The combined effect of EPMs and TAEs on energetic ion confinement and sawtooth stabilization

S. Bernabei; R. V. Budny; E. D. Fredrickson; N. N. Gorelenkov; J. C. Hosea; C. K. Phillips; R. B. White; J. R. Wilson; C. C. Petty; R. I. Pinsker; R. W. Harvey; A. P. Smirnov

doi:10.1088/0029-5515/41/5/304

The combined effect of EPMs and TAEs on energetic ion confinement and sawtooth stabilization

S. Bernabei
, R. V. Budny
, E. D. Fredrickson
, N. N. Gorelenkov
, J. C. Hosea
, C. K. Phillips
, R. B. White
, J. R. Wilson
, C. C. Petty
, R. I. Pinsker
, R. W. Harvey
, A. P. Smirnov

PPPL Theory

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

27 Scopus citations

Abstract

It is shown for the first time that the chirping Alfvén instabilities observed mostly during ICRF heating have been positively identified as energetic particle modes (EPMs). This has been possible because of a detailed measurement of the q profile with the MSE diagnostic in DIII-D. The EPMs are shown to be the leading cause of the monster sawtooth crash. It is also shown that toroidal Alfén eigenmodes are excited either directly or indirectly by the EPMs and that they cause fast ion losses. A scenario for the stabilization and the crash of the monster sawteeth and for the degradation of the ICRF heating efficiency at high power is presented.

Original language	English (US)
Pages (from-to)	513-518
Number of pages	6
Journal	Nuclear Fusion
Volume	41
Issue number	5
DOIs	https://doi.org/10.1088/0029-5515/41/5/304
State	Published - May 2001

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/0029-5515/41/5/304

Cite this

@article{8647e3aa9c48471881f196f7d2e4a1fc,

title = "The combined effect of EPMs and TAEs on energetic ion confinement and sawtooth stabilization",

abstract = "It is shown for the first time that the chirping Alfv{\'e}n instabilities observed mostly during ICRF heating have been positively identified as energetic particle modes (EPMs). This has been possible because of a detailed measurement of the q profile with the MSE diagnostic in DIII-D. The EPMs are shown to be the leading cause of the monster sawtooth crash. It is also shown that toroidal Alf{\'e}n eigenmodes are excited either directly or indirectly by the EPMs and that they cause fast ion losses. A scenario for the stabilization and the crash of the monster sawteeth and for the degradation of the ICRF heating efficiency at high power is presented.",

author = "S. Bernabei and Budny, \{R. V.\} and Fredrickson, \{E. D.\} and Gorelenkov, \{N. N.\} and Hosea, \{J. C.\} and Phillips, \{C. K.\} and White, \{R. B.\} and Wilson, \{J. R.\} and Petty, \{C. C.\} and Pinsker, \{R. I.\} and Harvey, \{R. W.\} and Smirnov, \{A. P.\}",

year = "2001",

month = may,

doi = "10.1088/0029-5515/41/5/304",

language = "English (US)",

volume = "41",

pages = "513--518",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "5",

}

TY - JOUR

T1 - The combined effect of EPMs and TAEs on energetic ion confinement and sawtooth stabilization

AU - Bernabei, S.

AU - Budny, R. V.

AU - Fredrickson, E. D.

AU - Gorelenkov, N. N.

AU - Hosea, J. C.

AU - Phillips, C. K.

AU - White, R. B.

AU - Wilson, J. R.

AU - Petty, C. C.

AU - Pinsker, R. I.

AU - Harvey, R. W.

AU - Smirnov, A. P.

PY - 2001/5

Y1 - 2001/5

N2 - It is shown for the first time that the chirping Alfvén instabilities observed mostly during ICRF heating have been positively identified as energetic particle modes (EPMs). This has been possible because of a detailed measurement of the q profile with the MSE diagnostic in DIII-D. The EPMs are shown to be the leading cause of the monster sawtooth crash. It is also shown that toroidal Alfén eigenmodes are excited either directly or indirectly by the EPMs and that they cause fast ion losses. A scenario for the stabilization and the crash of the monster sawteeth and for the degradation of the ICRF heating efficiency at high power is presented.

AB - It is shown for the first time that the chirping Alfvén instabilities observed mostly during ICRF heating have been positively identified as energetic particle modes (EPMs). This has been possible because of a detailed measurement of the q profile with the MSE diagnostic in DIII-D. The EPMs are shown to be the leading cause of the monster sawtooth crash. It is also shown that toroidal Alfén eigenmodes are excited either directly or indirectly by the EPMs and that they cause fast ion losses. A scenario for the stabilization and the crash of the monster sawteeth and for the degradation of the ICRF heating efficiency at high power is presented.

UR - https://www.scopus.com/pages/publications/0035353510

UR - https://www.scopus.com/pages/publications/0035353510#tab=citedBy

U2 - 10.1088/0029-5515/41/5/304

DO - 10.1088/0029-5515/41/5/304

M3 - Article

AN - SCOPUS:0035353510

SN - 0029-5515

VL - 41

SP - 513

EP - 518

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 5

ER -

The combined effect of EPMs and TAEs on energetic ion confinement and sawtooth stabilization

Abstract

All Science Journal Classification (ASJC) codes

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