A5064440076- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Magnetic confinement fusion research
- Nuclear reactor physics and engineering
- Radiation Therapy and Dosimetry
- Atomic and Molecular Physics
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Muon and positron interactions and applications
- Radiation Detection and Scintillator Technologies
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Graphite, nuclear technology, radiation studies
- Peripheral Artery Disease Management
- Atomic and Subatomic Physics Research
- Metallic Glasses and Amorphous Alloys
- Material Dynamics and Properties
- Advancements in Photolithography Techniques
- Laser-induced spectroscopy and plasma
- Pulsed Power Technology Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Ocular and Laser Science Research
- Veterinary medicine and infectious diseases
Sakakibara Hospital
2025
Japan Atomic Energy Agency
2015-2024
Japan Proton Accelerator Research Complex
2015-2024
University of Fukui
2010-2013
Kyoto University Research Reactor Institute
2007
High Energy Accelerator Research Organization
2006
Hiroshima University
2002-2006
University of Hyogo
2004
Osaka University
1936-2004
Advance (Japan)
2002
The 3-GeV rapid cycling synchrotron (RCS) of the Japan Proton Accelerator Research Complex (J-PARC) is now in final beam commissioning phase, aiming for a design output power 1 MW. With series injector linac upgrades 2013 and 2014, RCS developed high-intensity test, launched 1-MW tuning October 2014. most important issues realizing such high-power continuous operation are to control minimize loss maintaining machine activations within permissible levels. In RCS, numerical simulation was...
A tabletop experimental system has been developed for the study of various collective effects in space-charge-dominated beams. It is based on recently proposed idea that dynamic motion a one-component plasma trap can be made physically equivalent to charged-particle beam propagating through linear transport channel. In this paper, we report details and results test experiments with compact Paul divided into several independent sections. The design carried out consideration practical...
In the 3-GeV rapid cycling synchrotron of Japan Proton Accelerator Research Complex, transverse injection painting is utilized not only to suppress space-charge induced beam loss in low energy region but also mitigate foil scattering during charge-exchange injection. The well minimized by combination modest and full longitudinal painting. But, for sufficiently mitigating part loss, area has be further expanded. However, such a wide-ranging had been realized until recently due beta function...
In the Japan Proton Accelerator Research Complex, purpose of 3 GeV rapid cycling synchrotron (RCS) is to accelerate a 1 MW, high-intensity proton beam. To achieve beam operation at repetition rate 25 Hz high intensities, RCS was elaborately designed. After starting operation, we carefully verified validity its design and made certain improvements establish reliable higher power as possible. Consequently, demonstrated power, namely, MW. We then summarized design, actual performance, MW
Ultra intense laser interaction with solids is crucially modified by the presence of plasma layer created prepulse associated peak intensity pulse. Here interferometric measurements preplasma a 40 TW, 600 fs Nd-glass are reported. Density profile and its target dependence measured predicted scale length on atomic number confirmed.
We identify an essential factor that limits the lowest achievable temperature of a stored hadron beam when it is cooled. Two different numerical techniques, i.e. particle-in-cell and molecular dynamics methods, are employed to simulate collective behavior in storage ring. It demonstrated cooling process can be strongly interrupted by linear nonlinear resonance stopbands. In particular, serious tune locking occurs second-order coherent encountered during cooling. show that, order reach...
A novel DNA analysis method based on physical molecular manipulation is proposed and experimentally demonstrated. On a glass substrate deposited sacrificial layer, carrier layer pair of electrodes, onto which the solution fed. By applying high frequency voltage, stretched straight aligned, with one its end anchored electrode edge, immobilized layer. Then using an AFM stylus as knife, portion together cut, by dissolving recovered membrane filter. Successful recovery demonstrated PCR.
The two-particle model, first introduced by Hasse, is employed to predict the beam temperature at which a one-dimensional ordered state of ions will be established in cooler storage ring. proposed does not have (in frame) rest, but simply has them passing each other; i.e., remaining same (ordered) sequence. model applicable an ultra-low-density where collective Coulomb interactions are negligible. It pointed out that nature anomalous behavior observed electron-cooling experiments GSI...
The J-PARC 3-GeV rapid cycling synchrotron (RCS) has recently achieved a 1-MW beam operation with considerably low fractional loss of couple 10−3 as result continuous efforts iterating experiments and numerical simulations. This success the opened door to further power ramp-up beyond 1 MW; we are now promoting 1.2∼1.5-MW-equivalent high-intensity tests looking ahead future upgrades at J-PARC. In this article, first review current status in operation, then presenting recent results 1.2-MW...
The J-PARC 3-GeV rapid cycling synchrotron (RCS) provides a high-power beam to both the materials and life science experimental facility (MLF) main ring (MR) by switching destination pulse pulse. To meet different requirements from MLF MR while keeping loss within permissible levels, RCS has recently introduced pulse-by-pulse of operational parameters such as injection painting emittance, chromaticity betatron tune. This paper reports recent efforts made for performance upgrade RCS.
Double-differential thick target neutron yields (TTNYs) for Fe, Pb, and Bi targets induced by 107-MeV protons were measured using the fixed-field alternating gradient accelerator at Kyoto University research development of accelerator-driven systems (ADSs) fundamental ADS reactor physics Critical Assembly (KUCA). Note that TTNYs obtained with time-of-flight method a detector system comprising eight detectors; each has small EJ-301 liquid organic scintillator photomultiplier tube. The...
The dynamic behavior of a bunched one-dimensional crystalline beam is studied theoretically. It shown that, owing to the existence momentum dispersion, Coulomb chain traveling in storage ring performs complex periodic oscillation whenever it exposed longitudinal radio-frequency force. equations motion are derived predict pattern an arbitrary lattice structure. validity present theory confirmed through multiparticle simulations. Various features oscillating string beam, such as...