A5062290365- Magnetic confinement fusion research
- Fusion materials and technologies
- Laser-Plasma Interactions and Diagnostics
- Superconducting Materials and Applications
- Ionosphere and magnetosphere dynamics
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Geomagnetism and Paleomagnetism Studies
- Atomic and Subatomic Physics Research
- Solar and Space Plasma Dynamics
- Plasma Diagnostics and Applications
- Distributed and Parallel Computing Systems
- Thin-Film Transistor Technologies
- Dust and Plasma Wave Phenomena
- Advancements in Photolithography Techniques
- Atomic and Molecular Physics
- Electric Power Systems and Control
- Nuclear and radioactivity studies
- Nuclear reactor physics and engineering
- Mass Spectrometry Techniques and Applications
- High-pressure geophysics and materials
- Cyclone Separators and Fluid Dynamics
- Nuclear Materials and Properties
- Laser-induced spectroscopy and plasma
Kurchatov Institute
2011-2025
Russian Federal Space Agency
2014-2015
Dollezhal Research and Development Institute of Power Engineering
2013
Polytechnic University of Turin
2004
Joint European Torus
1996-1997
Politecnico di Milano
1996
Institute of Atomic Energy
1990
This paper considers a fast track to non-energy applications of nuclear fusion that is associated with the ‘fusion for neutrons’ (F4N) paradigm. Being useful product accompanying energy, neutrons are more valuable than energy released in DT reactions and they urgently needed research purposes develop validate modern technologies. In near future neutron yield devices will become significantly larger fission accelerator sources. describes compact tokamak source based on small spherical...
Evidence for excitation of suprathermal electrons ( E(gamma) approximately 20-100 keV) during magnetic reconnection in the T-10 tokamak is presented through analysis x-ray measurements with enhanced spatial and time resolution. A toroidally viewing imaging system a fast hard detector placed inside vessel allow identification bursts nonthermal radiation around X points m = 1 2 islands sawtooth crash prior to energy quench at density limit disruption.
Full tungsten poloidal and mushroom limiters were tested in series of experiments with disruptions the T-10 tokamak. Significant melting, formation small craters erosion limiter have been observed after ∼400 discharges disruption. A theoretical description at disruption tokamak plasma is presented. The proposed model was verified by comparison experimental observations T-10. results are used for prediction ITER divertor.
Transition to an all-metal wall was realized on T-10 by replacement of graphite limiters with tungsten ones. Light impurity levels remained high and W accumulation in the plasma core revealed. A movable lithium (Li) limiter added investigate possibility limitation light plasma. For first time, tokamak results protection Li were obtained OH ECRH regimes. After lithization density dropped more than order magnitude, while influx into decreased 2–4 times. Drastic drops impurities observed...
Repetitive bursts of nonthermal (Eγ ~ 15 − 150 keV) x-ray radiation are observed during the plasma current decay phase density limit disruptions in T-10 tokamak. The repetition rate correlates with rate. Analysis indicates that phenomena can be connected electrons initiated abrupt growth magnetohydrodynamic (MHD) modes series minor disruptions. Application electron cyclotron waves post energy quench allows control bursting MHD and prevention beam formation. Phenomenological modelling beams...
A soft X-ray imaging system consisting of three arrays silicon surface barrier diodes is applied to the tomographic analysis internal plasma perturbations in T-l0 tokamak (R0=1.5 m, a=0.32 m). It found that density limit disruptions a with high safety factor at edge (qa=3.5-4.5) are associated joint rotation m=2, n=1 and m=1, modes, overlapping energy quench stage. Electron cyclotron resonance heating used prevent or recover stable operation discharge after
Poloidal asymmetry and radial correlation lengths of turbulence were investigated in T-10 at low field side high by reflectometry. Correlation plasma confinement with the type was observed. Improvements heavy ion beam probe diagnostic enabled us to measure potential during electron cyclotron resonance heating (ECRH) a wide range positions operational regimes. The appeared rotate close E × B velocity. concept internal transport barrier (e-ITB) formation low-order rational surfaces under...
The plasma stability and confinement have been investigated through control of the safety factor profile q(r) by electron cyclotron current drive in T-10 tokamak. regimes with dq/dr≅0 dq/dr<0 core were obtained. Various types MHD activity observed: ordinary sawtooth, saturated humpbacks, hills etc. It was shown that when minimal value qmin increases from <1 to = 2 becomes strongly unstable due corresponding or passes steady-state improved mode. latter is realized internal transport barrier...
Due to the development of ITER project, requirements technical parameters systems were more precisely and practically determined be at higher levels. The essential increase system characteristics happened recently. A number prototypes manufactured tests carried out. results manufacture 25 systems, subject Russian Federation's obligations in are described.
Arc discharges are considered as a possible mechanism determining transition from relatively slow growth of the magnetohydrodynamic (MHD) perturbations to thermal quench (minor disruption) and subsequent major disruption with current collapse in T-10 tokamak. The effect arc is evaluated using analysis fast-scale (0.2–1.5 MHz) electromagnetic oscillations measured by movable magnetic electric probes located near plasma boundary at multiple positions inside vacuum vessel postoperational...
