Перегляд за автором "Dreval, M.B."

Сортувати за: Порядок: Результатів:

  • Accuracy of electrostatic energy analyzer in HIBP diagnostic 
    Bondarenko, J.S.; Chmyga, A.A.; Dreval, M.B.; Eliseev, L.G.; Khrebtov, S.M.; Komarov, A.D.; Kozachok, A.S.; Krupnik, L.I.; Melnikov, A.V.; Nedzelskij, I.S. (Вопросы атомной науки и техники, 2002)
  • Design and initial operation of multichord soft X-ray detection array on the U-3M torsatron 
    Dreval, M.B. (Вопросы атомной науки и техники, 2014)
    A miniature pinhole camera array for spatially and temporally resolved measurements of soft X-ray emission has been designed and installed in the URAGAN-3M torsatron. Two features of the U-3M: a) very large vacuum vessel; ...
  • Design of multichord soft x-ray detection arrays for the Uragan-2M stellarator 
    Dreval, M.B. (2010)
    Two miniature pinhole camera arrays for spatially and temporally resolved measurements of soft X-ray emission have been designed for the Uragan-2M stellarator. The power of soft X-ray filtered by different filters has been ...
  • Development of light atomic injector for beam emission spectroscopy (BES) diagnostic of Uragan-2M torsatron 
    Komarov, O.D.; Krupnik, L.I.; Chmyga, O.O.; Deshko, G.M.; Dreval, M.B.; Klosovskiy, A.V.; Kozachok, O.S.; Khrebtov, S.M.; Maznichenko, S.M.; Volkov, V.A. (Вопросы атомной науки и техники, 2019)
    The improvement of the light atomic injector for beam emission spectroscopy (BES) diagnostic for Uragan-2M was held. The investigation was carried out with the energy of the sodium ion beam was 20…25 keV, the ion current ...
  • Distribution of 0.2…4.5 keV plasma ions in set of U-2M discharges 
    Slavnyj, A.S.; Pavlichenko, R.O.; Shapoval, A.N.; Makhov, M.N.; Dreval, M.B. (Вопросы атомной науки и техники, 2021)
    Charge exchange (CX) neutral fluxes were measured by neutral particle analyzer (NPA) in plasma discharges sustained by the W7-X-like radio frequency (RF) antenna in the Uragan-2M (U-2M) stellarator. CX fluxes in pure ...
  • Dynamics of the main plasma parameters during spontaneous transition into the mode of improved confinement in torsatron U-3M 
    Pashnev, V.K.; Sorokovoy, E.L.; Petrushenya, A.A.; Mironov, Yu.K.; Konovalov, V.G.; Shapoval, A.N.; Slavnyj, A.S.; Dreval, M.B.; Pugovkin, A.P. (2010)
    The work [1] contains discussion about the changes in plasma energy content and energy lifetime during the transition into the mode of improved confinement at RF-heating in torsatron U-3M in range of rare collision frequencies ...
  • First results of multichord soft x-ray detection array on the U-3M torsatron 
    Dreval, M.B. (Вопросы атомной науки и техники, 2015)
    A miniature pinhole camera array for spatially and temporally resolved measurements of soft X-ray plasma emission has been recently installed on the U-3M. The diagnostics has been tested in different types of the U-3M ...
  • Fusion research in stellarator department of IPP NSC KIPT 
    Moiseenko, V.Е.; Dreval, M.B.; Kovtun, Yu.V.; Kulyk, Yu.S.; Glazunov, G.P.; Kazakov, Ye.O.; Ongena, J.; Sharapov, S.E.; Thomsen, H.; Garkusha, I.E. (Problems of Atomic Science and Technology, 2022)
    This paper briefly describes intrinsic and collaborative scientific activities in the Stellarator Department of the Institute of Plasma Physics of the National Science Center “Kharkov Institute of Physics and Technology” ...
