A5065819749- Radiation Therapy and Dosimetry
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Solid-state spectroscopy and crystallography
- Superconducting Materials and Applications
- Nuclear physics research studies
- Crystal Structures and Properties
- Ferroelectric and Piezoelectric Materials
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Radiation Effects in Electronics
- Advanced Radiotherapy Techniques
- Microwave Dielectric Ceramics Synthesis
- X-ray Diffraction in Crystallography
- Atomic and Subatomic Physics Research
- Physics of Superconductivity and Magnetism
- Luminescence Properties of Advanced Materials
- Quantum Chromodynamics and Particle Interactions
- Plasma Diagnostics and Applications
- Polyoxometalates: Synthesis and Applications
- Atomic and Molecular Physics
- Multiferroics and related materials
- Gynecological conditions and treatments
- Glass properties and applications
- Acoustic Wave Resonator Technologies
National Institutes for Quantum Science and Technology
2011-2024
Kyoto University
1979-2021
Toshiba (Japan)
1989-2020
Japan Atomic Energy Agency
2020
High Energy Accelerator Research Organization
2016
Gifu University
1988-2013
Nagoya University
2009-2012
Ibiden (Japan)
2011-2012
Southwest Research Institute
2011
Research Institute of Ceramics
2003-2011
We propose Bit-Cost Scalable (BiCS) technology which realizes a multi-stacked memory array with few constant critical lithography steps regardless of number stacked layer to keep continuous reduction bit cost. In this technology, whole stack electrode plate is punched through and plugged by another material. SONOS type flash successfully applied achieve BiCS memory. Its cell concept, fabrication process characteristics key features are presented.
A double-hyperfragment event has been found in a hybrid-emulsion experiment. It is identified uniquely as the sequential decay of ( 6)(LambdaLambda)He emitted from Xi(-) hyperon nuclear capture at rest. The mass and Lambda-Lambda interaction energy DeltaB(LambdaLambda) have measured for first time devoid ambiguities due to possibilities excited states. value 1.01+/-0.20(+0.18)(-0.11) MeV. This demonstrates that weakly attractive.
This paper introduces a new approach to measure the muon magnetic moment anomaly |$a_{\mu} = (g-2)/2$| and electric dipole (EDM) |$d_{\mu}$| at J-PARC facility. The goal of our experiment is |$a_{\mu}$| using an independent method with factor 10 lower momentum, 20 smaller diameter storage-ring solenoid compared previous ongoing |$g-2$| experiments unprecedented quality storage field. Additional significant differences from present experimental include 1000 transverse emittance beam...
Purpose: A project to construct a new treatment facility, as an extension of the existing HIMAC has been initiated for further development carbon‐ion therapy at NIRS. This facility is equipped with 3D irradiation system pencil‐beam scanning. The challenge this realize moving target by scanning irradiation. To achieve fast rescanning within acceptable time, authors developed system. Methods: In order verify validity design and demonstrate performance prior use in scanning‐irradiation was...
A hybrid experiment with nuclear emulsion and scintillating-fiber detectors (KEK-E373) has been performed to search for double-strangeness systems. Among about 10${}^{3}$ events of ${\ensuremath{\Xi}}^{\ensuremath{-}}$ hyperons captured at rest by nuclei, we have observed four which clearly show the topology cascade weak decays double-$\ensuremath{\Lambda}$ hypernuclei including ``Nagara'' event. Regarding Nagara event, values two-$\ensuremath{\Lambda}$ binding energy...
Radiation effects were demonstrably observed in silicon carbide power MOSFETs caused by heavy ion and proton irradiation. For higher LET ions, permanent damage (increase both drain gate leakage current) was similar to SiC Schottky Barrier diodes our previous study. lower including protons, Single Event Burnouts (SEBs) there no current increase just before SEBs. The phenomenon is unique for devices.
A superconducting rotating gantry for heavy-ion therapy is being designed. This isocentric can transport heavy ions with the maximum energy of $430\text{ }\text{ }\mathrm{MeV}/u$ to an isocenter irradiation angles over 0--360 degrees, and further capable performing three-dimensional raster-scanning irradiation. The combined-function magnets will be employed gantry. optimized beam optics allow a compact design large scan size at isocenter; length radius approximately 13 5.5 m, respectively,...
