IEA 59 Workshop

Shape and Aspect Ratio Optimization for a High Beta, Steady-State Tokamak

General Atomics

February 14-15, 2005

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Steady-state operation with high beta and high bootstrap current fraction is required in future tokamak DEMO reactor. Many present tokamaks are addressing such operation for ITER and DEMO. Shape and aspect ratio is particularly important for achieving high beta and also for the optimization of edge stability and edge pedestal performance. Therefore, this workshop will address shape and aspect ratio optimization of high-beta steady-state tokamak including DEMO concept, stability and CD assessment of such operation, and the design of future tokamak devices addressing such experiments. The workshop will focus on tokamaks, including low aspect ratio, but will not address other steady state magnetic configurations.

This workshop is organized under the auspices of the IEA Large Tokamak Agreement. Workshop presentations will also on the IEA Large Tokamak web page.

Monday February 14,

• Introduction T. Taylor
• Concept Development of Compact DEMO Reactor K. Tobita
• Optimization of a Steady-State Tokamak-Based Power Plant F. Najmabadi
• Optimization of a High-b Steady-State Tokamak Burning Plasma Experiment Based on a High-b Steady-State Tokamak Power Plant D. Meade
• Mission and Design Requirements on National Centralized Tokamak (NCT) Y. Miura
• MAST Spherical Tokamak Developments : towards High-Beta, Steady-State Tokamak operation A. Field
• Optimized Beta Limits in DIII-D Advanced Tokamak Discharges: Global & Edge J. Ferron
• Advanced Tokamak regimes at JET : what are the changes when operating at high triangularity F. Rimini
• Stability calculations on NCT G. Kurita
• Ideal MHD Stability Scaling with Aspect Ratio, Shaping, and q J. Menard
• Transport and Stability Implications for Shape and Aspect Ratio of Steady-State High-Performance Tokamaks C. Petty
• Scientific Rationale for the Power Upgrade on JET : towards Steady-State Operation at High Bootstrap X. Litaudon
• High bp experiments on JET and access to type II ELMs G. Saibene

Tuesday February 15

• Design study of NCT and its shape and aspect ratio controllability M. Matsukawa
• Aspect Ratio Considerations for Active RWM Control S. Sabbagh
• Current profile control for high performance steady state tokamaks: Considerations from C-Mod LHCD program A. Hubbard
• Plasma shape, profile and flux control for high-bootstrap steady-state tokamaks D. Moreau
• Discussion --- Design considerations for next step and demo D. Meade
  • Aspect Ratio Optimization of Burning Plasma Tokamaks- P. Barabaschi
• Discussion ---Stability, Transport, and Control (suggestion)

• ARIES-AT: An Advanced Tokamak, Advanced Technology Fusion Power Plant F. Najmabadi Erice 2004
• Physics in ARIES Tokamak Power Plant Design C.Kessel, Erice 2004
• Plasma Profile and Shape Optimization for the Advanced Tokamak Power Plant, ARIES-AT. C. Kessel, C. Mau, S Jardin and F.Najmabadi
• Systems Analysis of a Compact Next Step Burning Plasma Experiment S. Jardin, C. Kessel et al Fusion Science and Technology 43, 161 2003
• ITER-FEAT Performance and Optimization July 2001, (1.2 MB, pdf)
• JT60-SC 2001 (3.4 MB, pdf)
• A High-Aspect-Ratio Design for ITER J. C. Wesley and the US ITEr Home Team Fusion Tech. 21, 1380 1992 (1 MB, pdf),
• Y. Seki et al., (1991). Rep. JAERI-M 91-081, JAERI. Naka.
• TPX Design 1993, (3.5 MB, pdf)
• Physics Optimization of the Compact Ignition Tokamak (CIT) W. Reiersen et al 1991(0.4 MB, pdf),
• J. Galumbos et al Fusion Tech. 13, 93, 1988