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Information × Registration Number 0312U003087, 0106U011414 , R & D reports Title Collective phenomena and transport processes in plasmas of toroidal systems popup.stage_title Розвиток теорії магнітогідродинамічної активності плазми в токамаках та сферичних торах. Вивчення нелінійної активності в системах поблизу границі стійкості. Head Kolesnichenko Yaroslav, Доктор фізико-математичних наук Registration Date 09-02-2012 Organization Institute For Nuclear Research Of National Academy Of Sciences Of Ukraine popup.description2 A new phenomenon - the spatial channelling of the energy and momentum of energetic ions during the excitation of plasma instabilities by these ions - is discovered. A theory is developed, which shows that the plasma compressibility strongly affects the properties of the m=n=1 mode. Two new types of fishbone instabilities - the resonant continuum mode and the resonant gap mode - are predicted. The radiation of kinetic Alfven waves (KAW) by the so-called NGAE modes and RSAE modes is studied analytically and numerically. Using numerical methods, it is shown that even a weak deviation from the axial symmetry of the magnetic configuration can drastically change the spatial structure of the TAE modes in tokamaks. It is shown that in the tokamaks with the broad low-shear central region and the central safety factor q0~1 there exists a low-frequency global Alfven eigenmode capable to resonate with the precession of trapped energetic ions. The effect of the plasma pressure on the low-shear toroidal Alfven eigenmodes (TAE) is investigated. The losses of ions accelerated by the ion-cyclotron plasma heating are studied. The precession of trapped particles in equilibrium configurations with the magnetic valley is studied. A theory of the stochastic diffusion of the transient particles in the Wandelstein-type stellarator configurations is improved by means of a more accurate description of the particles crossing the separatrix between the regions of the passing and trapped particles in the phase space. Product Description popup.authors Бурдо Олег Семенович Голобородько Віктор Ярославович Кириця Володимир Леонідович Колесниченко Ярослав Іванович Луценко Вадим Васильович Марченко Віктор Станіславович Резник Святослав Миколайович Тихий Антон Володимирович Фесенюк Олександр Петрович Яворський Віктор Олександрович Яковенко Юрій Володимирович popup.nrat_date 2020-04-02 Close