A5060682225- Particle accelerators and beam dynamics
- Muon and positron interactions and applications
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Accelerators and Free-Electron Lasers
- Urban Transport and Accessibility
- Transportation Planning and Optimization
- Superconducting Materials and Applications
- Plasma Diagnostics and Applications
- Particle Detector Development and Performance
- Transportation and Mobility Innovations
- Urban and Freight Transport Logistics
- Human Mobility and Location-Based Analysis
- Atomic and Molecular Physics
- Electrostatic Discharge in Electronics
- Fusion materials and technologies
- Magnetic confinement fusion research
- Neutrino Physics Research
- Advancements in Solid Oxide Fuel Cells
- Astrophysics and Cosmic Phenomena
- Vehicle emissions and performance
- Radiation Detection and Scintillator Technologies
- Gyrotron and Vacuum Electronics Research
- Economic and Environmental Valuation
Japan Proton Accelerator Research Complex
2021-2024
Clemson University
2023-2024
Japan Atomic Energy Agency
2019-2023
Tokyo University of Science
2015-2022
The University of Tokyo
2014-2022
Mitsubishi Electric (Japan)
2019
High Energy Accelerator Research Organization
2016
RIKEN Nishina Center
2014
University of California, Davis
2002
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...
Emission of muonium (|$\mu ^+e^-$|) atoms from a laser-processed aerogel surface into vacuum was studied for the first time. Laser ablation used to create hole-like regions with diameter about 270 |$\mu $|m in triangular pattern hole separation range 300–500 $|m. The emission probability sample is at least eight times higher than uniform one.
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 $0.315\ensuremath{\pi}$ $0.195\ensuremath{\pi}\text{ }\text{ }\mathrm{mm}\text{...
Muons have been accelerated by using a radio-frequency accelerator for the first time. Negative muonium atoms (${\mathrm{Mu}}^{\ensuremath{-}}$), which are bound states of positive muons (${\ensuremath{\mu}}^{+}$) and two electrons, generated from ${\ensuremath{\mu}}^{+}$'s through electron capture process in an aluminum degrader. The ${\mathrm{Mu}}^{\ensuremath{-}}$'s initially electrostatically injected into quadrupole linac (RFQ). In RFQ, to 89 keV. identified momentum measurement time...
Abstract The emission of muonium ($\mu^+e^-$) atoms into vacuum from silica aerogel with laser ablation on its surface was studied various structures at room temperature using the subsurface muon beams TRIUMF and Japan Proton Accelerator Research Complex (J-PARC). Laser applied to produce holes or grooves typical dimensions a few hundred $\mu$m mm, except for some extreme conditions. measured rate tends be higher larger fractions opening shallower depths. More than reach rates similar...
A muon linac development for a new g-2 experiment is now going on at J-PARC. Muons from the beam line (H line) J-PARC science facility are once stopped in silica-aerogel target, and room temperature muoniums evaporated aerogel. They dissociated with lasers, then accelerated up to 212 MeV using linear accelerator. For accelerating structure 40 MeV, disk-loaded traveling-wave applicable because particle beta more than 0.7. The itself similar that electron linacs, however, cell length should be...
Muon acceleration is an important technique in exploring the new frontier of physics. A measurement muon dipole moments planned J-PARC using linear accelerator. The low-energy (LE) source thin metal foil target and beam diagnostic system were developed for world's first acceleration. Negative muonium ions from as LE was successfully observed. Also profile positive measured by LE-dedicated monitor. test a Radio-Frequency Quadrupole linac (RFQ) being prepared step accelerator development. In...
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 1,000 transverse emittance beam (reaccelerated...
Abstract A disk and washer (DAW) coupled cavity linac (CCL) was developed for a mediumvelocity part in muon to measure anomalous magentic moment search electric dipole moment. Muons were accelerated from v / c = β 0.3 0.7 at an operational frequency of 1.3 GHz. In this paper, the design, beam dynamics cold-model measurements are presented.
The lack of high-performance cathode catalysts is a salient issue that bedeviled the commercialization protonic ceramic fuel cells (PCFCs). Here, we report remarkable electrocatalytic activity and stability enhancement electrodes by engineering coupled nanocomposite. as-prepared Pr0.3(Ba0.5Sr0.5)0.7Co0.8Fe0.2O3−δ nanocomposite possesses bulk cubic phase on which homogeneous intimate orthorhombic PrCo0.5Fe0.5O3−δ nanoparticles are uniformly decorated. X-ray diffraction Raman spectroscopy...
Abstract The mitigation of heat loading is one the important issues for beam instrumentation to measure high-power proton beam. Recently, highly-oriented pyrolytic graphite (HOPG) material was used target probe bunch-shape monitor at front end in Japan Proton Accelerator Research Complex (J-PARC). Since thermal conductivity HOPG high, it suitable both transverse and longitudinal profiles under condition high loading. As an application HOPG, example, thin may be as a substitutive wire profile...