A5020508342- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Quantum Mechanics and Applications
- Laser Design and Applications
- Geophysics and Sensor Technology
- Laser-induced spectroscopy and plasma
- Aerodynamics and Acoustics in Jet Flows
- Atomic and Molecular Physics
- Advanced X-ray Imaging Techniques
- Stochastic processes and financial applications
- Fluid Dynamics and Turbulent Flows
- Advanced Thermodynamics and Statistical Mechanics
- Radiation Therapy and Dosimetry
- High-pressure geophysics and materials
- Anesthesia and Sedative Agents
- Semiconductor Lasers and Optical Devices
- Plasma and Flow Control in Aerodynamics
- Particle Detector Development and Performance
- Random lasers and scattering media
- AI in cancer detection
- Rocket and propulsion systems research
- Nuclear reactor physics and engineering
- Aerosol Filtration and Electrostatic Precipitation
- Statistical Mechanics and Entropy
- Mechatronics Education and Applications
Saga University
1988-2024
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2015-2021
Extreme Light Infrastructure - Nuclear Physics
2015-2021
Osaka University
2011-2016
Institute for Laser Technology
2014
Fujikura (United States)
1991
Fujikura (Japan)
1987-1989
The European Strategy Forum on Research Infrastructures (ESFRI) has selected in 2006 a proposal based ultra-intense laser fields with intensities reaching up to 1022-1023 W cm-2 called 'ELI' for Extreme Light Infrastructure. construction of large-scale laser-centred, distributed pan-European research infrastructure, involving beyond the state-of-the-art ultra-short and technologies, received approval funding 2011-2012. three pillars ELI facility are being built Czech Republic, Hungary...
We briefly describe in this paper some of the proposed experiments for E7 and E4 experimental areas at ELI-NP. Our tackle fundamental problems physics, taking advantage unique configuration (high intensity laser plus gamma/electron beam) ELI-NP Magurele, Romania. discuss gradual approach from a complexity point view, "commissioning" or "day 1" to ones needing key results previously R&D advances fields such as wakefield acceleration electrons, extremely high vacuum synchronization tens...
The intensity of the ultra-short pulse lasers has reached 1022 W/cm2 owing to advancements laser technology. When motion an electron becomes relativistic, bremsstrahlung accompanies it. energy from this corresponds loss electron; therefore, deviates case without radiation. radiation behaves something like resistance. This effect called “radiation reaction” or damping” and force converted is named reaction force” “damping force”. equation with known as Lorentz-Abraham-Dirac (LAD) equation,...
From the development of electron theory by H. A. Lorentz in 1906, many authors have tried to reformulate this model. P. M. Dirac derived relativistic-classical model 1938, which is now called Lorentz–Abraham–Dirac But has big difficulty runaway solution. Recently, equation become important for ultra-intense laser–electron (plasma) interactions. For simulations research field, it desirable stabilize radiation reaction. In paper, we will discuss ability reaction with inclusion vacuum polarization.
In the near future, intensity of ultra-short pulse laser will reach to 1022 W/cm2 owe advancements technologies. The motion electron becomes relativism. If is laid in such strong field, effect “radiation reaction” not negligible for motion. general, if this describe as Lorentz-Abraham-Dirac equation, there a “run-away” solution. A lot researchers have tried transform equation avoiding run-away. As one solution problem, we succeeded discovery new that takes place equation. I'll show validity...
Abstract A classical model of radiation reaction for the betatron oscillation an electron in a plasma wakefield accelerator is presented. The maximum energy due to longitudinal found, and damping both transverse effects analyzed. Both theoretical numerical solutions are shown with good agreements. regime that quantum takes effect also discussed. This important designing future based super accelerators or colliders.
Since the development of a radiating electron model by Dirac in 1938 [P. A. M. Dirac, Proc. R. Soc. Lond. A 167, 148 (1938)], many authors have tried to reformulate this so-called “radiation reaction”. Recently, effect has become important ultra-intense laser–electron (plasma) interactions. In our recent research, we found way stabilizing radiation reaction quantum electrodynamics (QED) vacuum fluctuation [K Seto et al., Prog. Theor. Exp. Phys. 2014, 043A01 (2014); K. Seto, 2015, 023A01...
