A5069180549- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Magnetic confinement fusion research
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Plasma Diagnostics and Applications
- Neutrino Physics Research
- Muon and positron interactions and applications
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Atomic and Molecular Physics
- Laser-Plasma Interactions and Diagnostics
- X-ray Spectroscopy and Fluorescence Analysis
- Pulsed Power Technology Applications
- Dialysis and Renal Disease Management
- Mass Spectrometry Techniques and Applications
- Ionosphere and magnetosphere dynamics
- Magnetic properties of thin films
- Nuclear reactor physics and engineering
- Solar and Space Plasma Dynamics
- Advanced X-ray Imaging Techniques
Yokohama City Seibu Hospital
2022-2025
St. Marianna University School of Medicine
2015-2025
Rutherford Appleton Laboratory
2015-2024
Saint Thomas - Rutherford Hospital
2024
Research Complex at Harwell
2017-2024
Brookhaven National Laboratory
2020
University of Marketing and Distribution Sciences
2019
ISIS Neutron and Muon Source
2017
Hiroshima University
2015
Devon History Society
2006-2011
This document summarizes the work of Accelerator Working Group (AWG) International Scoping Study (ISS) a Future Neutrino Factory and Superbeam Facility. The main goal activity was to reach consensus on baseline design for complex, including proton driver parameters, choice target, front-end design, acceleration system decay ring geometry. Another explore commonality, if any, between those or Beta Beam facility. In general, requirements either latter facilities are less stringent than...
A key challenge in particle accelerators is to achieve high peak intensity. Space charge particularly strong at lower energy such as during injection and typically limits achievable The beam stacking technique can overcome this limitation by accumulating a where space weaker. In stacking, bunch of particles injected accelerated energy. This continues circulate, while second subsequent bunches are merge into the first. It also allows user cycle acceleration cycles be separated which often...
The conceptual design for a nonscaling fixed field alternating gradient accelerator suitable charged particle therapy (the use of protons and other light ions to treat some forms cancer) is described.
Whether the effect of a low-protein diet on progression to end-stage renal disease (ESRD) and mortality risk differs between young elderly adults with chronic kidney (CKD) is unclear. We conducted retrospective CKD cohort study investigate association protein intake or outcomes whether age affects this association. The comprised 352 patients stage G3-5 who had been followed up for median 4.2 years, undergone educational hospitalization, whom baseline was estimated from 24-h urine samples....
Hypokalemia is one of the most common problems in emergency department (ED). Severe hypokalemia, defined as a serum potassium level ≤2.5 mEq/L, relatively uncommon electrolyte disorder, and few studies have reported its prevalence, etiology, symptoms, management ED. Therefore, we aimed to investigate them this study.This retrospective single-center study included adult patients whose levels were measured ED between 2012 2019. Data including age, sex, levels, creatinine collected from...
We have studied space charge effects in a synchrotron with multi-particle tracking 2-D and 3-D configuration (4-D 6-D phase space, respectively). First, we will describe the modelling of fields simulation procedure tracking. Several ways presenting results be also mentioned. Secondly, it is discussed as demonstration study that coherent modes beam play major role stability intensity limit. The incoherent tune resonance condition should replaced by tune. Finally, consider motion core driving...
A new design principle of a nonscaling fixed field alternating gradient accelerator is proposed. It based on optics that produce approximate scaling properties. large index $k$ chosen to squeeze the orbit shift as much possible by setting betatron oscillation frequency in second stability region Hill's equation. Then, lattice magnets and their alignment are simplified. To simplify magnets, we expand profile ${r}^{k}$ into multipoles keep only few lower order terms. rectangular-shaped magnet...
We present an experimental study aimed at exploring integer resonance crossing with a focus on nonscaling fixed field alternating gradient accelerators. The method uses the Simulator of Particle Orbit Dynamics system Hiroshima University based compact ion trap known as Paul trap. In setup that mimics Electron Model for Many Applications accelerator, we have verified theoretical prediction coherent excitation dipole motion over wide range errors and speeds. addition, cancellation amplitude...
Operation with natural chromaticity in a linear nonscaling fixed field alternating gradient (FFAG) accelerator causes crossing of the low order resonances such as integer and half-integer. Although those are not systematic ones, small errors, typical misalignment $10\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$ rms, significantly increase particle amplitude when is operated slow acceleration rate. For example, there practically no dynamic aperture if it takes 1000 turns to finish whole cycle....
The next generation of lepton flavor violation experiments need high intensity and quality muon beams. Production such beams requires sending a short, proton pulse to the pion production target, capturing pions collecting resulting muons in large acceptance transport system. substantial increase beam can be obtained by applying RF phase rotation on dedicated FFAG ring, which was proposed for PRISM project.This allows reduce momentum spread purify from unwanted components like or secondary...
Few studies have reported the prevalence and characteristics of hypouricemia in emergency department (ED). We investigated ED a university-affiliated hospital Japan.
A novel scaling type of fixed-field alternating gradient (FFAG) accelerator is proposed that solves the major problems conventional and nonscaling types. This FFAG can achieve a much smaller orbit excursion by taking larger field index k. triplet focusing structure makes it possible to set operating point in second stability region Hill's equation with reasonable sensitivity various errors. The about 5 times than beam size growth due typical errors at most 10%.
Space charge is typically one of the performance limitations for operation high intensity and brightness beams in circular accelerators. In Proton Synchrotron (PS) at CERN, losses are observed vertical tunes above ${Q}_{y}=6.25$, especially with large space tune shift. The work presented here shows that this behavior associated to structure resonances excited by due highly symmetric accelerator lattice PS, typical first generation alternating gradient synchrotrons. Experimental studies...
The fixed field alternating gradient (FFAG) accelerator is proposed as a muon because of its large aperture and no need magnet ramping. In particular, the nonscaling type FFAG has been studied simple magnets unique acceleration method using path out rf bucket. A recent 6D tracking study reveals, however, that time flight difference due to transverse amplitude causes longitudinal emittance blowup which limits acceptance. This serious problem for an expected accelerate beam with huge...
In a linear nonscaling fixed field alternating gradient (FFAG) accelerator, betatron tunes vary over wide range and beam has to cross integer half-integer several times. Although it is plausible say that resonances are not harmful if the crossing speed fast, no quantitative argument exists. With tracking simulation, we studied orbit optics distortion due alignment magnet errors. It was found concept of resonance irrelevant explain behavior in FFAG when acceleration fast change quickly. muon...