A5054342331- Particle accelerators and beam dynamics
- Laser-Plasma Interactions and Diagnostics
- Particle Accelerators and Free-Electron Lasers
- Ion-surface interactions and analysis
- Plasma Diagnostics and Applications
- Magnetic confinement fusion research
- Laser-induced spectroscopy and plasma
- Radiation Therapy and Dosimetry
- Laser Design and Applications
- Gyrotron and Vacuum Electronics Research
- Pulsed Power Technology Applications
- Nuclear Physics and Applications
- Diamond and Carbon-based Materials Research
- Fusion materials and technologies
- Atomic and Molecular Physics
- Blood groups and transfusion
- Nuclear Materials and Properties
- Platelet Disorders and Treatments
- Integrated Circuits and Semiconductor Failure Analysis
- Metal and Thin Film Mechanics
- Laser-Matter Interactions and Applications
- Mass Spectrometry Techniques and Applications
- Near-Field Optical Microscopy
- Cold Atom Physics and Bose-Einstein Condensates
- Plant Genetic and Mutation Studies
National Institutes for Quantum Science and Technology
2017-2025
Japan Atomic Energy Agency
2006-2015
Advanced Science Research Center
2004-2013
Takasaki Advanced Radiation Research Institute
2010
Osaka University
1992-2009
RIKEN
2008
Tokyo Institute of Technology
2002-2006
Ministry of Economy, Trade and Industry
1974
University of Electro-Communications
1973
Abstract Ultraprecise single-ion irradiation is practically of interest for the application research and development quantum materials devices. To achieve this, a system, consisting linear Paul trap (LPT) electrostatic bipotential lenses, being developed at Takasaki Institute Advanced Quantum Science, National Institutes Science Technology. In this paper, we conduct detailed multiparticle simulations on controlled ejection single ions from two-component Coulomb crystal generated in LPT,...
Simultaneous irradiation effects of He on tungsten blistering with hydrogen and carbon mixed ion beam were investigated. It was found that only 0.1% addition ions to 1 keV H C (C:0.8-1.0%) reduced (at 473 K) or completely suppressed 653 K 723 blister formation. In order obtain more detailed result, two sources used irradiate different energies. the energy 0.6 (1.5 H&C),significant observed, while in energies 1.0 1.5 keV, formation suppressed. These results suggested a bubble layer diffusion...
The idea of direct plasma injection scheme (DPIS) was proposed in 2000. This new technique has been studied and proven to accelerate intense ion beams. To provide medium mass ions with highly charged states, small tabletop solid lasers were used for production. Based on the measured properties, aluminum carbon accelerated more than 60 mA current. next experiments will use an radio frequency quadrupole designed q/m=1/6 explore beam productions using targets up silver, future work production...
The feasibility of a “direct injection scheme” using Nd–yttritium–aluminum–garnet laser has been studied experimentally. relationship between charge distribution and power density was measured. obtained yield rate C6+ 46.8% at the peak current pulse with 1.6×1011 W/cm2 intensity. dependence distance from target this intensity will be 60 mA φ4.8 mm extraction aperture. It found input beam condition simulation by code PTEQ–HI that high (from 12 to 28.6 mA) can accelerated TIT–RFQ.
The single-pulse formation technique using a beam chopping system consisting of two types high-voltage kickers was improved to enhance the quality and intensity with pulse interval over 1 μs at Japan Atomic Energy Agency cyclotron facility. A contamination rate neighboring bunches in reduced less than 0.1%. Long-term purification single guaranteed by well-controlled magnetic field stabilization for magnet. Reduction multi-turn extraction number suppressing bunch achieved restriction phase...
Acceleration of a 17mA, 100keV∕u C6+ ion beam has been successfully achieved with an radio frequency quadrupole (RFQ) linac by means “direct injection scheme.” The produced laser source Nd:YAG was injected to the high current RFQ linac. It experimentally proved that fully stripped carbon more than 10mA accelerated
We have been studying a new heavy-ion production technique called “direct plasma injection scheme,” DPIS, since 2000. A radio frequency quadrupole (RFQ) designed especially for the DPIS was commissioned in 2004 and very intense carbon beam successfully obtained, reaching more than 60mA accelerated current from RFQ. Most of contents 4+ as verified by analysis.
We have developed a new technique for analysis and control of the acceleration beam phase in cyclotron. In this technique, current pattern at fixed radius r is measured by slightly scanning frequency The obtained analyzing symmetry pattern. Simple procedure to changing coil currents few trim coils was established. width also gradient decreasing part verified reliability with 260 MeV (20)Ne(7+) beams which were accelerated on different tuning condition When around 0 degrees, top energy gain...
A new efficient injection method from a laser ion source to Radio Frequency Quadropole (RFQ) was proposed and is being tested in RIKEN, Japan. plasma induced just before the entrance of RFQ injected directly into channel. Using an existing RFQ, first verification tests have been completed successfully. Finally, preliminary specifications for dedicated scheme are presented.
Irtran-2 and ZnSe were used as temperature-controlled etalons to generate multiline oscillation of a TEA CO2 laser. Different combinations multilines the 10.6-μm band obtained with good reproducibility by temperature controlling these in laser cavity.
To apply a laser ion source that generates high-intensity pulsed beam to high-dose applications, such as implantation, high repetition rate operation with short pulse interval is required. However, when the shortened, there concern plasma, which different from single plasma generation, may be formed due interaction between preceding and following pulses. We investigated time in pulses are generated without pulse-to-pulse using two lasers. In experiment, graphite target was irradiated by...
In a laser ion source, plasma drift distance is one of the most important design parameters. Ion current density and beam pulse width are defined by between target extraction position. direct injection scheme, which uses source radio frequency quadrupole linac, we can apply relatively higher electric field at due to unique shape positively biased electrode. However, when aim very high acceleration such as several tens milliamperes, observed mismatched conditions. We tested three different...
Ion implanters require various kinds of heavy-ion beams in low-charge states for material science experiments. For this purpose, a laser ion source has been developed the implanter at Takasaki Accelerators Advanced Radiation Application. In study, we investigated particle number ions per pulse each charge state laser-produced carbon plasma. experiment, plasma was generated from graphite target using Nd:YAG (1064 nm wavelength, 5 ns width) energy 37.5 mJ, 28.3 or 15.6 mJ. The evaluated...