A5091085003- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Advanced X-ray Imaging Techniques
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Laser Design and Applications
- Terahertz technology and applications
- Photonic and Optical Devices
- Crystallography and Radiation Phenomena
- Quantum Chromodynamics and Particle Interactions
- Magnetic confinement fusion research
- Low-power high-performance VLSI design
- Photocathodes and Microchannel Plates
- Laser-Plasma Interactions and Diagnostics
- Atomic and Molecular Physics
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Advanced DC-DC Converters
- Electromagnetic Simulation and Numerical Methods
- Multilevel Inverters and Converters
- Analog and Mixed-Signal Circuit Design
- Advanced Electron Microscopy Techniques and Applications
Fukuoka University
2023-2024
Tohoku University
2006-2024
Kyoto Institute of Technology
2008
Osaka City University
1994-2006
Osaka University
1982-2006
Hitachi (Japan)
2002
Ibaraki University
2002
University of Minnesota
2002
Institute for Molecular Science
1992-2000
Okazaki National Research Institutes
1998
Nephrolithiasis is a scientific term that refers to kidney stones and means the formation of crystal concretions in kidney. It considered widespread situation affects millions people worldwide. Those can cause serious discomfort infected people, especially when they traverse urinary system, although, big may need surgical intervention. Various systems are already use address stones, including ultrasound imaging for detection, extracorporeal shock wave lithotripsy (ESWL) non-invasive stone...
A compact racetrack-type 700 MeV storage ring (HiSOR) has been constructed at Hiroshima Synchrotron Radiation Center (HSRC). As the was planned for synchrotron radiation research on science and technology using VUV to X-rays up 5 keV with limited size cost, designed (i) realize a high magnetic field (2.7 T) conventional dipole magnets higher critical energy, (ii) include two straight sections insertion devices. linear undulator (25-300 eV) new-type helical/linear were installed sections. The...
An accelerator test facility, t-ACTS, established at Research Center for Electron Photon Science, Tohoku University, equips an injector consisted with a thermionic RF gun together energy filter and 3 m traveling wave accelerating structure. A long-period undulator has been also installed provide THz superradiance. Velocity bunching scheme proposed by Serafini Ferrario is employed ultra-short electron pulses production. non-relativistic bunch, which slightly slower than the velocity of light,...
The beam from thermionic RF gun is quite suitable for the bunch compression by means of velocity bunching. Since very stable in general, we anticipate short electron pulses length around 50 fs can be provided satisfactorily. t-ACTS program has been developed toward updating terahertz science and technology which intense coherent synchrotron radiation (CSR) bunches will employed. Careful numerical simulation showed possibility less than 100 with a charge 20 pC, provide sufficiently large form...
This paper presents evaluation results of a power- efficient JPEG compression circuit utilizing approximate computing. To achieve power efficiency, we replace summations in Discrete Cosine Transform (DCT) with additions that follow Carry-Maskable Adder (CMA) [1]. We evaluate both the quality compressed images and consumed by circuit. However, observed unexpected where consumption increased despite use approximation, contradicting our expectations. Our detailed investigations revealed...
In order to study the properties of hot nuclei, neutrons emitted in $^{40}\mathrm{Ar}$+Ni, $^{92}\mathrm{Mo}$, $^{122}\mathrm{Sn}$ reactions at E/A=26 MeV were measured coincidence with fusion residues. The neutron spectra obtained for different residue velocities analyzed moving source model. are well reproduced two sources; one corresponds preequilibrium emission and other decay nuclei. extracted multiplicity initial temperature nuclei indicate formation thermally equilibrated excitation...
The temporal profile measurement for ultra-short electron bunches is one of the key issues accelerator-based coherent light sources. A bunch length system using Cherenkov radiation (CR) under development at Research Center Electron Photon Science, Tohoku University. This allows real-time diagnostics bunches. comprises a thin silica aerogel as radiator, specially designed optical transport line, and high-speed streak camera. can be obtained by measuring time spread CR from electrons passing...
Novel current-source and voltage-source power converter systems with 36-step input waveforms are proposed. Each of the consist two main converters coupled harmonic canceling AC-side reactors an additional DC-side interphase transformers. The injects into DC links ripple currents or voltages having a frequency six times that line frequencies. proposed suitable for high applications because their low switching frequencies distortion waveforms. system configurations operations presented...