A5005386490- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Electrostatic Discharge in Electronics
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Lightning and Electromagnetic Phenomena
- Seismic Waves and Analysis
- Semiconductor materials and devices
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Pulsed Power Technology Applications
- Integrated Circuits and Semiconductor Failure Analysis
- DNA Repair Mechanisms
- Glycosylation and Glycoproteins Research
- Particle accelerators and beam dynamics
- Laser-induced spectroscopy and plasma
- Bacterial Genetics and Biotechnology
- Chemical Synthesis and Analysis
- Animal Genetics and Reproduction
- Analytical Chemistry and Chromatography
- Gyrotron and Vacuum Electronics Research
- Metal and Thin Film Mechanics
- Advancements in Semiconductor Devices and Circuit Design
- Fusion materials and technologies
Kyoto University
1984-2021
University of Iowa
2018
Research Institute for Sustainable Humanosphere
2014-2017
Institute for Sustainable Development
2016
Kobe University
2013
University of Tsukuba
2005-2006
National Institute for Fusion Science
1991-1996
Sasaki Institute
1996
Asahikawa Medical College Hospital
1995
Tokyo University of Science
1991-1995
Abstract We perform test particle simulations of energetic electrons interacting with whistler mode chorus emissions. compute trajectories a large number forming delta function the same energy and equatorial pitch angle. The are launched at different locations along magnetic field line timings respect to pair emissions generated equator. follow evolution obtain distribution in angle, which is numerical Green's for one cycle wave‐particle interaction. functions range 10 keV–6 MeV all angles...
Abstract By performing test particle simulations of relativistic electrons scattered by electromagnetic ion cyclotron (EMIC) rising tone emissions, we find a nonlinear scattering process named SLPA (Scattering at Low Pitch Angle) totally different from the wave trapping. The trapping, occurring for high pitch angles away loss cone, scatters some resonant to lower angles, and fraction is further transported into cone after being released as well trapping can work in any cases with proton band...
Abstract We perform test particle simulations of relativistic electrons interacting with electromagnetic ion cyclotron (EMIC)‐triggered emissions in the plasmasphere. EMIC‐triggered are generated by energetic protons injected into inner magnetosphere. characterized large wave amplitudes, rising‐tone frequencies, and coherent left‐hand circularly polarized waves. study trajectories radiation belt drifting eastward longitudinally distributed emissions. Some trapped potentials efficiently...
Abstract Using results of test particle simulations electrons interacting with whistler mode chorus emissions, we numerically obtain Green's functions to model evolution the electron distribution function after all possible interactions waves. In both wave models and without subpackets, undergoing cyclotron resonance waves are efficiently accelerated by nonlinear trapping. Since strong modulation amplitude (in case subpackets) affects dynamics resonant electrons, detrapped from potential or...
Abstract Nonlinear whistler mode wave‐particle interaction is one of the processes to generate relativistic electrons in Earth's outer radiation belt. Applying test particle simulations with a pair chorus emissions, we traced large number various initial conditions along an magnetic field line build set Green's functions for analyzing evolution electron distribution under emissions. Employing convolution integral functions, tracked formation fluxes from injected energetic through consecutive...
Experiments aiming at 'day long operation high performance' have been carried out in TRIAM-1M. The record value of the discharge duration was updated to 5 h and 16 min. Steady-state tokamak is studied under localized plasma wall interaction conditions. distributions heat load, particle recycling flux impurity source are investigated understand co-deposition pumping. formation sustainment an internal transport barrier (ITB) enhanced current drive mode has by controlling lower hybrid driven...
Abstract Eleven single strand initiation sequences (ssi) were isolated from various plasmid genomes using a plaque-morphology assay. Out of seven ssi that require dnaB and dnaC functions for replication in crude vitro system, six use phi X174 type priming mechanism, primosome is assembled at these the purified proteins, n'(priA), n(priB), n(priC), dnaT, dnaB, dnaC, primase. The same potentiate dATPase activity n' protein, thus represent new protein recognition (n'-pas). Based on sequence...
Abstract Energetic electron acceleration and precipitation in the Earth's outer radiation belt are highly associated with wave‐particle interactions between whistler mode chorus waves electrons. We perform test particle simulations to investigate electrons interacting parallel oblique emissions maximum amplitude 2.1 nT 370 pT at L = 4.5. build up a database of Green's functions, which treated as results input one emission. The loss process caused by consecutive traced applying convolution...
A nonmammalian test system for germ-cell mutagenesis has been developed by using the Japanese medaka fish. We describe a detecting DNA alterations in F1 progeny descended from gamma-irradiated male that uses an arbitrarily primed polymerase chain reaction and fingerprinting. combination of these two methods some advantages screening changes genomic individual because this detection can (i) screen mutational events before embryos with dominant lethal mutations are eliminated during...
It is a common view that ballistic transport enhanced due to channel length scaling because of decreased scattering number. In this study, based on Monte Carlo (MC) simulation technique, we have successfully extracted quasi-ballistic parameters such as backscattering coefficient, by carefully monitoring particle trajectories around the potential bottleneck point. We found contrary expectations, in ultra-scaled double-gate (DG) MOSFETs not mainly intensified surface roughness (SR) if reduces...
Abstract We analyze large‐amplitude upper‐band chorus emissions measured near the magnetic equator by Electric and Magnetic Field Instrument Suite Integrated Science instrument package on board Van Allen Probes. In setting up parameters of source electrons exciting based theoretical analyses observational results Helium Oxygen Proton Electron instrument, we calculate threshold optimum amplitudes with nonlinear wave growth theory. find that amplitude is larger than obtained in frequency range...
It is a common view that ballistic transport enhanced by channel length scaling because of decreased scattering number. On the other hand, acoustic phonon (AP) rate higher in silicon-on-insulator (SOI) MOSFETs than bulk Si-MOSFETs; moreover, surface roughness (SR) caused spatial fluctuation quantized subbands emerges extremely scaled SOI channels. Therefore, influences these mechanisms on ultrathin-body Si-MOSFETs are examined this paper using Monte Carlo simulation technique. First all,...
A gas analyzer based on the principle of ion backscattering has been developed to measure both pressures helium and deuterium is called A–U gauge. The gauge applied observe a detrapping process retained in graphite (IG-100 ) during rf-glow discharge with gas. behavior D atoms from discussed simplified local mixing model.
A three-dimensional neutral transport model using the DEGAS version 63 Monte Carlo code is described in order to understand behavior of neutrals non-axisymmetric anchor region GAMMA 10 tandem mirror. precise mesh structure with geometry was built up and simulation carried out under a plausible assumption particle source on basis experimental data. In standard ion-cyclotron-range-of-frequency heated plasmas, detailed measurements Hα line emission were performed 5-ch detector array...
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Physics. Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v1]Energetic electron precipitation induced oblique whistler mode chorus emissionsAuthorsYi-KaiHsiehYoshiharuOmuraiDYukoKubotaSee all authors Yi-Kai...
We perform test particle simulations of relativistic electrons interacting with Electromagnetic Ion Cyclotron (EMIC) triggered emissions in a dipole field [1, 2]. When the radiation belt interact EMIC emissions, some them are trapped by wave potential and efficiently guided down to lower pitch angles. Repeated interactions through mirror motion result scattering into loss cone [3]. By assuming geomagnetic field, we study effects longitudinal drift electrons. generated energetic ions drifting...