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Multi-machine Scaling of the Amplitude of Density Fluctuations from the Size of the Tokamak

Autor: A. B. Altukhov, E. Z. Gusakov, A. D. Gurchenko, M.A. Buldakov, V.A. Vershkov, A. A. Petrov, V. G. Petrov, G. F. Subbotin, D. A. Shelukhin, M. A. Irzak

Publikováno v: Plasma Physics Reports. 47:637-646

The dependence was studied of the level of density fluctuations recorded at different devices on the minor and major radii of the tokamak. It is known that a high level of density fluctuations can negatively affect the operation of diagnostics, in pa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf5fd44420e6b938250cc062b988e99a
https://doi.org/10.1134/s1063780x2107014x

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Fast synthetic X-mode Doppler reflectometry diagnostics for the full-f global gyrokinetic modeling of the FT-2 tokamak

Autor: P. Niskala, A. D. Gurchenko, E. Z. Gusakov, M. A. Irzak, Timo Kiviniemi, L. A. Esipov, A. B. Altukhov, Susan Leerink

Publikováno v: PHYSICS OF PLASMAS. 25(8):1-9

The fast linear (Born approximation) version of the X-mode Doppler reflectometry (DR) synthetic diagnostics is developed in the framework of the ELMFIRE global gyrokinetic modeling of the FT-2 tokamak ohmic discharge. The DR signal frequency spectra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbf6785a442c6b26f8431cfd098d088a
https://doi.org/10.1063/1.5034781

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Transition into the improved core confinement mode as a possible mechanism for additional electron heating observed in the lower hybrid current drive experiments at the FT-2 tokamak

Autor: S. V. Shatalin, Artur Perevalov, M. A. Irzak, D. V. Kouprienko, A. D. Gurchenko, E. Z. Gusakov, S. I. Lashkul, L. A. Esipov, M. Yu. Kantor, A. B. Altukhov, V. V. Dyachenko, A. Yu. Stepanov, A. N. Saveliev

Publikováno v: Plasma Physics Reports. 43:711-719

In experiments on lower hybrid current drive (LHCD) carried out at the FT-2 tokamak, a substantial increase in the central electron temperature T e (r = 0 cm) from 550 to 700 eV was observed. A complex simulation procedure is used to explain a fairly

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e7bb2b0ff5adbfb91c3a4cbd13e90c30
https://doi.org/10.1134/s1063780x1707008x

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Validation of full-f global gyrokinetic modeling results against the FT-2 tokamak Doppler reflectometry data using synthetic diagnostics

Autor: Carsten Lechte, E. Z. Gusakov, A. B. Altukhov, L. Chôné, P. Niskala, M. A. Irzak, A. D. Gurchenko, A.V. Sidorov, L. A. Esipov, Timo Kiviniemi, O. L. Krutkin, Stéphane Heuraux, Susan Leerink, G. Zadvitskiy

Publikováno v: Nuclear Fusion
Nuclear Fusion, IOP Publishing, 2019, 59, pp.096017. ⟨10.1088/1741-4326/ab1cfb⟩
Nuclear Fusion, 2019, 59, pp.096017. ⟨10.1088/1741-4326/ab1cfb⟩

International audience; Two versions of the X-mode Doppler reflectometry (DR) synthetic diagnostics are developed within the framework of the ELMFIRE global gyrokinetic modeling of the FT-2 tokamak ohmic discharge. In the 'fast' version the DR signal

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f996adcec5993331263d51ba6fbea9c2
https://hal.univ-lorraine.fr/hal-02434476

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On a new scenario for the saturation of the low-threshold two-plasmon parametric decay instability of an extraordinary wave in the inhomogeneous plasma of magnetic traps

Autor: A. Yu. Popov, E. Z. Gusakov, M. A. Irzak

Publikováno v: Journal of Experimental and Theoretical Physics. 123:723-734

The most probable scenario for the saturation of the low-threshold two-plasmon parametric decay instability of an electron cyclotron extraordinary wave has been analyzed. Within this scenario two upperhybrid plasmons at frequencies close to half the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::84df3a1f911b4d83463789e6dace5027
https://doi.org/10.1134/s1063776116110108

