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

The First Lower Hybrid Current Drive Experiments in the Spherical Tokamak Globus-M

Oct 14, 2014, 8:30 AM
4h
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 1

Speaker

Mr Valeriy Dyachenko (A.F. Ioffe Physico-Technical Institute)

Description

The development of quasi-stationary methods of non-inductive current drive in plasmas of spherical tokamaks is extremely important for their using in thermonuclear devices. Specific properties of spherical tokamaks provide the possibilities the current drive by the waves of intermediate frequency range slowed down in poloidal direction. This approach, developed theoretically in the Ioffe Physical-technical institute and described in [1], is used now in LHCD experiments on the low aspect ratio tokamak Globus-M (R=0.36 m, a0=0.24 m, B0=0.4 T, Ip=0.2MA, elongation – 1.8, triangularity – (0.4-0.5), n0 = (3-5)•1019m-3, nb=1•1017m-3, Te0=400-800 eV). The grill consists of 10 waveguides with inner cross-section 90x10mm. The waveguides are oriented so that the electric RF fields on the fundamental waveguide mode TE10 were co-directed with poloidal direction in the tokamak. Numerical simulation confirms the quite good efficiency of current drive. The first experimental results are presented for input power level of 100 kW (2.45 GHz).The value of generated current is estimated by the drop of loop voltage as 20-40 kA. [1] E.Z. GUSAKOV, V.V.DYACHENKO et al. PPCF, 52, (2010), 075018
Paper Number TH/P1-34
Country or International Organisation Russian Federation

Primary author

Mr Valeriy Dyachenko (A.F. Ioffe Physico-Technical Institute)

Co-authors

Mr Alexander Saveliev (A.F. Ioffe Physico-Technical Institute) Mr Alexander Voronin (A.F. Ioffe Physico-Technical Institute) Mr Evgeniy Gusakov (A.F. Ioffe Physico-Technical Institute) Mr Mihail Irzak (A.F. Ioffe Physico-Technical Institute) Mr Nikolay Khromov (A.F. Ioffe Physico-Technical Institute) Mr Nikolay Sakharov (A.F. Ioffe Physico-Technical Institute) Mr Oleg Shcherbinin (A.F. Ioffe Physico-Technical Institute) Mr Sergey Khitrov (A.F. Ioffe Physico-Technical Institute) Mr Vasily Gusev (A.F. Ioffe Physico-Technical Institute) Mr Vladimir Varfolomeev (A.F. Ioffe Physico-Technical Institute) Mr Yuriy Petrov (A.F. Ioffe Physico-Technical Institute)

Presentation materials