From the development of electron theory by H. A. Lorentz in 1906, many authors have tried to reformulate this model named "radiation reaction". P. M. Dirac derived relativistic-classical 1938, which is now called Lorentz-Abraham-Dirac model. But has big difficulty run-away solution. Recently, equation become important for ultra-intense laser-electron (plasma) interactions. Therefore, it desirable stabilize radiation reaction estimations. Via my recent research, I found a stabilized quantum...
In the near future, intensity of ultra-short pulse laser will reach to 1022 W/cm2. When an electron is irradiated by this laser, electron's behavior relativistic with significant bremsstrahlung. This radiation from regarded as energy loss electron. Therefore, motion changes because kinetic changing. effect on charged particle self-interaction, called “radiation reaction” or damping”. For reason, reaction appears in interactions whose becomes larger than classical theory, it described...
This paper describes the Gamma PolariCalorimeter, an instrument that is being developed for measuring both energy and polarization degree of gamma beams in range 100 MeV to 2 GeV at Extreme Light Infrastructure - Nuclear Physics (ELI-NP) facility. The designed performing these measurements using dependent cross-section pair production process. electron-positron pair's kinematic properties are measured after tracked a magnetic field thin pixelated silicon sensors, thus enabling reconstruction...
We propose stochastic ray tracing for laser beam propagation in Fresnel diffraction to find the duality between wave and representations. transform from Maxwell equations Schrödinger equation a monochromatic slowly varying envelope approximation. The method interprets this as process, of an analogy Nelson's mechanics. It can illustrate paths wavefront optical beam. This includes effects naturally. show its general theoretical construction numerical tests Gaussian with diffraction, that...
An underexpanded jet issued from a convergent nozzle generates high frequency noise that is called screech.The present paper shows the measurement of sound source region by using intensity technique.In experiment.the pressure ratio was kept constant and distribution component investigated.Furthermore.we applied propagation model to obtained region.Then, reproduced compared it with measured one.A reasonable agreement obtained.Without directivity model, predicted result did not agree meas
Radiation reaction is one of the remaining big problems in theoretical physics. When an electron has high energy, radiation from this might become significant. Since regime involves laser intensities over 1022 W/cm2, we need to consider it under next generation laser-electron interactions. Moreover, considered represent model classical Therefore, research into ultrahigh intense laser-high energy interactions potential take us center and essence However, Lorentz-Abraham-Dirac theory, which...
The intensity of ultra-short pulse lasers has reached 1022 W/cm2 owing to the advancements in laser technology. large radiation from electron behaves something like resistance this ultrarelativistic laser–electron interaction. This effect is called “radiation reaction”. equation motion with reaction known as Lorentz–Abraham–Dirac equation; however, does not incorporate spin property. In plasmas, classical physics descriptions are preferred for simulations. paper discusses how describe a...
The image transmission characteristics of shorter silica based imagefiber has been investigated. It found that the quality strongly depends on length and suitable structure to fiber exists for imagefiber. And as a result, it clarified most part unwanted waves can be removed by twisting or bending
After the development of a radiating electron model by P. A. M. Dirac in 1938, many authors have tried to reformulate this so-called radiation reaction. Recently, effect has become important ultra-intense laser-electron (plasma) interactions. In our recent research, we found stabilization method reaction QED vacuum fluctuation [PTEP 2014, 043A01 (2014), PTEP 2015, 023A01 (2015)]. On other hand, modification radiated field highly intense incoming laser fields should be taken into account when...
With the progress of ultraintense short pulse laser technologies, maximum intensity lasers has reached order 1022W/cm2. Now, several institutes are aiming at higher intensities over 1024∼W/cm2. It is expected that these can investigate regime ultra-intense field effects like electron-positron pair creation and annihilation, high-intense fields enters into non-linear QED regime. However, when an electron interacts with 1022W/cm2, it been predicted radiation reaction effect becomes...
Radiation reaction has been investigated traditionally in classical dynamics and recently non-linear QED for high-intensity field physics by lasers. The non-linearity of is predicted as the coupling between a highly energetic electron its radiation. However, applicable range external fields previous method Furry picture just case plane wave. In this Volume II, we aim generalization using stochastic scalar model introduced I. We discuss formulation radiation acting on show origin correction...
Tracking a real trajectory of quantum particle still has been treated as the interpretation problem. It shall be expressed by Brownian (stochastic) motion suggested E. Nelson, however, well-defined mechanism field generation from stochastic hasn't proposed yet. For improvement this, I propose extension Nelson's dynamics, for describing relativistic scalar electron with its radiation equivalent to Klein-Gordon and system.