  • Heavy ion beam injectors for the plasma potential and electron temperature measurements 
    Bondarenko, I.S.; Chmyga, O.O.; Dreval, M.B.; Khrebtov, S.M.; Komarov, O.D.; Kozachok, O.S.; Krupnik, L.I.; Cabral, J.C.; Malaquias, A.; Nedzelskiy, I.S.; Varandas, C.F. (Вопросы атомной науки и техники, 2000)
  • Influence of movable B₄C-limiter on characteristics of RF discharge plasma in the Uragan-2M torsatron 
    Glazunov, G.P.; Lozin, A.V.; Konotopskiy, A.L.; Baron, D.I.; Beletskii, A.A.; Bondarenko, M.N.; Chechkin, V.V.; Dreval, M.B.; Grigor’eva, L.I.; Kozulya, M.M.; Maznichenko, S.M.; Moiseenko, V.E.; Mironov, Yu.K.; Pavlichenko, R.O.; Romanov, V.S.; Shapoval, A.N. (Вопросы атомной науки и техники, 2019)
    A variant of the B₄C movable biased pumped limiter for the Uragan-2M torsatron is described. Some results of experiments with the limiter moved from the vacuum chamber wall to the central region of the plasma column in the ...
  • Influence of the photodiode spectral sensitivity on the temperature estimation by sxr using thin filtering foils in Uragan-3M 
    Dreval, M.B.; Turianska, O.V.; Pahur, A.S. (Вопросы атомной науки и техники, 2020)
    Soft X-ray (SXRƚ diagnostics is routinely used in Uragan-3M (U-3M) torsatron. One of the SXR diagnostic applications is based on the plasma temperature estimation. The ratio of SXR signals passed through two different foils ...
  • Low frequency oscillations in U-2M conditioning RF discharges 
    Dreval, M.B.; Shapoval, A.M.; Beletskii, A.A.; Pavlichenko, R.O.; Ozherel’yev, F.I.; Makhov, M.M. (Вопросы атомной науки и техники, 2018)
    MHD oscillations were studied in low magnetic field (B₀ = 0.01 T) radio frequency discharges of the URAGAN-2M (U-2M) stellarator. Coherent oscillations are observed by bolometers, triple Langmuir probe microwave ...
  • Observation of 1…20 kHz fluctuations in the Uragan-2M torsatron 
    Dreval, M.B.; Pavlichenko, R.O.; Shapoval, A.M.; Ozherelyev, F.I.; Mironov, Yu.K.; Romanov, V.S.; Makhov, M.M.; Zamanov, N.V.; Kulaga, A.E. (Вопросы атомной науки и техники, 2016)
    First observations of plasma fluctuations in the frequency range of 1…20 kHz in various plasma conditions of the URAGAN-2M (U-2M) torsatron are presented. Observed fluctuations of the Hα emissivity are coherent with the ...
  • Plasma profiles, self-organization and alfven eigenmodes studies using the HIBP diagnostic in the TJ-II stellarator 
    Krupnik, L.I.; Barcala, J.M.; Cappa, A.; Chmyga, O.O.; Dreval, M.B.; Hidalgo, C.; Khrebtov, S.M.; Komarov, O.D.; Kozachok, O.S.; Martínez, J.; Molinero, A.; Pablos, J.L. (Problems of Atomic Science and Technology, 2023)
    This paper reports recent experiments in the TJ-II stellarator using a dual Heavy Ion Beam probe diagnostic. The studies were focused on characterizing plasma potential profiles, investigating self-organization mechanisms ...
  • Radio-frequency plasma start-up at Uragan-3M stellarator 
    Moiseenko, V.E.; Lyssoivan, A.; Wauters, T.; Tripský, M.; Lozin, A.V.; Pavlichenko, R.O.; Kozulya, M.M.; Dreval, M.B.; Mironov, Yu.K.; Romanov, V.S.; Kulaga, A.Ye.; Zamanov, N.V.; Shapoval, A.N.; Konovalov, V.G.; Chechkin, V.V.; Grigor’eva, L.I.; Beletskii, A.A.; Kasilov, A.A.; Garkusha, I.E. (Вопросы атомной науки и техники, 2017)
    A double frame antenna with a broad spectrum of parallel wavenumbers (with respect to the magnetic field) is used for radio-frequency (RF) plasma production in Uragan-3M stellarator type device. The delay between the start ...
