A5031404487- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Magnetic confinement fusion research
- Laser-Matter Interactions and Applications
- Advanced Fiber Laser Technologies
- Nonlinear Photonic Systems
- Superconducting Materials and Applications
- Laser-Plasma Interactions and Diagnostics
- Quantum optics and atomic interactions
- Photonic Crystal and Fiber Optics
- Atomic and Subatomic Physics Research
- Pulsed Power Technology Applications
- Ionosphere and magnetosphere dynamics
- Particle Accelerators and Free-Electron Lasers
- Cold Atom Physics and Bose-Einstein Condensates
- Plasma Diagnostics and Applications
- Terahertz technology and applications
- Random Matrices and Applications
- Optical Network Technologies
- Laser Design and Applications
- Nonlinear Dynamics and Pattern Formation
- Graph theory and applications
- Photorefractive and Nonlinear Optics
- Laser-induced spectroscopy and plasma
- Differential Equations and Numerical Methods
Institute of Applied Physics
2015-2024
Russian Academy of Sciences
2002-2023
Yaroslav-the-Wise Novgorod State University
2015-2020
Saratov State University
2018
N. I. Lobachevsky State University of Nizhny Novgorod
2013-2015
Karlsruhe Institute of Technology
2011
Fusion for Energy
2011
University of Alberta
1999-2008
University of Stuttgart
2003-2005
Max Planck Institute for Plasma Physics
2004
Abstract The eXawatt Center for Extreme Light Studies project aimed to create a large scientific infrastructure based on lasers with giant peak power. relies the significant progress achieved in last decade. planned will incorporate unique light source pulse power of 600 PW using optical parametric chirped amplification large-aperture KD 2 PO 4 , deuterated potassium dihydrogen phosphate crystals. interaction such laser radiation matter represents completely new fundamental physics. direct...
The last decade has contributed to the rapid progress in gyrotron development. Megawatt-class, continuous wave gyrotrons are employed as high-power millimeter (mm)-wave sources for electron cyclotron heating (ECH) and current drive tokamaks stellarators. development pushes ECH from a minor major method. Also based technological complexes successfully applied resonance ion sources, microwave ceramic sintering diamond disk production. paper describes main features of high frequency gyrotrons....
The possibility and prospects of extreme ultraviolet (UV) point-like source development are discussed in the present paper. UV is based on discharge sustained by powerful gyrotron radiation terahertz (THz) frequency band non-uniform gas flow injected into vacuum volume through a nozzle with diameter less than 1 mm. Recent developments THz-band gyrotrons appropriate power level made such discharges possible. First experimental results plasma creation 100 kW 0.67 THz presented. localization...
We develop a classical model of the parametric effect electromagnetically induced transparency (EIT) within line resonance absorption an electromagnetic wave in medium---an initially discovered for quantum three-level system. On basis this model, EIT waves at frequencies electron-cyclotron cold plasma is considered. Similar to analogous scheme, window characterized by group deceleration reference wave.
The paper presents the latest development achievements in Russian institutions IAP/GYCOM of MW power level gyrotrons for fusion installations.
Currently, a new multi-frequency ECRH system is under construction at the ASDEX Upgrade tokamak experiment. This employs, for first time in fusion device, gyrotrons, step-tunable range 105–140 GHz. The two working 105 and 140 GHz, were installed tested. matching optics unit includes set of phase correcting mirrors each frequency as well pair broadband polarizer mirrors. transmission line consists non-evacuated corrugated HE 11 waveguides with an inner diameter (ID) 87 mm has total length...
Abstract It was shown experimentally that for a 65-fs 17-J pulse, the effect of filamentation instability, also known as small-scale self-focusing, is much weaker than predicted by stationary and nonstationary theoretical models high B-integral values. Although this discrepancy has been left unexplained at moment, in practice no signs may allow breakthrough nonlinear pulse post-compression laser energy.
The results of experiments aimed at the study discharge in a focused beam terahertz waves argon under near-atmospheric pressures are presented. range electric fields and gas pressures, which breakdown occurs, is determined. glow dynamics showed that starts maximum wave field its front moved towards radiation with speed about 105 cm/s into region being significantly weaker than value. Measurements ratio transmission through allow one to conclude density plasma produced exceeds 1015 cm−3. Some...
We demonstrate selective excitation and coherent amplification in the multicore fiber of out-of-phase supermode that has equal intensities but interleaved 0/π phases neighboring cores. The is beneficial due to its stability at arbitrary high powers, whereas fundamental becomes unstable relatively powers. fabricated a double-clad all solid silica with six highly Yb-doped coupled cores arranged ring structure. obtained 50 picosecond chirped pulses up ~1 μJ energy measured content mode >80%....
This presentation reviews recent progress of Russian physicists in developing electronic devices the gyroresonance type, which are so far most advanced sources millimeter microwaves. It deals with concept gyrotron as a device operating at higher volume resonator modes built-in quasioptical converter output radiation into wave beam. That made it possible to create comparatively simple and reliable long-pulse quasicontinuous power level 0.5 MW frequency band 30–160 GHz. Analysis principal...
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Progress in the worldwide development of high-power gyrotrons for magnetic confinement fusion plasma applications is described. After technology breakthroughs research on gyrotron components 1990s, significant progress has been achieved last decade, particular, field long-pulse and continuous wave (CW) a wide range frequencies. At present, 1 MW-class CW very successful; these are applicable self-ignition experiments plasmas their tokamak ITER, stellarator Wendelstein 7-X (W7-X) EC H&CD...
The features of the self-action a wave field in small-sized optical system consisting $2N$ identical light guides, which are disposed equidistantly along ring, and an isolated fiber center studied analytically numerically. Stable exact solutions found for intense beams such system, allowing long-distance coherent transport radiation set fibers. total beam power this case can exceed several times critical self-focusing continuous medium. This is clearly manifested out-of-phase spatial...
The coherent propagation and amplification of high-power laser radiation in a multicore fiber consisting square array weakly bound cores are studied. Exact stable analytical solutions found for the out-of-phase mode, which describes wave beams such fibers. results confirmed by direct numerical simulation equation. stability conditions mode active medium found.
It is shown that mechanical vibration (acoustical oscillation) of a solid medium along the propagation multifrequency laser radiation enables one to control resonant absorption. There exists an optimal spectral structure incident field dependent on amplitude as well number and intensity frequency components provides full transparency. A mechanism transparency discussed. Transparency this kind appear also via adiabatic modulation atomic transition by external microwave field.
In Russia gyrotrons are developed in cooperation of three institutions: Institute Applied Physics, Russian Academy Sciences, Nizhny Novgorod, Industrial company GYCOM Ltd, and Kurchatov Institute, Moscow. During last year several new were designed tested by gyrotron team. Main efforts spent for elaboration 170GHz/1MW/50%/CW ITER project multi-frequency gyrotrons. There also other delivered to tokamaks stellarators.
Nonlinear spatiotemporal dynamics of femtosecond pulses in a hexagonal seven-core silica fiber pumped by sub-μJ 370 fs Er:fiber chirped pulse amplification (CPA) system were studied. shaping and compression the central core pedestal coupling to outer cores directly measured frequency-resolved optical gating. Further spectrally broadened multicore down 53 was demonstrated. Two orders magnitude contrast enhancement after observed.