<div class="csl-bib-body">
<div class="csl-entry">Radovanovic, L., Dunne, M., Wolfrum, E., Harrer, G., Faitsch, M., Fischer, R., & Aumayr, F. (2022). Developing a physics understanding of the quasi-continuous exhaust regime: pedestal profile and ballooning stability analysis. <i>Nuclear Fusion</i>, <i>62</i>(8), 086004. https://doi.org/10.1088/1741-4326/ac6d6a</div>
</div>
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dc.identifier.issn
0029-5515
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/136848
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dc.description.abstract
It has been experimentally observed that at ASDEX Upgrade (AUG) plasmas at relatively high
shaping, an increase of gas fuelling corresponds to an increase of the frequency and intensity
of the type-I edge localised modes (ELMs). At high enough fuelling, the plasma enters the
quasi continuous exhaust (QCE) regime.We have performed ideal ballooning n"#stability
analysis on four AUG discharges, comparing the type-I ELM dominated phases, with the
phases that are in the QCE regime. The results of this study show that as the gas puff increases,
the plasma gets more ballooning unstable in the pedestal region, especially very close to the
separatrix, at the pedestal bottom. On the contrary, in the middle of the pedestal, the discharges
are more ballooning stable. Here the locally negative magnetic shear has a stabilising effect on
ballooning modes, allowing access to the second stability region. Our analysis of the
ballooning stability and the con!nement factor H98 suggest that with optimisation of the
pedestal shape, good con!nement without type-I ELMs can be achieved. Necessary
ingredients are that the region of the highest pressure gradient is not ideal ballooning limited,
while the pedestal bottom is ballooning unstable. Ideal stability analysis of 36 simulated ITER
pro!les shows that, similarly to the experimental cases from AUG, a high pedestal top
pressure can be maintained concomitant with a ballooning instability at the pedestal bottom,
making QCE a promising scenario.
en
dc.language.iso
en
-
dc.publisher
IOP PUBLISHING LTD
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dc.relation.ispartof
Nuclear Fusion
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dc.subject
Condensed Matter Physics
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dc.subject
Nuclear and High Energy Physics
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dc.subject
magnetic con!nement
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dc.subject
pedestal stability
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dc.subject
QCE regime
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dc.subject
small ELMs
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dc.subject
ballooning modes
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dc.title
Developing a physics understanding of the quasi-continuous exhaust regime: pedestal profile and ballooning stability analysis
en
dc.type
Artikel
de
dc.type
Article
en
dc.contributor.affiliation
Max Planck Institute for Plasma Physics, Germany
-
dc.contributor.affiliation
Max Planck Institute for Plasma Physics, Germany
-
dc.contributor.affiliation
Max Planck Institute for Plasma Physics, Germany
-
dc.contributor.affiliation
Max Planck Institute for Plasma Physics, Germany
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dc.description.startpage
086004
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dc.type.category
Original Research Article
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tuw.container.volume
62
-
tuw.container.issue
8
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tuw.journal.peerreviewed
true
-
tuw.peerreviewed
true
-
wb.publication.intCoWork
International Co-publication
-
tuw.researchTopic.id
M2
-
tuw.researchTopic.name
Materials Characterization
-
tuw.researchTopic.value
100
-
dcterms.isPartOf.title
Nuclear Fusion
-
tuw.publication.orgunit
E134-03 - Forschungsbereich Atomic and Plasma Physics
-
tuw.publisher.doi
10.1088/1741-4326/ac6d6a
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dc.identifier.eissn
1741-4326
-
dc.description.numberOfPages
12
-
tuw.author.orcid
0000-0002-1311-0482
-
tuw.author.orcid
0000-0002-5259-9970
-
tuw.author.orcid
0000-0002-1150-3987
-
tuw.author.orcid
0000-0002-9809-7490
-
tuw.author.orcid
0000-0002-9788-0934
-
wb.sci
true
-
wb.sciencebranch
Physik, Astronomie
-
wb.sciencebranch.oefos
1030
-
wb.facultyfocus
Physikalische Technologie
de
wb.facultyfocus
Physical Technology
en
wb.facultyfocus.faculty
E130
-
item.fulltext
no Fulltext
-
item.openairecristype
http://purl.org/coar/resource_type/c_2df8fbb1
-
item.languageiso639-1
en
-
item.cerifentitytype
Publications
-
item.openairetype
research article
-
item.grantfulltext
restricted
-
crisitem.author.dept
E134-03 - Forschungsbereich Atomic and Plasma Physics
-
crisitem.author.dept
E134 - Institut für Angewandte Physik
-
crisitem.author.dept
E134-03 - Forschungsbereich Atomic and Plasma Physics
-
crisitem.author.dept
Max Planch Institute for Plasma Physics, Garching, Germany
-
crisitem.author.dept
E134-03 - Forschungsbereich Atomic and Plasma Physics