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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

Review of Globus-M Spherical Tokamak Results

Oct 13, 2014, 2:00 PM
4h 45m
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Board: OV/P-03
Overview Poster OV - Overviews Overview Posters

Speaker

Mr Vasily Gusev (Russian Federation)

Description

First experiments on noninductive current drive (CD) using lower hybrid waves at 2.45 GHz are described. Waves were launched by a 10 waveguide grill with 120° phase shift between neighboring waveguides. The experimental conditions for a poloidal slowing-down scheme are described. The CD efficiency is found to be somewhat less than for standard tokamak lower hybrid CD. Geodesic acoustic modes (GAM) have been discovered in Globus-M with the help of two Doppler reflectometers. GAMs are localized 2-3 cm inside the separatrix. The GAM frequency agrees with theory whereas the density oscillations is found to have mainly an n=0, m=0 spatial structure. Fast particle confinement during neutral beam injection has been studied and numerically simulated. Alfven instabilities excited by fast particles were detected by a toroidal Mirnov probe array. Their excitation conditions are discussed and the dynamics of fast ion losses induced by Alfven eigenmodes is presented. Unlike for conventional tokamaks, no isotopic effect on confinement has been observed in ohmic discharges comparing similar D and H plasmas. Plasma transport was modelled self consistently from the magnetic axis to the material wall. SOL parameters are compared with experimental results. For plasma-wall interaction studies a specific divertor target consisting of an a-priory damaged tungsten tiles was prepared. The damage was induced by an electron beam or by a plasma gun jet. The damage factor was equivalent to the damage produced by 100 -1000 ELM events in ITER. The first results show a strongly nonuniform temperature field formation on the damaged targets after plasma disruptions. A preliminary explanation is that the initial damage gives rise to a layer with low thermal conductivity right under the surface. We will finish explaining specific engineering design issues of the next step - Globus-M2 (1 T, 500 MA) and describe the status of component manufacture.
Paper Number OV/P-03
Country or International Organisation Russian Federation

Primary author

Mr Vasily Gusev (Russian Federation)

Co-authors

Dr Alexander Gorodetskiy (A.N. Frumkin Institute of Physical Chemistry and Electrochemistry) Mr Alexander Petrov (Saint Petersburg State Polytechnical University) Dr Alexander Saveliev (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Alexander Voronin (Ioffe Physical-Technical Institute of Russian Academy of Science) Mr Alexander Yashin (Saint Petersburg State Polytechnical University) Mr Alexandr Novokhatsky (Ioffe Physical-Technical Institute of the Russian Academy of Sciences) Mr Alexey Bykov (Saint Petersburg State Polytechnical University) Dr Alexey Labusov (D.V. Efremov Institutes of Electrophysical Apparatus) Mrs Alsu Iblyaminova (Ioffe Physical-Technical Institute of Russian Academy of Science) Mr Andrei Melnik (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Andrei Zakharov (A.N. Frumkin Institute of Physical Chemistry and Electrochemistry) Dr Boris Ber (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Eduard Bondarchuk (D.V. Efremov Institutes of Electrophysical Apparatus) Dr Elena Demina (A.A. Baikov Institute of Metallurgy and Materials Science) Ms Elena Vekshina (Saint Petersburg State Polytechnical University) Dr Elizaveta Kaveeva (Saint Petersburg State Polytechnical University) Dr Eugene Mukhin (Ioffe Physical-Technical Institute of Russian Academy of Science) Prof. Evgeniy Gusakov (Ioffe Physical-Technical Institute of Russian Academy of Science) Mr Evgeniy Zhilin (Ioffe Fusion Technologies Ltd) Dr Fedor Chernyshev (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Fritz Wagner (Max-Planck Institute for Plasma Physics) Mr Georgii Zadvitskiy (Saint Petersburg State Polytechnical University) Dr Gleb Kurskiev (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Igor Mazul (D.V. Efremov Institutes of Electrophysical Apparatus) Mr Igor Miroshnikov (Saint Petersburg State Polytechnical University) Dr Ilya Senichenkov (Saint Petersburg State Polytechnical University) Dr Michael Patrov (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Michail Irzak (Ioffe Physical-Technical Institute of Russian Academy of Science) Mr Mikhail Khokhlov (D.V. Efremov Institutes of Electrophysical Apparatus) Mr Nikolai Litunovsky (D.V. Efremov Institutes of Electrophysical Apparatus) Mr Nikolay Bakharev (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Nikolay Khromov (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Nikolay Sakharov (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Oleg Shcherbinin (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Pavel Goncharov (Saint Petersburg State Polytechnical University) Mr Peter Shchegolev (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Rinad Zalavutdinov (A.N. Frumkin Institute of Physical Chemistry and Electrochemistry) Mr Sergei Krasnov (D.V. Efremov Institutes of Electrophysical Apparatus) Dr Sergei Tolstyakov (Ioffe Physical-Technical Institute of Russian Academy of Science) Mr Sergei Voskoboinikov (Saint Petersburg State Polytechnical University) Mr Sergey Khitrov (Ioffe Physical-Technical Institute of Russian Academy of Science) Mr Sergey Lepikhov (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Valerij Dyachenko (Ioffe Physical-Technical Institute of Russian Academy of Science) Dr Victor Bulanin (Saint Petersburg State Polytechnical University) Dr Victor Tanchuk (D.V. Efremov Institutes of Electrophysical Apparatus) Dr Vladimir Minaev (Ioffe Physical-Technical Institute of Russian Academy of Science) Prof. Vladimir Rozhansky (St.Petersburg State Polytechnical University) Prof. Vladimir Sergeev (Saint-Petersburg State Polytechnical University) Dr Vladimir Varfolomeev (Ioffe Physical-Technical Institute of Russian Academy of Science) Mr Vyacheslav Mikov (Joint-Stock Company "INTEHMASH") Dr Yuriy Petrov (Ioffe Physical-Technical Institute of Russian Academy of Science)

Presentation materials