Search academic texts

Information × Registration Number 0221U100840, 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 09-01-2021 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 Experiments on the creation of plasma in a gas mixture of H2 + He in the conditions of a fundamental ion-cyclotron harmonic for hydrogen using a twin-coil antenna similar to the antenna B-7ex. It is established that depending on the pressure of the gas mixture, two modes can be implemented, which differ significantly in the density of the generated plasma. Based on the model, a one-dimensional numerical code was developed. In addition to the RF module, the numeric code is supplemented by a module for EC heating.The possibility of using a multi-probe thermodesorption diagnostic system to study the processes of desorption of residual and plasma-forming gases after cleaning the walls of the Hurricane-2M stelarator chamber with plasma discharges in hydrogen, helium and argon was tested. The operation of thermodesorption probes made of stainless steel and TiN coating in the U-2M chamber is compared. The presented diagnostics allows to carry out research of processes of gas release from stainless steel in the temperature range of 100-700С and to estimate quantity of monolayers of gas on its surface (ie quantity of impurity on a chamber wall). A numerical self-consistent model for stellarators has been developed, which includes a system of particle and energy balance equations for electrons and a boundary value problem for Maxwell's equations. A new module was developed and included in the code, which calculates the electron cyclotron heating on the second harmonic in the case of weak wave attenuation. Using this model, a test numerical simulation of high-frequency discharges in the cleaning mode in the B-7ex stelarator was performed. To measure the plasma current, a Rogovsky sensitive belt was designed, installed and tested, which allows to measure small currents in B-2M discharges with a small field В = 0.01 Т. The system for measuring plasma current based on the Rogovsky belt has been successfully tested in various categories of U-2M.   Product Description popup.authors BARON Demian I. Byrka Volodymyr I. Harkusha Ihor Ye GLAZUNOV Gennady P DREVAL Mykola B. Kovtun Yuri V. KOROVIN Valeriy B. KRASYUK Oleksandr Yu. LOZIN Oleksiy V. MAZNICHENKO Sergey M Myronova Liudmyla M. Moiseienko Volodymyr Ye. Panasko Tamara O. Skoryna Olena V Tarasov Igor K. popup.nrat_date 2021-03-17 Close