Search academic texts

Information × Registration Number 0215U001727, 0114U001808 , R & D reports Title Experimental and theoretical modeling of physical processes in large fusion devices with a divertor popup.stage_title Head Chechkin Viktor Vasilievich, Registration Date 28-04-2015 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 Search for optimal regimes of RF plasma heating by the three-half-turn antenna (THTA) using the frame antenna (FA) for initial target plasma production is carried out on Uragan-3M torsatron. It is shown that 1) it is possible to produce plasma with a high average temperature and electron density ~ 5*10e12 cm-3 with THTA (compare with ~(1-3)*10e12 cm-3 using only FA); 2) a maximum temperature of plasma electrons, which can be achieved with THTA, does not depend on the initial temperature of plasma which is provided by the FA; 3) with sufficiently high initial electron density, using THTA , plasma with an average density of about 8*10e12 cm-3 and presumably also the high electron temperature can be obtained. A VHF discharge at a frequency of 140 MHz was used to clean the walls of the vacuum chamber of Uragan-2M to remove depositions of the vacuum oil. To sustaine a slow wave hydrogen plasma discharge, a special small antenna was designed and manufactured . The wave excitation and absorption were calculated using a one-dimensional numerical code. An experimental study of the discharge parameters, i.e. the magnitude of the magnetic field and the pressure of the hydrogen gas, was carried out. The Langmuir probes are used to obtain profiles of plasma density and electron temperature. The measurements showed that the plasma fills the entire confinement volume, and even steps outside. The characteristic values of the plasma density for this discharge are 10e10cm-3, and the electron temperature varies in the range of 3-10 eV. Discharge parameters only slightly sensitive to the hydrogen pressure and the magnetic field. Mass spectrometry of the residual gas showed that the discharge effectively cleans the walls of the chamber and removes vacuum oil. Product Description popup.authors Білецький Олексій Олександрович Войценя Володимир Сергійович Григор'єва Людмила Іванівна Древаль Микола Борисович Касілов Андрій Андрійович Козуля Михайло Михайлович Коровін Валерій Борисович Крамський Єгор Дмитрович Красюк Олександр Юрійович Кулак Мирон Степанович Кулик Юлія Сергіївна Лозін Олексій Васильович Мазніченко Сергій Михайлович Моісеєнко Володимир Євгенович Павліченко Ростислав Олегович Панасюк Вадим Миколайович Тарасов Ігор Кузьмич Тюпа Валерій Васильович Тюпа Ганна Олексіївна Цибенко Сергій Анатолійович popup.nrat_date 2020-04-02 Close