The influence of MHD instabilities on the COMPASS-D H-mode threshold

S. J. Fielding; A. R. Field; M. Valovic; H. R. Wilson; P. G. Carolan; J. W. Connor; N. J. Conway; J. Dowling; B. Lloyd; A. W. Morris

doi:10.1088/0741-3335/42/5A/321

The influence of MHD instabilities on the COMPASS-D H-mode threshold

S. J. Fielding, A. R. Field, M. Valovic, H. R. Wilson, P. G. Carolan, J. W. Connor, N. J. Conway, J. Dowling, B. Lloyd, A. W. Morris

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

4 Scopus citations

Abstract

Significant improvements have been made to edge diagnostics on COMPASS-D enabling detailed studies of the H-mode dynamics. New experiments have been carried out with current ramps in high-power ECR discharges to test the influence of the peeling mode on the low-density H-mode transition. Observations and analysis suggest that the peeling mode is not the controlling mechanism. Density-ramp experiments indicate that the edge electron pressure gradient is correlated with transition behaviour and links are made with global observations.

Original language	English
Pages (from-to)	A191-A197
Journal	Plasma Physics and Controlled Fusion
Volume	42
Issue number	SUPPL. 5A
DOIs	https://doi.org/10.1088/0741-3335/42/5A/321
State	Published - 2000
Externally published	Yes

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title = "The influence of MHD instabilities on the COMPASS-D H-mode threshold",

abstract = "Significant improvements have been made to edge diagnostics on COMPASS-D enabling detailed studies of the H-mode dynamics. New experiments have been carried out with current ramps in high-power ECR discharges to test the influence of the peeling mode on the low-density H-mode transition. Observations and analysis suggest that the peeling mode is not the controlling mechanism. Density-ramp experiments indicate that the edge electron pressure gradient is correlated with transition behaviour and links are made with global observations.",

author = "Fielding, \{S. J.\} and Field, \{A. R.\} and M. Valovic and Wilson, \{H. R.\} and Carolan, \{P. G.\} and Connor, \{J. W.\} and Conway, \{N. J.\} and J. Dowling and B. Lloyd and Morris, \{A. W.\}",

year = "2000",

doi = "10.1088/0741-3335/42/5A/321",

language = "English",

volume = "42",

pages = "A191--A197",

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T1 - The influence of MHD instabilities on the COMPASS-D H-mode threshold

AU - Fielding, S. J.

AU - Field, A. R.

AU - Valovic, M.

AU - Wilson, H. R.

AU - Carolan, P. G.

AU - Connor, J. W.

AU - Conway, N. J.

AU - Dowling, J.

AU - Lloyd, B.

AU - Morris, A. W.

PY - 2000

Y1 - 2000

N2 - Significant improvements have been made to edge diagnostics on COMPASS-D enabling detailed studies of the H-mode dynamics. New experiments have been carried out with current ramps in high-power ECR discharges to test the influence of the peeling mode on the low-density H-mode transition. Observations and analysis suggest that the peeling mode is not the controlling mechanism. Density-ramp experiments indicate that the edge electron pressure gradient is correlated with transition behaviour and links are made with global observations.

AB - Significant improvements have been made to edge diagnostics on COMPASS-D enabling detailed studies of the H-mode dynamics. New experiments have been carried out with current ramps in high-power ECR discharges to test the influence of the peeling mode on the low-density H-mode transition. Observations and analysis suggest that the peeling mode is not the controlling mechanism. Density-ramp experiments indicate that the edge electron pressure gradient is correlated with transition behaviour and links are made with global observations.

UR - https://www.scopus.com/pages/publications/4244098027

U2 - 10.1088/0741-3335/42/5A/321

DO - 10.1088/0741-3335/42/5A/321

M3 - Article

AN - SCOPUS:4244098027

SN - 0741-3335

VL - 42

SP - A191-A197

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - SUPPL. 5A

ER -

The influence of MHD instabilities on the COMPASS-D H-mode threshold

Abstract

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