Published December 1999
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Dynamics of zonal flows and self-regulating drift-wave turbulence
- 1. University of California, San Diego, La Jolla, CA (United States)
- 2. ITER, San Diego Joint Work Site, La Jolla, CA (United States)
- 3. General Atomics, San Diego, CA (United States)
- 4. Max Planck Institute for Nuclear Physics, Heidelberg (Germany)
- 5. University of Saskatchewan, Saskatchewan (Canada)
Description
We present a theory of zonal flow - drift wave dynamics. Zonal flows are generated by modulational instability of a drift wave spectrum, and are damped by collisions. Drift waves undergo random shearing-induced refraction, resulting in increased mean square radial wavenumber. Drift waves and zonal flows together form a simple dynamical system, which has a single stable fixed point. In this state, the fluctuation intensity and turbulent diffusivity are ultimately proportional to the collisional zonal flow damping. The implications of these results for transport models is discussed. (author)
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Additional details
Publishing Information
- Imprint Title
- Fusion energy 1998. Proceedings. V. 1-4
- Imprint Pagination
- 1721 p.
- Journal Issue
- no. 1/P
- Series
- C and S papers series
- Journal Page Range
- v. 4 p. 1421-1428
- ISSN
- 1563-0153
- Report number
- IAEA-CSP--1/P
Conference
- Title
- 17. IAEA fusion energy conference
- Dates
- 18-24 Oct 1998
- Place
- Yokohama (Japan)
INIS
- Country of Publication
- International Atomic Energy Agency (IAEA)
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 31011489
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- COMPUTERIZED SIMULATION; MAGNETIC CONFINEMENT; MAGNETIC FIELDS; MEETINGS; NEOCLASSICAL TRANSPORT THEORY; PLASMA CONFINEMENT; PLASMA SIMULATION; ROTATIONAL TRANSFORM; TOKAMAK DEVICES; TOROIDAL CONFIGURATION
- Descriptors DEC
- ANNULAR SPACE; CHARGED-PARTICLE TRANSPORT THEORY; CLOSED CONFIGURATIONS; CLOSED PLASMA DEVICES; CONFIGURATION; CONFINEMENT; MAGNETIC FIELD CONFIGURATIONS; PLASMA CONFINEMENT; SIMULATION; SPACE; THERMONUCLEAR DEVICES; TRANSPORT THEORY
Optional Information
- Contract/Grant/Project number
- Grant FG03-88ER53275
- Notes
- 14 refs
- Secondary number(s)
- TH--3/1