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Information × Registration Number 0222U000999, 0120U102649 , R & D reports Title Creation of a mixed plasma, study of critical plasma instabilities and preparation of internal vacuum surfaces of the Hurricane-2M installation using an antenna similar to the antenna of the W7-X stellarator popup.stage_title Head Moiseenko Volodymyr E., Кандидат фізико-математичних наук Registration Date 23-01-2022 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 Experiments on U-2M to obtain RF plasma in a mixture of H2 + He showed that the highest plasma density can be obtained from a gas mixture with 14% hydrogen in helium. The generated plasma has a high density (~ 1013 cm-3), low electron temperature (~ 20 eV). High-frequency plasma generation in the ion-cyclotron frequency range has been successfully demonstrated at LHD (Japan). No dangerous voltage increase on the elements of the RF system and the occurrence of an arc was detected. The main limitation of the experiments is low RF power. The resulting plasma can be used as a target for further injection of fast neutral atoms to increase the density and heat the generated plasma. The method of direct modeling of MHD modes based on integrated SXR diagnostic data was first used for W7-X geometry. Poloidal mode structures are modeled by radially localized regions of Gaussian emission that rotate along magnetic surfaces. A set of models with constant phase velocity and phase velocity depending on the poloidal angle is considered. All models show that in the case of high m mode the phase diagram is determined mainly by the poloidal mode number m and the radial location of the mode ρ. In particular, in the category № 180918045, three single branches m of fashion with poloidal mode numbers m = 8, m = 10, m = 11, localized at ρ≈0.3 and rotated clockwise (when viewed in the positive toroidal direction). Thermodesorption experiments were performed to study the process of helium separation from 12X18H10T stainless steel after exposure to stationary glow discharge plasma in He atmosphere. Volt-ampere characteristics in different modes were measured and the energy of He ions was estimated. The GDC system was designed, manufactured and installed on the U-2M. The first experimental studies of GDC in an argon atmosphere were performed. The GDC system on the U-2M expands the experimental capabilities during experiments on cleaning the vacuum chamber.  Product Description popup.authors BARON Demian I. BYRKA Volodymyr I. GLAZUNOV Gennady P. Dreval Mykola В. KOVTUN Yuriy V KOZULYA Mykhaylo М. KRASYUK Oleksandr Yu KULIK Yulia S LYSTOPAD Viktor M. MAZNICHENKO Sergey M MARTSENYUK Yuriy P. Myronova Lyudmyla Mykolayivna Syusko Yevhen V. TARASOV Igor К. popup.nrat_date 2022-03-09 Close