Results of the electron cyclotron current drive experiment at second harmonic resonance on T-10 tokamak are presented. High frequency (HF) power up to 1.2 MW was launched from low field side. A maximum driven 35 kA and efficiency ηCD = 0.05 A/W an temperature Tc(O) 4 keV a density nc(0) 1 × 1013 cm-3 were obtained. For HF power, less than predicted by linear theory unless effect elliptical polarization non-perpendicular injection is considered, in which case close theoretical value. The...
Bursts of the x-ray and electron cyclotron emission are observed in tokamaks during sawteeth disruption instability. Analysis tangential view emissivity T-10 tokamak has indicated that bursts connected with nonthermal electrons (ERA ∼ 15–150 keV) localized around magnetic islands. Dynamics compared phenomenologically similar experiments TCV (Klimanov I et al 2005 Rev. Sci. Instrum. 76 093504) DIII-D (Heidbrink W 1999 Nucl. Fusion 39 1369). field evolution a sawtooth crash can be reconnection...
New magnetic probe system is installed on the T-10 tokamak to investigate fast-scale perturbations (f up 2 MHz). The based vertical and horizontal probes made by nickel wire in glass enamel isolation (effective area 20–250 cm2) separated from support structures ceramic spacers (5–10 mm). mounted top of movable rode allowing positioning along axis close plasma boundary at low field side torus. Additional allows rotation around pulse-to-pulse basis. are directly connected analog-to-digital...
Various types of nonthermal x-ray bursts are observed in the central part plasma with high density T-10 tokamak [Alikaev et al., Plasma Phys. Controlled Fusion 30, 381 (1988)] use a tangential view imaging system. In contrast “classical” hard produced during interaction runaway electron beams (Eγ∼0.5–3 MeV) wall, “internal” associated forward bremsstrahlung emission suprathermal electrons (Eγ∼25–100 keV) from area around q=1 and q=2 magnetic surfaces. It is speculated that localized can be...
A diagnostic technique based on sets of CdTe detectors is used for measurements spatial localization and temporal evolution the nonthermal (Eγ up to 150 keV) x-ray emission in plasma with high density T-10 tokamak. Various types bursts observed during limit disruption appear as a result forward bremsstrahlung due electron interaction residual well nonuniform runaway electrons plasma-facing constructions.
The effect of the q(r) profile on transport barrier formation has been investigated in T-10 tokamak using rapid current ramp-up with electron cyclotron resonance heating (ECRH). enhanced core confinement (formation internal (ITB)) arises earlier than additional penetrates region. It is suggested that this process takes place due to decrease magnetic surface density region rational q = 2 βp decrease, which equivalent dq/dr near surface. At various q-profiles, and external barriers were...
The study of two types T-10 regime-a regime with low impurity confinement (S regime) and a enhanced (B has been continued in deuterium discharges ne approximately necrit. In the present experiments transitions from S to B regimes is obtained by method gas puff cut-off. Detailed investigations profile evolution Te(r), Ti(r), ne(r) carbon density nc showed, that greatly changes after cut-off, while Te(r) Ti(r) remain practically unchanged at central zone plasma. This indicates possibility...
Non-thermal x-ray radiation (Eγ up to 150 keV) is measured in the T-10 tokamaks during disruption instability using two sets of CdTe detectors (10 vertical and 7 horizontal view detectors). Special narrow cupper tubes collimators with lead screening integrated amplifiers inside metallic containers provides enhanced spatial resolution system (r ∼ 3 cm) assures protection from parasitic hard 1.5 MeV) electromagnetic loads disruption. Spatial localization nonthermal emissivity reconstructed...
Experiments in the T-10 tokamak [Alikaev et al., Plasma Phys. Controlled Fusion 30, 381 (1988)] have demonstrated possibility of control plasma current and prevention formation non-thermal (Eγ &gt; 150 keV) electron beams after an energy quench at density limit disruption using cyclotron heating (ECRH) controlled operation Ohmic power supply system. Quasi-stable with repetitive sawtooth oscillations can be restored high auxiliary Pec 2–5 Poh. Optimal conditions discharge recovery are...
The ITER Vacuum Vessel (VV) features upper, equatorial and lower ports. Although the port design has been overall completed in past, of some remaining interfaces was still progress finalized now. As construction phase started, procurement VV ports launched. upper will be procured by Russian Federation DA, while Korean DA. main industrial suppliers were selected development manufacturing is Since classified at nuclear level N2, manufacture its components are to compliant with French code...
Small-scale quasicoherent oscillations of the x-ray emissivity and magnetic field perturbations are observed in T-10 tokamak during abrupt growth $m=2$, $n=1$ magnetohydrodynamic modes at density limit disruption. Analysis indicates a possible link between small-scale nonthermal electron beams induced around $X$ points island reconnection lines disruption instability.