Author/Authors :
Lysoivan، نويسنده , , A.I. and Moiseenko، نويسنده , , V.E. and Plyusnin، نويسنده , , V.V. and Kasilov، نويسنده , , S.V and Bondarenko، نويسنده , , V.N. and Chechkin، نويسنده , , V.V. and Fomin، نويسنده , , I.P. and Grigorʹeva، نويسنده , , L.I. and Konovalov، نويسنده , , V.G. and Kovalʹov، نويسنده , , S.V. and Litvinov، نويسنده , , A.P. and Mironov، نويسنده , , Yu.K. and Nazarov، نويسنده , , N.I. and Pavlichenko، نويسنده , , O.S. and Pavlichenko، نويسنده , , R.O. and Shapoval، نويسنده , , A.N. and Skibenko، نويسنده , , A.I. and Volkov، نويسنده , , E.D.، نويسنده ,
Abstract :
Numerical and experimental results of Alfvén wave heating of plasmas in the frequency range below the ion cyclotron frequency (ω < ωci) are presented. Two different types of antenna were used for plasma production and heating: a frame type antenna (FTA) conventionally used in the URAGAN-3M device and a three-half-turn antenna (THTA) proposed recently to avoid the deleterious effects of conversion of fast wave to slow wave in the plasma periphery and to perform plasma core heating more effectively. Numerical modeling of electromagnetic field excitation in the URAGAN-3M plasma by the FTA and THTA was performed using a one-dimensional code. The results of calculations showed better performance of the compact THTA compared with the FTA for the case of a high density plasma (approximately 1013 cm−3). When using the THTA, the experiments performed showed the possibility of dense plasma production (more than 2 × 1013 cm−3) and heating, which had not been obtained earlier in the URAGAN-3M. Shifting the power deposition profile deeper inside the plasma body with the THTA resulted in modification of the plasma density profile and an improvement in plasma confinement.