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Investigation of nonlinear effects in Doppler reflectometry using full-wave synthetic diagnostics

Autor: Stéphane Heuraux, Susan Leerink, A. B. Altukhov, M. A. Irzak, A. D. Gurchenko, L. A. Esipov, E. Z. Gusakov, P. Niskala, Timo Kiviniemi, G. Zadvitskiy, Carsten Lechte, O. L. Krutkin

Publikováno v: Plasma Science and Technology
Plasma Science and Technology, IOP Publishing, 2020, 22, pp.064001. ⟨10.1088/2058-6272/ab5c28⟩

openaire: EC/H2020/633053/EU//EUROfusion In this work, Doppler reflectometry (DR) and radial correlation DR (RCDR) nonlinear scattering effects are studied using full-wave modeling with a set of representative FT-2 tokamak turbulence as inputs. Narro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd46fb52a7475c42f69ed5127aa5ea62
https://doi.org/10.1088/2058-6272/ab5c28

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Simulation of the conditions of wave excitation for the optimization of the lower hybrid current drive in the Globus-M spherical tokamak

Autor: E. D. Cherotchenko, M. A. Irzak, O. N. Shcherbinin, V. V. Dyachenko

Publikováno v: Plasma Physics Reports. 39:120-129

At present, the method of current drive by means of lower hybrid waves is not applied to low-aspect-ratio tokamaks, because, in the traditional approach, it would be necessary to use waves with a very high slowing-down factor. However, studies of new

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b4f07230e2e0763c659f936a4c740fca
https://doi.org/10.1134/s1063780x13020013

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Influence of the probing wave phase modulation on the X-mode radial correlation Doppler reflectometry performance in the FT-2 tokamak

Autor: E. Z. Gusakov, A. B. Altukhov, Susan Leerink, A. D. Gurchenko, P. Niskala, M. A. Irzak, Timo Kiviniemi, L. A. Esipov, O. L. Krutkin

Publikováno v: Physics of Plasmas. 25:112503

The cross-correlation function of high field side radial correlation X-mode Doppler reflectometry (DR) measured in the FT-2 tokamak experiment is shown to be a factor of three narrower than that computed using the fast linear (Born approximation) ver

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9efef4ab144731af156013db83f15cb
https://doi.org/10.1063/1.5051815

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Analysis of the efficiency of lower hybrid current drive in the FT-2 tokamak

Autor: D. V. Kuprienko, A. V. Sidorov, L. A. Esipov, S. I. Lashkul, V. V. Dyachenko, A. B. Altukhov, A. N. Savel’ev, A. Yu. Stepanov, M. Yu. Kantor, M. A. Irzak, S. V. Shatalin, A. D. Gurchenko

Publikováno v: Plasma Physics Reports. 36:751-761

Results are presented from experimental studies of the efficiency of lower hybrid current drive (LHCD) in the FT-2 tokamak. The dependence of the LHCD efficiency on the grill phasing Δφ and RF oscillator power was determined experimentally in a wid

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bbd231c57b0bb2b653cbe1b426c5357d
https://doi.org/10.1134/s1063780x10090011

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Conceptual design of the lower hybrid current drive system for the T-15 tokamak

Autor: M. A. Irzak, V. V. Dyachenko, A. N. Saveliev, O. N. Shcherbinin, S. A. Khitrov, E. Z. Gusakov

Publikováno v: Plasma Devices and Operations. 16:189-210

A conceptual design of the lower hybrid current drive (LHCD) system for the upgraded T-15 tokamak (RNC Kurchatov Institute, Moscow) is presented. A tentative theoretical analysis, including extensive numerical simulations of different antenna types a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8b53f1ea11f550cb2fac6e93924c5488
https://doi.org/10.1080/10519990802278056

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