb29651342c5,

title = "Observation of hot electron ring instabilities in ELMO Bumpy Torus",

abstract = "A high-frequency hot electron instability is observed in ELMO Bumpy Torus (EBT) plasmas when the hot electron-to-ion density ratio exceeds 0.4. Both the real frequency and the imaginary frequency are larger than the ion cyclotron frequency. The azimuthal mode number (m) is 7, and the instability rotates in the hot electron curvature drift direction. This instability is identified as a curvature-driven mode. When it is strongly excited, the equilibrium of the hot electron annuli and confined plasmas are destroyed (disruption). Ion heating and neutron bursts are associated with this instability.",

author = "S. Hiroe and Wilgen, {J. B.} and Baity, {F. W.} and Berry, {L. A.} and Colchin, {R. J.} and Davis, {W. A.} and {El Nadi}, {A. M.} and Haste, {G. R.} and Hillis, {D. L.} and Spong, {D. A.} and T. Uckan and Owens, {T. L.}",

year = "1984",

doi = "10.1063/1.864700",

language = "English",

volume = "27",

pages = "1019--1029",

journal = "Physics of Fluids",

issn = "1070-6631",

publisher = "American Institute of Physics",

number = "4",

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TY - JOUR

T1 - Observation of hot electron ring instabilities in ELMO Bumpy Torus

AU - Hiroe, S.

AU - Wilgen, J. B.

AU - Baity, F. W.

AU - Berry, L. A.

AU - Colchin, R. J.

AU - Davis, W. A.

AU - El Nadi, A. M.

AU - Haste, G. R.

AU - Hillis, D. L.

AU - Spong, D. A.

AU - Uckan, T.

AU - Owens, T. L.

PY - 1984

Y1 - 1984

N2 - A high-frequency hot electron instability is observed in ELMO Bumpy Torus (EBT) plasmas when the hot electron-to-ion density ratio exceeds 0.4. Both the real frequency and the imaginary frequency are larger than the ion cyclotron frequency. The azimuthal mode number (m) is 7, and the instability rotates in the hot electron curvature drift direction. This instability is identified as a curvature-driven mode. When it is strongly excited, the equilibrium of the hot electron annuli and confined plasmas are destroyed (disruption). Ion heating and neutron bursts are associated with this instability.

AB - A high-frequency hot electron instability is observed in ELMO Bumpy Torus (EBT) plasmas when the hot electron-to-ion density ratio exceeds 0.4. Both the real frequency and the imaginary frequency are larger than the ion cyclotron frequency. The azimuthal mode number (m) is 7, and the instability rotates in the hot electron curvature drift direction. This instability is identified as a curvature-driven mode. When it is strongly excited, the equilibrium of the hot electron annuli and confined plasmas are destroyed (disruption). Ion heating and neutron bursts are associated with this instability.

UR - http://www.scopus.com/inward/record.url?scp=0021406664&partnerID=8YFLogxK

U2 - 10.1063/1.864700

DO - 10.1063/1.864700

M3 - Article

AN - SCOPUS:0021406664

SN - 1070-6631

VL - 27

SP - 1019

EP - 1029

JO - Physics of Fluids

JF - Physics of Fluids

IS - 4

ER -

Observation of hot electron ring instabilities in ELMO Bumpy Torus

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