A5010315794- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Astrophysics and Cosmic Phenomena
- Advanced MEMS and NEMS Technologies
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Photonic and Optical Devices
- Distributed and Parallel Computing Systems
- Mechanical and Optical Resonators
- Advanced Surface Polishing Techniques
- Advanced Data Storage Technologies
- Particle Accelerators and Free-Electron Lasers
- Solar and Space Plasma Dynamics
- Radiation Therapy and Dosimetry
- Optical Coatings and Gratings
- Neutrino Physics Research
- Advancements in Photolithography Techniques
- Acoustic Wave Resonator Technologies
- Scientific Computing and Data Management
- Computational Physics and Python Applications
- Fault Detection and Control Systems
- Advanced Fiber Optic Sensors
- Medical Imaging Techniques and Applications
- Optical Coherence Tomography Applications
Yokogawa Electric (Japan)
1991-2025
Japanese Foundation For Cancer Research
2025
Silicon Austria Labs (Austria)
2022-2024
Kanagawa University
2002-2024
Tohoku University
2015-2024
The University of Tokyo
2017-2023
Niigata Institute of Technology
2023
Tokyo Institute of Technology
2005-2023
Tohoku University Hospital
2017-2022
The Cancer Institute Hospital
2020
The intensity of Galactic cosmic rays is nearly isotropic because the influence magnetic fields in Milky Way. Here, we present two-dimensional high-precision anisotropy measurement for energies from a few to several hundred teraelectronvolts (TeV), using large data sample Tibet Air Shower Arrays. Besides revealing finer details known anisotropies, new component ray sidereal time uncovered around Cygnus region direction. For cosmic-ray up TeV, all components anisotropies fade away, showing...
We present the large-scale sidereal anisotropy ofgalactic cosmic-ray intensity in multi-TeV region observed with Tibet-IIIair shower array during period from 1999 through 2003. The daily variation of cosmic rays this experiment shows an excess relative around $4\sim7 $ hours local time, as well a deficit 12 time. While amplitude is not significant when averaged over all declinations, individual declinaton bands becomes larger and clearer viewing direction moves toward south. maximum phase...
Abstract We consider tidal decay lifetimes for moons orbiting habitable extrasolar planets using the constant Q approach evolution theory. Large stabilize planetary obliquity in some cases, and it has been suggested that large are necessary of complex life. find Moon Sun–Earth system must have had an initial orbital period not slower than 20 h rev −1 moon's lifetime to exceed a 5 Gyr lifetime. assume is long enough life on evolve show cannot survive more if stellar mass less 0.55 0.42 M ⊙ p...
We present the general properties of multihadron final states produced by e+e− annihilation at center-of-mass energies from 52 to 57 GeV in AMY detector KEK collider TRISTAN. Global shape, inclusive charged-particle, and particle-flow distributions are presented. Our measurements compared with QCD+fragmentation models that use either leading-logarithmic parton-shower evolution or QCD matrix elements parton level, string cluster fragmentation for hadronization.Received 20 November...
Results on steady TeV $\gamma$-ray point source search using data taken from the Tibet HD (Feb. 1997 -- Sep. 1999) and III (Nov. 1999 Oct. 2001) arrays are presented. From $0^{\circ}$ to $60^{\circ}$ in declination, significant excesses well-known Crab Nebula high state of flare type Markarian 421 observed. Because levels significance other positions not sufficiently high, 90% confidence level upper limits flux set assuming different power law spectra. To allow crosschecking, two...
Several strong TeV γ-ray flares were detected from Mrk 421 in the years 2000 and 2001 by Tibet III air shower array at a level of statistical significance 5.1 σ. was unprecedentedly active X-ray energies during this period, positive correlation found between change all-sky monitor Rossi X-Ray Timing Explorer flux flux. When power-law energy spectrum for γ-rays source is assumed, spectral index calculated to be -3.24 ± 0.69 most phase 2001. The observed consistent with those obtained via...
We present evidence for the non-Abelian nature of QCD from a study multijet events produced in ${e}^{+}$${e}^{\mathrm{\ensuremath{-}}}$ annihilations \ensuremath{\surd}s =50 to 57 GeV AMY detector at KEK storage ring TRISTAN. A comparison three-jet event fraction TRISTAN DESY PETRA shows that coupling strength ${\ensuremath{\alpha}}_{s}$ decreases with increasing ${Q}^{2}$. In addition, measurements angular distributions four-jet show triple-gluon vertex.
We formulated tidal decay lifetimes for hypothetical moons orbiting extrasolar planets with both lunar and stellar tides. Previous works neglected the effect of tides on planet rotation, are therefore applicable only to systems in which moon's mass is much less than that planet. This work, contrast, can be applied relatively large might detected around newly discovered Neptune-mass super-Earth planets. conclude more stable when planet/moon further from parent star, heavier, or stars lighter....
Data from high-energy physics (HEP) experiments are collected with significant financial and human effort mostly unique. An inter-experimental study group on HEP data preservation long-term analysis was convened as a panel of the International Committee for Future Accelerators (ICFA). The formed by large collider-based investigated technical organisational aspects preservation. intermediate report released in November 2009 addressing general issues HEP. This paper includes extends report. It...
Freestanding GaN waveguides were fabricated on a silicon substrate by combination of Cl2 plasma reactive ion etching and XeF2 gas selective etching. The freestanding ranged from 0.23 to 8 μm in width supported air bridge structures. structures designed via rigorous electromagnetic simulations using the finite-difference time-domain method. layer was grown epitaxially (111) buffer compensate for crystal lattice constant mismatch. Using two types masks, etched inductively coupled plasma....
Since 1996, a hybrid experiment consisting of the emulsion chamber and burst detector array Tibet-II air-shower has been operated at Yangbajing (4300 m above sea level, 606 g/cm2) in Tibet. This can detect cores, called events, accompanied by air showers excess about 100 TeV. We observed 4300 events during 690 days operation selected 820 proton-induced with its primary energy 200 TeV using neural network method. Using this data set, we obtained spectrum protons range from to 1000 The...
The Tibet experiment, operating at Yangbajing (4300 m above sea level), is the lowest energy air shower array, and new high-density array constructed in 1996 sensitive to gamma-ray showers energies as low 3 TeV. With this Crab Nebula was observed multi-TeV gamma-rays a signal detected 5.5 sigma level. We also obtained spectrum of region TeV which partially overlaps those with imaging atmospheric Cerenkov telescopes. can be represented by power-law fit...
We present the charged-particle multiplicity distributions for ${e}^{+}{e}^{\ensuremath{-}}$ annihilation at center-of-mass energies from 50 to 61.4 GeV. The results are based on a data sample corresponding total integrated luminosity of 30 ${\mathrm{pb}}^{\ensuremath{-}1}$ obtained with AMY detector KEK storage ring TRISTAN. deviate significantly modified Poisson and pair distributions, but follow Koba-Nielsen-Olesen scaling well reproduced by LUND parton-shower model.
We present a varifocal scanning micromirror fabricated from silicon-on-insulator wafer. The consists of mirror with rotational function. scanner and are driven by comb parallel-plate electrostatic actuators, respectively. rotates 5.5° at 45 V in static mode. curvature the is changed -4 m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> (-128-mm focal length) to +5 (+93-mm applying voltage 0 50 V. It confirmed that lateral position spot...