Implications of TAE modes for the design of ITER

Technical Report · Mon May 20 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/5792112· OSTI ID:5792112

Fowler, T K ^[1]; Finkenthal, D ^[2]

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1. Lawrence Livermore National Lab., CA (USA)
2. California Univ., Berkeley, CA (USA)

A simple mixing-length estimate of diffusion of alphas particles by toroidicity-induced shear Alfven eigenmodes (TAE) is used, in zero and one-dimensional models, to evaluate the importance of diffusion of meeting ignition requirements for ITER and other next-generation burning plasma experiments. It is found that, depending on a number of assumptions, diffusion could reduce that effectiveness of alpha heating in the core as much as an order of magnitude. However, the effect would be less if only alphas resonant with the Alfven waves diffuse. Also, in the Appendix it is argued that the mixing length diffusion formula, though qualitatively reasonable, may be an over estimate. 12 refs., 7 figs., 1 tab.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5792112
• Report Number(s): UCRL-ID-107222; ON: DE91013128
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALPHA PARTICLES
DIFFUSION
ITER TOKAMAK
PLASMA HEATING
ALFVEN WAVES
DESIGN
SHEAR
THERMONUCLEAR IGNITION
CHARGED PARTICLES
CLOSED PLASMA DEVICES
HEATING
HYDROMAGNETIC WAVES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700103* - Fusion Energy- Plasma Research- Kinetics
700101 - Fusion Energy- Plasma Research- Confinement
Heating
& Production