Formation of an internal transport barrier in the ohmic H-mode in the TUMAN-3M tokamak

Autor:	A. S. Tukachinsky, S. V. Krikunov, L. G. Askinazi, G. T. Razdobarin, N. A. Zhubr, L. S. Levin, V.E. Golant, S P Yaroshevich, V. V. Rozhdestvensky, V. A. Kornev, Alexander I. Smirnov, M V Andrejko, S. V. Lebedev
Rok vydání:	2000
Předmět:	Tokamak Materials science Physics and Astronomy (miscellaneous) Density gradient Thermodynamics Plasma Condensed Matter Physics ASTRA Thermal diffusivity law.invention Core (optical fiber) law Atomic physics Ohmic contact Scaling
Zdroj:	Plasma Physics Reports. 26:191-198
ISSN:	1562-6938 1063-780X
DOI:	10.1134/1.952838
Popis:	In experiments on studying the ohmic H-mode in the TUMAN-3M tokamak, it is found that, in high-current (I p∼120–170 kA) discharges, a region with high electron-temperature and density gradients is formed in the plasma core. In this case, the energy confinement time τ E attains 9–18 ms, which is nearly twice as large as that predicted by the ELM-free ITER-93H scaling. This is evidence that the internal transport barrier in a plasma can exist without auxiliary heating. Calculations of the effective thermal diffusivity by the ASTRA transport code demonstrate a strong suppression of heat transport in the region where the temperature and density gradients are high.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d75a91ddadf0b20034ec7f6dc689c2ad https://doi.org/10.1134/1.952838 Zobrazit plný text záznamu Plný text ve formátu PDF