A5021721241- Magnetic confinement fusion research
- Plasma Diagnostics and Applications
- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Fusion materials and technologies
- Laser-induced spectroscopy and plasma
- Ionosphere and magnetosphere dynamics
- Atomic and Subatomic Physics Research
- Laser Design and Applications
- Solar and Space Plasma Dynamics
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- Vacuum and Plasma Arcs
- Mass Spectrometry Techniques and Applications
- Dust and Plasma Wave Phenomena
- Electrohydrodynamics and Fluid Dynamics
- Cold Fusion and Nuclear Reactions
- Particle Detector Development and Performance
- Spectroscopy and Laser Applications
- Quantum, superfluid, helium dynamics
- Plasma Applications and Diagnostics
- Laser Material Processing Techniques
- Fluid Dynamics and Turbulent Flows
Budker Institute of Nuclear Physics
2016-2025
Siberian Branch of the Russian Academy of Sciences
2012-2025
Novosibirsk State University
2010-2024
Russian Academy of Sciences
2008-2012
Weatherford College
2003
This Letter describes plasma discharges with a high temperature of bulk electrons in the axially symmetric high-mirror-ratio (R=35) open magnetic system gas dynamic trap (GDT) Budker Institute (Novosibirsk). According to Thomson scattering measurements, on-axis electron averaged over number sequential shots is 660±50 eV density being 0.7×10^{19} m^{-3}; few shots, exceeds 900 eV. corresponds at least threefold increase respect previous experiments both GDT and other comparable machines,...
Interaction between shear flows and plasma instabilities in axially symmetric mirrors can lead to improved confinement, observed both experiments on the gas dynamic trap simulations. Shear flows, driven via biased end plates limiters, combination with finite-larmor-radius effects are shown be efficient confining high-beta plasmas even a magnetic hill axis. Interpretation of such as vortex i.e., confinement core dead-flow zone vortex, is agree well Theoretical scaling laws predict scheme...
This paper summarizes the results of experiments on electron cyclotron resonance heating (ECRH) plasma obtained at axially symmetric magnetic mirror device gas dynamic trap (GDT) (Budker Institute, Novosibirsk). The main achievement is demonstration discharges with extremely high temperatures bulk electrons. According to Thomson scattering measurements, on-axis temperature averaged over several sequential shots 660 ± 50 eV peak values exceeding 900 in a few shots. corresponds an least...
Development of a new linear device for confinement fusion plasmas is under way in the Budker Institute Nuclear Physics, Novosibirsk. The combines features existing GOL-3 and GDT traps, namely, central GDT-like cell with sloshing ions produced by intense neutral beam injection, multiple-mirror end sections suppression axial plasma losses. It designed as prototype an energy-efficient neutron source testbed development mirror-based reactors.
A so called vortex confinement of plasma in axially symmetric mirror device was studied. This recently developed approach enables to significantly reduce transverse particle and heat losses typically caused by MHD instabilities which can be excited this case. Vortex regime established application different potentials the radial limiters end-plates. As a result, sheared flow at periphery appears wraps core. Experiments were carried out on gas dynamic trap device, where hot ions with mean...
The paper provides an overview of the results obtained on spherical tokamak Globus-M2 in 2019–2020. experiments were performed with toroidal magnetic field up to 0.8 T and plasma current 0.4 MA (80% design values). temperature electrons 1 keV ions 800 eV at density 1020 m−3 recorded neutral beam injection (850 kW, 28.5 keV). Heat conductivity analysis was made by means codes ASTRA 7.0, NCLASS, SPIDER, NUBEAM, 3D fast ion tracking algorithm basis experimental data. A scaling for tokamaks,...
A dispersion interferometer based on a continuous-wave CO2 laser source (λ=9.57 μm) with double plasma passage for measurements of the line-integrated electron density in TEXTOR tokamak and GDT linear system has been developed tested experiments. sensitivity 〈nel〉min=2×1017 m−2 temporal resolution 1 ms have achieved. The does not need any rigid frame vibration insulation. Its basic components are installed compactly an optical bench placed stable support outside torus. possibility...
Having the ability to control operation of advanced plasma heating methods is essential for achievement fusion-relevant plasmas in open traps. We describe a technique deal with increased transport brought about by electron cyclotron axisymmetric magnetic mirror device. The based on shaping potential means set specifically biased electrodes facing at both ends trap. In experiments combined microwave and neutral beam performed gas-dynamic trap (GDT) facility Budker Institute, we show that...
