Physics of the L-mode to H-mode transition in tokamaks
- General Atomics, San Diego, CA (United States)
- California Univ., Los Angeles, CA (United States)
- California Univ., Berkeley, CA (United States)
- Oak Ridge National Lab., TN (United
Combined theoretical and experimental work has resulted in the creation of a paradigm which has allowed semi-quantitative understanding of the edge confinement improvement that occurs in the H-mode. Shear in the E {times} B flow of the fluctuations in the plasma edge can lead to decorrelation of the fluctuations, decreased radial correlation lengths and reduced turbulent transport. Changes in the radial electric field, the density fluctuations and the edge transport consistent with shear stabilization of turbulence have been seen in several tokamaks. The purpose of this paper is to discuss the most recent data in the light of the basic paradigm of electric field shear stabilization and to critically compare the experimental results with various theories.
- Research Organization:
- General Atomics, San Diego, CA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-89ER51114
- OSTI ID:
- 7170286
- Report Number(s):
- GA-A-20993; CONF-920610-14; ON: DE92040697
- Resource Relation:
- Conference: 14. international conference on plasma and 19th EPS conference on controlled fusion and plasma physics, Innsbruck (Austria), 29 Jun - 3 Jul 1992
- Country of Publication:
- United States
- Language:
- English
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