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Nazikian R, Shinohara K, Kramer GJ, et al. Measurement of turbulence decorrelation during transport barrier evolution in a high-temperature fusion plasma. Phys Rev Lett. 2005;94(13):135002doi: 10.1103/PhysRevLett.94.135002.
Nazikian, R., Shinohara, K., Kramer, G. J., Valeo, E., Hill, K., Hahm, T. S., Rewoldt, G., Ide, S., Koide, Y., Oyama, Y., Shirai, H., & Tang, W. (2005). Measurement of turbulence decorrelation during transport barrier evolution in a high-temperature fusion plasma. Physical review letters, 94(13), 135002. https://doi.org/10.1103/PhysRevLett.94.135002
Nazikian, R, et al. "Measurement of turbulence decorrelation during transport barrier evolution in a high-temperature fusion plasma." Physical review letters vol. 94,13 (2005): 135002. doi: https://doi.org/10.1103/PhysRevLett.94.135002
Nazikian R, Shinohara K, Kramer GJ, Valeo E, Hill K, Hahm TS, Rewoldt G, Ide S, Koide Y, Oyama Y, Shirai H, Tang W. Measurement of turbulence decorrelation during transport barrier evolution in a high-temperature fusion plasma. Phys Rev Lett. 2005 Apr 08;94(13):135002. doi: 10.1103/PhysRevLett.94.135002. Epub 2005 Apr 07. PMID: 15904000.
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Phys Rev Lett. 2005 Apr 08;94(13):135002. doi: 10.1103/PhysRevLett.94.135002. Epub 2005 Apr 07.

Measurement of turbulence decorrelation during transport barrier evolution in a high-temperature fusion plasma.

Physical review letters

R Nazikian, K Shinohara, G J Kramer, E Valeo, K Hill, T S Hahm, G Rewoldt, S Ide, Y Koide, Y Oyama, H Shirai, W Tang

Affiliations

  1. Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543, USA. [email protected]

PMID: 15904000 DOI: 10.1103/PhysRevLett.94.135002

Abstract

A low power polychromatic beam of microwaves is used to diagnose the behavior of turbulent fluctuations in the core of the JT-60U tokamak during the evolution of the internal transport barrier. A continuous reduction in the size of turbulent structures is observed concomitant with the reduction of the density scale length during the evolution of the internal transport barrier. The density correlation length decreases to the order of the ion gyroradius, in contrast with the much longer scale lengths observed earlier in the discharge, while the density fluctuation level remain similar to the level before transport barrier formation.

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