  • RF heating below ion-cyclotron frequencies in Uragan torsatrons 
    Moiseenko, V.E.; Dreval, M.B.; Burchenko, P.Ya.; Losin, A.V.; Berezhnyj, V.L.; Bondarenko, V.N.; Chechkin, V.V.; Grigor’eva, L.I.; Hartmann, D.; Koch, R.; Konovalov, V.G.; Kotsubanov, V.D.; Kramskoi, Ye.D.; Kulaga, A.E.; Lyssoivan, A.I.; Mironov, V.K.; Pavlichenko, R.O.; Romanov, V.S.; Shapoval, A.N.; Skibenko, A.I.; Slavnyi, A.S.; Tereshin, V.I.; Voitsenya, V.S. (2010)
    The experiments on Uragan-3M torsatron (stellarator) on Alfvén resonance heating are presented. Usage of the three-halfturn antenna provides plasma density increase and heating of the electron plasma component.
  • Self-consistent model of the RF plasma production in stellarator 
    Moiseenko, V.Е.; Stadnik, Yu.S.; Lyssoivan, A.I.; Dreval, M.B. (2010)
    Self-consistent model of the RF plasma production in stellarator that includes system of the balance equations and the boundary problem for the Maxwell’s equations is developed. The first numerical calculations of RF plasma ...
  • Stellarator research at IPP KIPT: status and prospects 
    Moiseenko, V.E.; Glazunov, G.P.; Lozin, A.V.; Konotopskiy, A.L.; Baron, D.I.; Beletskii, A.A.; Bondarenko, M.N.; Chechkin, V.V.; Dreval, M.B.; Grigor’eva, L.I.; Kozulya, M.M.; Maznichenko, S.M.; Mironov, Yu.K.; Pavlichenko, R.O.; Romanov, V.S.; Shapoval, A.N.; Korovin, V.B.; Konovalov, V.G.; Zamanov, N.V.; E.V., Turianska; Kulyk, Yu.S.; Wauters, T.; Lyssoivan, A.I.; Ågren, O.; Garkusha, I.E.; Uragan-2M Team (Вопросы атомной науки и техники, 2019)
    Features of the recent Uragan-2M campaign are reviewed together with some theoretical advances. They include experiments with B4C limiter, studies of various 1…20 kHz oscillations, development of a new in-situ diagnostics ...
  • Transition to the improved confinement mode in torsatron U-3M in range of rare collision frequencies 
    Pashnev, V.K.; Sorokovoy, E.L.; Berezhnyj, V.L.; Burchenko, P.Ya.; Volkov, E.D.; Krasnyj, V.V.; Lozin, A.V.; Mironov, Yu.K.; Petrushenya, A.A.; Pinos, I.B.; Skibenko, A.I.; Slavnyj, A.S.; Dreval, M.B.; Kulaga, A.Ye.; Tsybenko, S.A.; Es’kov, A.Yu. (2010)
    Transition to the mode of improved plasma confinement in U-3M facility earlier was discussed in works [1-3]. In these studies discussed the various processes in the confinement volume and in the peripheral plasma that ...
  • U-3M plasma startup scenario sustained by gas puffing as a different plasma confinement scenario: first results 
    Dreval, M.B.; Sorokovoy, E.L.; Mironov, Yu.K.; Pavlichenko, R.O.; Lozin, A.V.; Romanov, V.S.; Pashnev, V.K. (Вопросы атомной науки и техники, 2013)
    In order to reduce flux of neutrals into the plasma confinement volume, discharge start-up scenario maintained by impulse gas puffing (GP) has been proposed. Absence of constant working gas feeding in this scenario opens ...