ELM-related fluctuations in PBX-M H-modes

S. M. Kaye; J. L. Dunlap; T. S. Hahm; S. Sesnic; W. Tang; J. H. Harris; P. Roney; W. Davis

doi:10.1088/0741-3335/36/7A/017

ELM-related fluctuations in PBX-M H-modes

S. M. Kaye, J. L. Dunlap, T. S. Hahm, S. Sesnic, W. Tang, J. H. Harris, P. Roney, W. Davis

Power Exhaust and Particle Control

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

9 Scopus citations

Abstract

Edge Localized Modes have been studied in PBX-M discharges with high data sampling rate magnetic diagnostics with good spatial coverage. High frequency (>or=250 kHz) activity appears prior to the increase in the D_alpha emission. While this high frequency activity is global, with high coherence for all coils both on the inside and outside midplane, there is no identifiable mode structure. A very intense outward ballooning feature appears simultaneously with the increase in the D_alpha emission, and lasts for about 5 msec. The toroidal mode structure of this feature is clearly identifiable, consisting of a series of toroidal harmonics from n=3 to 8, at frequencies given by f_n=f₀+n Delta f, where Delta f=20-30 kHz and f ₀=30-50 kHz. This feature may be caused by the kinetic ballooning mode.

Original language	English
Article number	017
Pages (from-to)	A135-A140
Journal	Plasma Physics and Controlled Fusion
Volume	36
Issue number	7 A
DOIs	https://doi.org/10.1088/0741-3335/36/7A/017
State	Published - 1994

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1088/0741-3335/36/7A/017

Cite this

@article{dbb1de5586f54470aefd6517675a61cc,

title = "ELM-related fluctuations in PBX-M H-modes",

abstract = "Edge Localized Modes have been studied in PBX-M discharges with high data sampling rate magnetic diagnostics with good spatial coverage. High frequency (>or=250 kHz) activity appears prior to the increase in the Dalpha emission. While this high frequency activity is global, with high coherence for all coils both on the inside and outside midplane, there is no identifiable mode structure. A very intense outward ballooning feature appears simultaneously with the increase in the Dalpha emission, and lasts for about 5 msec. The toroidal mode structure of this feature is clearly identifiable, consisting of a series of toroidal harmonics from n=3 to 8, at frequencies given by fn=f0+n Delta f, where Delta f=20-30 kHz and f 0=30-50 kHz. This feature may be caused by the kinetic ballooning mode.",

author = "Kaye, {S. M.} and Dunlap, {J. L.} and Hahm, {T. S.} and S. Sesnic and W. Tang and Harris, {J. H.} and P. Roney and W. Davis",

year = "1994",

doi = "10.1088/0741-3335/36/7A/017",

language = "English",

volume = "36",

pages = "A135--A140",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "IOP Publishing",

number = "7 A",

}

TY - JOUR

T1 - ELM-related fluctuations in PBX-M H-modes

AU - Kaye, S. M.

AU - Dunlap, J. L.

AU - Hahm, T. S.

AU - Sesnic, S.

AU - Tang, W.

AU - Harris, J. H.

AU - Roney, P.

AU - Davis, W.

PY - 1994

Y1 - 1994

N2 - Edge Localized Modes have been studied in PBX-M discharges with high data sampling rate magnetic diagnostics with good spatial coverage. High frequency (>or=250 kHz) activity appears prior to the increase in the Dalpha emission. While this high frequency activity is global, with high coherence for all coils both on the inside and outside midplane, there is no identifiable mode structure. A very intense outward ballooning feature appears simultaneously with the increase in the Dalpha emission, and lasts for about 5 msec. The toroidal mode structure of this feature is clearly identifiable, consisting of a series of toroidal harmonics from n=3 to 8, at frequencies given by fn=f0+n Delta f, where Delta f=20-30 kHz and f 0=30-50 kHz. This feature may be caused by the kinetic ballooning mode.

AB - Edge Localized Modes have been studied in PBX-M discharges with high data sampling rate magnetic diagnostics with good spatial coverage. High frequency (>or=250 kHz) activity appears prior to the increase in the Dalpha emission. While this high frequency activity is global, with high coherence for all coils both on the inside and outside midplane, there is no identifiable mode structure. A very intense outward ballooning feature appears simultaneously with the increase in the Dalpha emission, and lasts for about 5 msec. The toroidal mode structure of this feature is clearly identifiable, consisting of a series of toroidal harmonics from n=3 to 8, at frequencies given by fn=f0+n Delta f, where Delta f=20-30 kHz and f 0=30-50 kHz. This feature may be caused by the kinetic ballooning mode.

UR - http://www.scopus.com/inward/record.url?scp=0028464817&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/36/7A/017

DO - 10.1088/0741-3335/36/7A/017

M3 - Article

AN - SCOPUS:0028464817

SN - 0741-3335

VL - 36

SP - A135-A140

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 7 A

M1 - 017

ER -

ELM-related fluctuations in PBX-M H-modes

Abstract

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this