Overview of ASDEX Upgrade results: Development of integrated operating scenarios for ITER

S. Günter (Corresponding Author), Jari Likonen, et al.

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

Significant progress has been made on ASDEX Upgrade during the last two years in the basic understanding of transport, in the extension of the improved H-mode in parameter space and towards an integrated operating scenario and in the development of control methods for major performance limiting instabilities. The important features were the understanding of particle transport and the control of impurity accumulation based on it, the satisfactory operation with predominantly tungsten-clad walls, the improved H-mode operation over density ranges and for temperature ratios covering (non-simultaneously) the ITER requirements on ν*, n/nGW and Te/Ti, the ELM frequency control by pellet injection and the optimization of NTM suppression by DC-ECCD through variation of the launching angle. From these experiments an integrated scenario has emerged which extrapolates to a 50% improvement in n T τ or a 30% reduction of the required current when compared with the ITER base-line assumptions, with moderately peaked electron and controllable high-Z density profiles.
Original languageEnglish
Pages (from-to)S98 - S108
Number of pages11
JournalNuclear Fusion
Volume45
Issue number10
DOIs
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed

Fingerprint

frequency control
temperature ratio
launching
pellets
tungsten
coverings
direct current
retarding
injection
impurities
requirements
optimization
profiles
electrons

Keywords

  • JET
  • plasma
  • Tokamak
  • fusion energy
  • fusion reactors
  • ITER

Cite this

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title = "Overview of ASDEX Upgrade results: Development of integrated operating scenarios for ITER",
abstract = "Significant progress has been made on ASDEX Upgrade during the last two years in the basic understanding of transport, in the extension of the improved H-mode in parameter space and towards an integrated operating scenario and in the development of control methods for major performance limiting instabilities. The important features were the understanding of particle transport and the control of impurity accumulation based on it, the satisfactory operation with predominantly tungsten-clad walls, the improved H-mode operation over density ranges and for temperature ratios covering (non-simultaneously) the ITER requirements on ν*, n/nGW and Te/Ti, the ELM frequency control by pellet injection and the optimization of NTM suppression by DC-ECCD through variation of the launching angle. From these experiments an integrated scenario has emerged which extrapolates to a 50{\%} improvement in n T τ or a 30{\%} reduction of the required current when compared with the ITER base-line assumptions, with moderately peaked electron and controllable high-Z density profiles.",
keywords = "JET, plasma, Tokamak, fusion energy, fusion reactors, ITER",
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Overview of ASDEX Upgrade results : Development of integrated operating scenarios for ITER. / Günter, S. (Corresponding Author); Likonen, Jari; et al.

In: Nuclear Fusion, Vol. 45, No. 10, 2005, p. S98 - S108.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Overview of ASDEX Upgrade results

T2 - Development of integrated operating scenarios for ITER

AU - Günter, S.

AU - Likonen, Jari

AU - et al., null

PY - 2005

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N2 - Significant progress has been made on ASDEX Upgrade during the last two years in the basic understanding of transport, in the extension of the improved H-mode in parameter space and towards an integrated operating scenario and in the development of control methods for major performance limiting instabilities. The important features were the understanding of particle transport and the control of impurity accumulation based on it, the satisfactory operation with predominantly tungsten-clad walls, the improved H-mode operation over density ranges and for temperature ratios covering (non-simultaneously) the ITER requirements on ν*, n/nGW and Te/Ti, the ELM frequency control by pellet injection and the optimization of NTM suppression by DC-ECCD through variation of the launching angle. From these experiments an integrated scenario has emerged which extrapolates to a 50% improvement in n T τ or a 30% reduction of the required current when compared with the ITER base-line assumptions, with moderately peaked electron and controllable high-Z density profiles.

AB - Significant progress has been made on ASDEX Upgrade during the last two years in the basic understanding of transport, in the extension of the improved H-mode in parameter space and towards an integrated operating scenario and in the development of control methods for major performance limiting instabilities. The important features were the understanding of particle transport and the control of impurity accumulation based on it, the satisfactory operation with predominantly tungsten-clad walls, the improved H-mode operation over density ranges and for temperature ratios covering (non-simultaneously) the ITER requirements on ν*, n/nGW and Te/Ti, the ELM frequency control by pellet injection and the optimization of NTM suppression by DC-ECCD through variation of the launching angle. From these experiments an integrated scenario has emerged which extrapolates to a 50% improvement in n T τ or a 30% reduction of the required current when compared with the ITER base-line assumptions, with moderately peaked electron and controllable high-Z density profiles.

KW - JET

KW - plasma

KW - Tokamak

KW - fusion energy

KW - fusion reactors

KW - ITER

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DO - 10.1088/0029-5515/45/10/S08

M3 - Article

VL - 45

SP - S98 - S108

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

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