dorsal/arxiv
View SchemaPoloidal inhomogeneity of the particle fluctuation induced fluxes near of the LCFS at lower hybrid heating and improved confinement transition at the FT-2 tokamak
| Authors | Sergei Lashkul, Sergei Shatalin, Alexei Altukhov, Alexei Gurchenko, Evgenii Gusakov, Valerii Dyachenko, Lev Esipov, Mihail Kantor, Denis Kouprienko, Alexsandr Stepanov, Andrei Sharpeonok, Elena Vekshina |
|---|---|
| Categories | |
| ArXiv ID | physics/0410088 |
| URL | https://arxiv.org/abs/physics/0410088 |
| DOI | 10.1007/s10582-005-0045-7 |
Abstract
This paper deals with the new spectral and microturbulence experimental data and their analysis, which show, that the radial electric field Er generated at the LH heating (LHH) in the FT-2 is high enough to form the transport barriers. The ETB is formed when LHH is switched off. The radial fluctuation-induced EB drift flux densities near LCFS in SOL are measured at two different poloidal angles. For this purpose two Langmuir probes located at low and high field sides of the torus are used. Registration of the poloidal and radial components of the electric field and density fluctuations at the same time during one discharge permits to measure the poloidal asymmetry of the transport reduction mechanism of the radial and poloidal particle fluxes in the SOL. The absolute E(~) fluctuation levels show dependence on the sign of Er shear. The modification of the microscale turbulence by the poloidal Er x B rotation shear EB at the L - H transition near LCFS is also studied by X-mode fluctuation Reflectometry. The new data were obtained by spatial spectroscopic technique.
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"date_created": "2026-03-02T18:00:53.424000Z",
"date_modified": "2026-03-02T18:00:53.424000Z",
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"abstract": "This paper deals with the new spectral and microturbulence experimental data\nand their analysis, which show, that the radial electric field Er generated at\nthe LH heating (LHH) in the FT-2 is high enough to form the transport barriers.\nThe ETB is formed when LHH is switched off. The radial fluctuation-induced\nE\u0026#61620;B drift flux densities near LCFS in SOL are measured at two different\npoloidal angles. For this purpose two Langmuir probes located at low and high\nfield sides of the torus are used. Registration of the poloidal and radial\ncomponents of the electric field and density fluctuations at the same time\nduring one discharge permits to measure the poloidal asymmetry of the transport\nreduction mechanism of the radial and poloidal particle fluxes in the SOL. The\nabsolute E(~)\u0026#61553; fluctuation levels show dependence on the sign of Er\nshear. The modification of the microscale turbulence by the poloidal Er x B\nrotation shear \u0026#61559;E\u0026#61620;B at the L - H transition near LCFS is also\nstudied by X-mode fluctuation Reflectometry. The new data were obtained by\nspatial spectroscopic technique.",
"arxiv_id": "physics/0410088",
"authors": [
"Sergei Lashkul",
"Sergei Shatalin",
"Alexei Altukhov",
"Alexei Gurchenko",
"Evgenii Gusakov",
"Valerii Dyachenko",
"Lev Esipov",
"Mihail Kantor",
"Denis Kouprienko",
"Alexsandr Stepanov",
"Andrei Sharpeonok",
"Elena Vekshina"
],
"categories": [
"physics.plasm-ph"
],
"doi": "10.1007/s10582-005-0045-7",
"title": "Poloidal inhomogeneity of the particle fluctuation induced fluxes near of the LCFS at lower hybrid heating and improved confinement transition at the FT-2 tokamak",
"url": "https://arxiv.org/abs/physics/0410088"
},
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