High recycling outer divertor regimes after type-I ELMs at high density in ASDEX Upgrade

M. Wischmeier; A. Kallenbach; A. V. Chankin; D. P. Coster; T. Eich; A. Herrmann; H. W. Müller

doi:10.1016/j.jnucmat.2007.01.041

High recycling outer divertor regimes after type-I ELMs at high density in ASDEX Upgrade

M. Wischmeier (Corresponding author), A. Kallenbach, A. V. Chankin, D. P. Coster, T. Eich, A. Herrmann, H. W. Müller

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

Experiments have been conducted in SNL type-I ELMy H-mode on ASDEX Upgrade. Depending on the upstream conditions in the Scrape-off-layer and core plasma, different temporal evolutions of the plasma regime in the outer divertor are identified during the recovery period following an ELM. The divertor plasma is characterized using experimental measurements such as line radiation (D_α, CIII), spatially resolved thermography (IR) and fixed Langmuir probes (LP). Whilst in one case a first clear temporal peak in line radiation (D_α, CIII) as well as power (IR) and particle fluxes (LP) onto the outer divertor plate is followed by a quiescent inter-ELM phase, in the other case this initial peak is followed by a broader temporal peak in all but the IR and CIII signals. A possible explanation based on simple analytic considerations is presented.

Original language	English
Pages (from-to)	448-452
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	363-365
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2007.01.041
Publication status	Published - 15 Jun 2007
Externally published	Yes

Austrian Fields of Science 2012

103022 Plasma physics

Keywords

ASDEX-Upgrade
Divertor
Edge modelling
ELM
P0600

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10.1016/j.jnucmat.2007.01.041

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title = "High recycling outer divertor regimes after type-I ELMs at high density in ASDEX Upgrade",

abstract = "Experiments have been conducted in SNL type-I ELMy H-mode on ASDEX Upgrade. Depending on the upstream conditions in the Scrape-off-layer and core plasma, different temporal evolutions of the plasma regime in the outer divertor are identified during the recovery period following an ELM. The divertor plasma is characterized using experimental measurements such as line radiation (Dα, CIII), spatially resolved thermography (IR) and fixed Langmuir probes (LP). Whilst in one case a first clear temporal peak in line radiation (Dα, CIII) as well as power (IR) and particle fluxes (LP) onto the outer divertor plate is followed by a quiescent inter-ELM phase, in the other case this initial peak is followed by a broader temporal peak in all but the IR and CIII signals. A possible explanation based on simple analytic considerations is presented.",

keywords = "ASDEX-Upgrade, Divertor, Edge modelling, ELM, P0600",

author = "M. Wischmeier and A. Kallenbach and Chankin, \{A. V.\} and Coster, \{D. P.\} and T. Eich and A. Herrmann and M{\"u}ller, \{H. W.\}",

year = "2007",

month = jun,

day = "15",

doi = "10.1016/j.jnucmat.2007.01.041",

language = "English",

volume = "363-365",

pages = "448--452",

journal = "Journal of Nuclear Materials",

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T1 - High recycling outer divertor regimes after type-I ELMs at high density in ASDEX Upgrade

AU - Wischmeier, M.

AU - Kallenbach, A.

AU - Chankin, A. V.

AU - Coster, D. P.

AU - Eich, T.

AU - Herrmann, A.

AU - Müller, H. W.

PY - 2007/6/15

Y1 - 2007/6/15

N2 - Experiments have been conducted in SNL type-I ELMy H-mode on ASDEX Upgrade. Depending on the upstream conditions in the Scrape-off-layer and core plasma, different temporal evolutions of the plasma regime in the outer divertor are identified during the recovery period following an ELM. The divertor plasma is characterized using experimental measurements such as line radiation (Dα, CIII), spatially resolved thermography (IR) and fixed Langmuir probes (LP). Whilst in one case a first clear temporal peak in line radiation (Dα, CIII) as well as power (IR) and particle fluxes (LP) onto the outer divertor plate is followed by a quiescent inter-ELM phase, in the other case this initial peak is followed by a broader temporal peak in all but the IR and CIII signals. A possible explanation based on simple analytic considerations is presented.

AB - Experiments have been conducted in SNL type-I ELMy H-mode on ASDEX Upgrade. Depending on the upstream conditions in the Scrape-off-layer and core plasma, different temporal evolutions of the plasma regime in the outer divertor are identified during the recovery period following an ELM. The divertor plasma is characterized using experimental measurements such as line radiation (Dα, CIII), spatially resolved thermography (IR) and fixed Langmuir probes (LP). Whilst in one case a first clear temporal peak in line radiation (Dα, CIII) as well as power (IR) and particle fluxes (LP) onto the outer divertor plate is followed by a quiescent inter-ELM phase, in the other case this initial peak is followed by a broader temporal peak in all but the IR and CIII signals. A possible explanation based on simple analytic considerations is presented.

KW - ASDEX-Upgrade

KW - Divertor

KW - Edge modelling

KW - ELM

KW - P0600

UR - https://www.scopus.com/pages/publications/34248531640

U2 - 10.1016/j.jnucmat.2007.01.041

DO - 10.1016/j.jnucmat.2007.01.041

M3 - Article

AN - SCOPUS:34248531640

SN - 0022-3115

VL - 363-365

SP - 448

EP - 452

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1-3

ER -

High recycling outer divertor regimes after type-I ELMs at high density in ASDEX Upgrade

Abstract

Austrian Fields of Science 2012

Keywords

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