A comparison of H-mode pedestal characteristics in MAST as a function of magnetic configuration and ELM type

A. Kirk; T. O'Gorman; S. Saarelma; R. Scannell; H. R. Wilson

doi:10.1088/0741-3335/51/6/065016

A comparison of H-mode pedestal characteristics in MAST as a function of magnetic configuration and ELM type

A. Kirk, T. O'Gorman, S. Saarelma, R. Scannell, H. R. Wilson

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

56 Scopus citations

Abstract

The H-mode pedestal characteristics on MAST are measured in a variety of connected double null (CDN) and single null divertor (SND) discharges. In CDN discharges the edge density pedestal width in spatial co-ordinates is similar on both the high and the low field sides suggesting that the width may be determined by neutral penetration. However, in SND discharges the density pedestal width appears to be a flux surface quantity, which suggests that the scrape-off-layer may have a role to play in determining the density pedestal width. In both CDN and SND discharges the temperature pedestal width appears to be a flux surface quantity. The pedestal characteristics and edge stability have been studied as a function of the ELM type. The edge temperature pedestal is found to have a weak dependence on , but increases with β_pol as .

Original language	English
Article number	065016
Journal	Plasma Physics and Controlled Fusion
Volume	51
Issue number	6
DOIs	https://doi.org/10.1088/0741-3335/51/6/065016
State	Published - 2009
Externally published	Yes

Funding

Funders	Funder number
Engineering and Physical Sciences Research Council	EP/G003955/1

UN SDGs

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

Access to Document

10.1088/0741-3335/51/6/065016

Cite this

@article{29c14af31849447bbfe65b1181e1c8dc,

title = "A comparison of H-mode pedestal characteristics in MAST as a function of magnetic configuration and ELM type",

abstract = "The H-mode pedestal characteristics on MAST are measured in a variety of connected double null (CDN) and single null divertor (SND) discharges. In CDN discharges the edge density pedestal width in spatial co-ordinates is similar on both the high and the low field sides suggesting that the width may be determined by neutral penetration. However, in SND discharges the density pedestal width appears to be a flux surface quantity, which suggests that the scrape-off-layer may have a role to play in determining the density pedestal width. In both CDN and SND discharges the temperature pedestal width appears to be a flux surface quantity. The pedestal characteristics and edge stability have been studied as a function of the ELM type. The edge temperature pedestal is found to have a weak dependence on , but increases with βpol as .",

author = "A. Kirk and T. O'Gorman and S. Saarelma and R. Scannell and Wilson, {H. R.}",

year = "2009",

doi = "10.1088/0741-3335/51/6/065016",

language = "English",

volume = "51",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "IOP Publishing",

number = "6",

}

TY - JOUR

T1 - A comparison of H-mode pedestal characteristics in MAST as a function of magnetic configuration and ELM type

AU - Kirk, A.

AU - O'Gorman, T.

AU - Saarelma, S.

AU - Scannell, R.

AU - Wilson, H. R.

PY - 2009

Y1 - 2009

N2 - The H-mode pedestal characteristics on MAST are measured in a variety of connected double null (CDN) and single null divertor (SND) discharges. In CDN discharges the edge density pedestal width in spatial co-ordinates is similar on both the high and the low field sides suggesting that the width may be determined by neutral penetration. However, in SND discharges the density pedestal width appears to be a flux surface quantity, which suggests that the scrape-off-layer may have a role to play in determining the density pedestal width. In both CDN and SND discharges the temperature pedestal width appears to be a flux surface quantity. The pedestal characteristics and edge stability have been studied as a function of the ELM type. The edge temperature pedestal is found to have a weak dependence on , but increases with βpol as .

AB - The H-mode pedestal characteristics on MAST are measured in a variety of connected double null (CDN) and single null divertor (SND) discharges. In CDN discharges the edge density pedestal width in spatial co-ordinates is similar on both the high and the low field sides suggesting that the width may be determined by neutral penetration. However, in SND discharges the density pedestal width appears to be a flux surface quantity, which suggests that the scrape-off-layer may have a role to play in determining the density pedestal width. In both CDN and SND discharges the temperature pedestal width appears to be a flux surface quantity. The pedestal characteristics and edge stability have been studied as a function of the ELM type. The edge temperature pedestal is found to have a weak dependence on , but increases with βpol as .

UR - http://www.scopus.com/inward/record.url?scp=67649739561&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/51/6/065016

DO - 10.1088/0741-3335/51/6/065016

M3 - Article

AN - SCOPUS:67649739561

SN - 0741-3335

VL - 51

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 6

M1 - 065016

ER -

A comparison of H-mode pedestal characteristics in MAST as a function of magnetic configuration and ELM type

Abstract

Funding

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this