М. П. Петров
A5073340003- Magnetic confinement fusion research
- Photorefractive and Nonlinear Optics
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Fusion materials and technologies
- Nuclear Physics and Applications
- Optical and Acousto-Optic Technologies
- Particle accelerators and beam dynamics
- Ionosphere and magnetosphere dynamics
- Semiconductor Lasers and Optical Devices
- Nuclear reactor physics and engineering
- Laser-Plasma Interactions and Diagnostics
- Optical Network Technologies
- Atomic and Subatomic Physics Research
- Solid-state spectroscopy and crystallography
- Superconducting Materials and Applications
- Plasma Diagnostics and Applications
- Crystallography and Radiation Phenomena
- Advanced Fiber Optic Sensors
- Atomic and Molecular Physics
- Mechanical and Optical Resonators
- Spectroscopy and Quantum Chemical Studies
- Photonic Crystal and Fiber Optics
- Diamond and Carbon-based Materials Research
- Advanced NMR Techniques and Applications
Ioffe Institute
2009-2024
St Petersburg University
2012-2024
Physico-Technical Institute
2003-2024
Children's Scientific and Clinical Center for Infectious Diseases of the Federal Medical and Biological Agency
2024
Center for Children
2024
Tufts University
2023-2024
Institute of Philosophy
2023
Saint Petersburg State Electrotechnical University
2022
Budker Institute of Nuclear Physics
2020
Physical and Technical Institute
1992-2015
This paper gives a thorough treatment of new effect non-steady-state photo-electromotive-force (emf). The consists an alternating electric current arising in short-circuited bulk sample photoconductor illuminated by vibrating sinusoidal pattern. As detailed theoretical analysis shows, the frequency transfer function is identical with that differentiating RC circuit having time constant equal to characteristic space-charge grating formation within volume τsc. For high excitation frequencies...
First Page
Peak fusion power production of 6.2\ifmmode\pm\else\textpm\fi{}0.4 MW has been achieved in TFTR plasmas heated by deuterium and tritium neutral beams at a total 29.5 MW. These have an inferred central alpha particle density 1.2\ifmmode\times\else\texttimes\fi{}${10}^{17}$ ${\mathrm{m}}^{\mathrm{\ensuremath{-}}3}$ without the appearance either disruptive magnetohydrodynamics events or detectable changes Alfv\'en wave activity. The measured loss rate energetic particles agreed with...
The targeted plasma parameters of the compact spherical tokamak (ST) Globus-M have basically been achieved. reasons that prevent further extension operating space are discussed. operational limits together with an understanding limiting form basis for defining design requirements next-step, Globus-M2. recent experimental and theoretical results achieved discussed, problems research programme summarized finally, Globus-M2 presented. magnetic field current in will be increased to 1 T 0.5 MA,...
Alpha-particle-driven toroidal Alfvén eigenmodes (TAEs) have been observed for the first time in deuterium-tritium (D-T) plasmas on tokamak fusion test reactor (TFTR). These modes are 100–200 ms following end of neutral beam injection with reduced central magnetic shear and elevated safety factor [q0>1]. Mode activity is localized to region discharge r/a<0.5 fluctuation level B̃⊥/B∥∼10−5 mode numbers range n=2–4, consistent theoretical calculations α-TAE stability TFTR.Received 11 November...
The Tokamak Fusion Test Reactor (TFTR) (R. J. Hawryluk, to be published in Rev. Mod. Phys.) experiments on high-temperature plasmas, that culminated the study of deuterium–tritium D–T plasmas containing significant populations energetic alpha particles, spanned over two decades from conception completion. During design TFTR, key physics issues were magnetohydrodynamic (MHD) equilibrium and stability, plasma energy transport, impurity effects, reactivity. Energetic particle was given less...
The Tomamak Fusion Test reactor has performed initial high-power experiments with the plasma fueled nominally equal densities of deuterium and tritium. Compared to pure plasmas, energy stored in electron ions increased by \ensuremath{\sim}20%. These increases indicate improvements confinement associated use tritium possibly heating electrons \ensuremath{\alpha} particles created D-T fusion reactions.
This Letter reports the first measurements of fast confined $\ensuremath{\alpha}$-particle energy distribution in a fusion plasma. The pellet charge exchange technique shows generated $\ensuremath{\alpha}$'s core Tokamak Fusion Test Reactor plasma slow down classically, and appear to be well confined. Preliminary indications are that stochastic ripple effects responsible for steepening outside $(r/a\ensuremath{\gtrsim}0.35)$. Sawteeth mixing is suggested data during post-beam-heating decay.
An overview of the developments postcirca 1980s in instrumentation and application charge exchange neutral particle diagnostics on magnetic fusion energy experiments is presented. First, spectrometers that employ only electric fields hence provide ion resolution but not mass are discussed. Next, use various geometrical combinations both to resolutions reviewed. Finally, based utilization time-of-flight techniques
It has been recently demonstrated that atomic force microscopy (AFM) allows for the rather precise identification of malignancy in bladder and cervical cells. Furthermore, an example human colorectal epithelial cells imaged AFM Ringing mode ability to distinguish with varying cancer aggressiveness help machine learning (ML). The previously used ML methods analyzed entire cell image. problem such approach is lack information about which features surface are associated a high degree Here we...
Results from recent DT experiments on TFTR to measure the energy distribution and radial density profile of fast confined alphas with use Li pellets neutral particle analysis are presented. When a pellet is injected into plasma, toroidally extended ablation cloud formed. A small fraction fusion incident converted helium neutrals as result electron capture processes. The escaping energetic analysed detected by analyser. Radially resolved spectra trapped in 0.5-2 MeV range alpha profiles...
We report the optical detection of mechanical deformation a macroscopic object induced by Casimir force. An adaptive holographic interferometer based on photorefractive BaTiO3:Co crystal was used to measure periodical nonlinear deformations thin pellicle caused an oscillating A reasonable agreement between experimental and calculated values first second harmonics force oscillations has been obtained.
Experiments with plasmas having nearly equal concentrations of deuterium and tritium have been carried out on TFTR. To date (September 1995), the maximum fusion power has 10.7 MW, using 39.5 MW neutral beam heating, in a supershot discharge 6.7 high beta P following current ramp-down. The density core plasma reached 2.8 MW/m3, exceeding that expected International Thermonuclear Experimental Reactor (ITER). energy confinement time tau E is observed to increase DT, relative D plasmas, by 20%...
Experiments and simulations to achieve high values of plasma parameters at the Globus-M spherical tokamak (ST) moderate absolute auxiliary heating power (up 0.8 MW) specific 2–3 MW m −3 ) are described. Important distinguishing features low edge safety factor range, which is unusual for STs, 2.7 < q 5 small plasma–outer wall space (3–5 cm). High ion efficiency with neutral beam injection (NBI) was demonstrated. Results numerical simulation fast trajectories described generation during NBI...