2014
DOI: 10.1088/0029-5515/54/9/093011
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Investigations on the edge kinetic data in regimes with type-I and mitigated ELMs at ASDEX Upgrade

Abstract: Abstract.The behaviour of proles and gradients of electron density, temperature and pressure at the edge of ASDEX Upgrade was studied in regimes with type-I and small Edge Localized Modes (ELMs) of discharges with and without applied Magnetic Perturbations (MPs). Estimation of the edge kinetic parameters was performed by means of integrated data analysis for joint reconstruction of electron density and temperature proles via combination of data from dierent diagnostics. The MP elds for ELM mitigation were prod… Show more

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Cited by 3 publications
(4 citation statements)
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“…Past this strong initial increase, several short lived peaks are observed. These are in appearance similar to the small ELMs observed during regimes where magnetic perturbation is used [8]. However, this increase of lithium content is short lived, below the 0.…”
Section: Impact Of Lithium In Asdex Upgradesupporting
confidence: 76%
“…Past this strong initial increase, several short lived peaks are observed. These are in appearance similar to the small ELMs observed during regimes where magnetic perturbation is used [8]. However, this increase of lithium content is short lived, below the 0.…”
Section: Impact Of Lithium In Asdex Upgradesupporting
confidence: 76%
“…The appearance of smaller ELMs at larger electron density is not a new observation and recent discussions can be found e.g. in [27,28] for individual discharges. In this section the high number of analysed standard H-mode discharges (>200), allows to illustrate the influence of the density on ELMs with a broader database and a particular focus on the two ELM phases.…”
Section: Deuterium Gas Puffmentioning
confidence: 88%
“…In this section the high number of analysed standard H-mode discharges (>200), allows to illustrate the influence of the density on ELMs with a broader database and a particular focus on the two ELM phases. The transition to the small or mitigated ELM regime, with losses below 1% of the total stored energy, will not be discussed further, as these ELMs are too small for the analysis method used here and the reader is refered to [28,29].…”
Section: Deuterium Gas Puffmentioning
confidence: 99%
“…The use of vertical kicks to trigger ELMs is also being investigated as an option for ELM control to provide tungsten impurity control in the initial phases of ITER operation in which the plasma current for H-mode discharges will typically be ~7.5 MA [6]. The viability of other ELM mitigation techniques such as those based on edge fuelling [7][8][9][10] in current tokamaks needs to be assessed for ITER given the very different behaviour of the recycling neutrals (low core plasma fuelling efficiency) expected in ITER [11]. The extrapolation of all the techniques for active ELM control to ITER is subject to uncertainties, as their physics basis is not known with sufficient precision, and there exist issues regarding their compatibility with particular scenario/hardware requirements in ITER (compatibility with radiative divertor operation, required fuel throughput, etc).…”
Section: Introductionmentioning
confidence: 99%