The paper presents the project and development strategy of a continuously operating high-flux (>) fusion volumetric neutron source. proposed facility is based on gas-dynamic magnetic plasma confinement device with high-power () neutral beam injection. Project roadmap includes construction several prototype installations addressing specific set physics engineering problems, starting from continuous operation critical subsystems ending advanced problems to axisymmetric mirror-based machines....
A curvature-driven flute instability will be excited in the magnetized plasmas if magnetic field lines curve toward entire plasma boundary. Conditions under which it can effectively stabilized axisymmetric geometry have been experimentally studied a gas-dynamic trap (GDT) at Novosibirsk. Flexible design of experimental device and availability neutral beams ion cyclotron heating enabled pressure-weighted curvature to varied over wide range. The stability limits were thus measured compared...
A dispersion interferometer for measurements of line plasma density has been developed with a sensitivity 〈ne l〉min = 1013 cm−2 and temporal resolution 10 μs. The main advantages the are compactness minimal to vibrations. does not require specific vibration isolation structure can be mounted directly on working chamber device. use short-wave radiation (λ=1.06 μm) eliminates influence refraction enables one quartz windows, which most resistant neutron gamma radiation. above-mentioned have...
Physics aspects of a new system for electron cyclotron resonance heating (ECRH) at the magnetic mirror device Gas Dynamic Trap (GDT, Budker Institute, Novosibirsk) are discussed. This based on two 400 kW/54.5 GHz gyrotrons is aimed increasing temperature up to range 250–350 eV improved energy confinement hot ions. The key physical issue GDT field topology that conventional ECRH geometries not accessible. proposed solution peculiar effect radiation trapping in inhomogeneous magnetized plasma....
The paper describes experiment devoted to the field reversal in a mirror trap with neutral beam injection, which is planned for realization now Budker Institute. technical details of experimental device and expected plasma parameters are discussed. In accordance theoretical predictions, facility (neutral current − 240 atom A, energy neutrals 15 keV, magnetic 0.2 T, electron temperature 50 eV target density ∼1013−1014 cm−3) be sufficient case, if anomalous ion losses not essential.
The Budker Institute of Nuclear Physics in worldwide collaboration has developed a project 14 MeV neutron source for fusion material studies and other applications. projected the plasma type is based on gas dynamic trap (GDT), which special magnetic mirror system confinement. Essential progress parameters been achieved recent experiments at GDT facility Institute, hydrogen (deuterium) prototype source. Stable confinement hot-ion plasmas with relative pressure exceeding 0.5 was demonstrated....
The work represents a next step in studies of longitudinal energy losses from linear magnetic plasma confinement devices. paper describes the experimental technique that has been developed and used to measure absolute values particle density fluxes an open mirror trap. Using this technique, it was possible account for secondary electron emission coefficient plasma-facing end plate, perform comparison with existing theory traps. It is shown average transported by ion-electron pair leaving...
Studies of the relaxation and confinement hot anisotropic ions are considered to be key elements gas dynamic trap (GDT) experimental research programme. The method study described consists essentially in comparison measured ion parameters with those predicted by computer simulations. To realize this approach a set diagnostics for measurements local global fast has been developed. In particular, includes measure energy angular distribution functions. For numerical studies dynamics Monte Carlo...
The status of the experiments on axially symmetric magnetic mirror device gas dynamic trap (GDT) is discussed. plasma has been heated by skewed injection 20-keV, 3.5-MW, 5-ms deuterium/hydrogen neutral beams at center device, which produces anisotropic fast ions. Neither enhanced transverse losses nor anomalies in ion scattering and slowing down were observed. Extension beam pulse duration from 1 to 5 ms resulted an increase on-axis beta (ratio pressure field pressure) 0.4 turning points...
The axially symmetric magnetic mirror device gas-dynamic trap (GDT, Budker Institute, Novosibirsk) has recently demonstrated a tangible increase in plasma electron temperature. According to laser scattering, value of 0.4 keV been achieved (a twofold increase). In addition standard machine operation, utilizing 5 MW neutral beam injection, newly installed cyclotron resonance heating (ECRH) system was employed (54.5 GHz, MW). reported progress temperature, along with previous experiments, which...