The National Institute of Radiological Sciences (NIRS) has initiated a development project for hypo-fractionated multi-ion therapy. In the treatment, heavy ions up to neon will be used as primary beam, which is high linear energy transfer (LET) radiation. fractionated dose treatment 10 Gy or more. microdosimetric kinetic (MK) model overestimates biological effectiveness high-LET and high-dose radiations. To address this issue, stochastic (SMK) been developed an extension MK model. By taking...
A 512-kb memory has been developed featuring a one-transistor gain cell of size 7F/sup 2/ (F = 0.18 /spl mu/m) on SOI. The named the floating body transistor (FBC) ability to achieve 4F/sup using self-aligned contact technologies and is proved be scalable with respect signal. basic operation was verified by device simulation hardware measurement. An array driving method disclosed which makes selective write possible. signal sensing system consisting pair reference cells written opposite data...
The first clinical trial with carbon beams generated from HIMAC was conducted in June 1994. total number of patients treated as December 2006 excess 3,000. In view the significant growth protocols, Japanese government gave its approval for carbon-ion therapy at NIRS an advanced medical technology 2003. impressive advances using have been supported by high-reliability operation and developments beam-delivery accelerator technologies. Based on our ten years experience HIMAC, we recently...
The single-event damage observed in AlGaN/GaN high-electron mobility transistors (HEMTs) was investigated. For power control applications, normally off operation is achieved by p-type GaN gate material and its rated drain-source voltage of 600 V. Because no insulator, rupture essentially excluded. Therefore, the HEMTs are expected to exhibit better immunity heavy ions comparison with SiC MOSFETs. In test results, two types catastrophic failure modes were different leakage current paths; one...
Electromagnetic field analyses were carried out to study the influence of coated-conductor magnetisation, i.e. screening (shielding) current, on quality a dipole magnet in rotating gantry for hadron cancer therapy. The made cross section cosine-theta carbon ions, which generated 2.90 T magnetic field. temporal profile (temporal variation) current was determined based actual excitation schemes magnets gantry. experimentally superconducting property coated conductor considered, and we...
We have developed an interdigital H-mode (IH) drift-tube linac (DTL) design with alternative phase focusing (APF) scheme for a muon linac, in order to measure the anomalous magnetic moment and electric dipole (EDM) of muons at Japan Proton Accelerator Research Complex (J-PARC). The IH-DTL accelerates from $\ensuremath{\beta}=v/c=0.08$ 0.28 operational frequency 324 MHz. output beam emittances are calculated as $0.315\ensuremath{\pi}$ $0.195\ensuremath{\pi}\text{ }\text{ }\mathrm{mm}\text{...
Charge-changing and fragment production cross sections have been obtained for interactions of a 600 MeV/nucleon neon beam in H, C, Al, Cu, Sn, Ta, Pb targets. The H target results were using polyethylene subtracting the with carbon target. At MeV/nucleon, angular distributions fragments are strongly forward peaked, consequently spectra seen detectors largest acceptance---corresponding to cone half angle 7\ifmmode^\circ\else\textdegree\fi{}---show obvious peaks only charges 5 through 9. No...
Charge-changing and fragment production cross sections at $0\ifmmode^\circ\else\textdegree\fi{}$ have been obtained for interactions of 290 400 MeV/nucleon carbon beams with C, CH${}_{2}$, Al, Cu, Sn, Pb targets. These are relevant to cancer therapy, space radiation, the radioactive beams. We compare these results against previously published using C CH${}_{2}$ targets similar beam energies. Because ambiguities arising from presence multiple fragments on many events, previous publications...
We report fragmentation cross sections measured at 0${}^{ˆ}$ for beams of $^{14}\mathrm{N}$, $^{16}\mathrm{O}$, $^{20}\mathrm{Ne}$, and $^{24}\mathrm{Mg}$ ions, energies ranging from 290 MeV/nucleon to 1000 MeV/nucleon. Beams were incident on targets C, CH${}_{2}$, Al, Cu, Sn, Pb, with the C CH${}_{2}$ target data used obtain hydrogen-target sections. Using methods established in earlier work, obtained both large-acceptance small-acceptance detectors are extracted and, when necessary,...