Kawai, Yoko - Search Results - CERN Document Server

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Simulation Studies of Diffusion-Release and Effusive-Flow of Short-Lived Radioactive Isotopes / Zhang, Yan ; Alton, Gerald ; Kawai, Yoko
Delay times associated with diffusion release from targets and effusive-flow transport of radioactive isotopes to ion sources are principal intensity limiters at ISOL-based radioactive ion beam facilities, and simulation studies with computer models are cost effective methods for designing targets and vapor transport systems with minimum delay times to avoid excessive decay losses of short lived ion species. A finite difference code, Diffuse II, was recently developed at the Oak Ridge National Laboratory to study diffusion-release of short-lived species from three principal target geometries. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1739

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Radioactive Ion Beam Development at the Holifield Radioactive Ion Beam Facility / Stracener, Dan ; Alton, Gerald ; Beene, James R ; Bilheux, Hassina Z ; Bilheux, Jean-Christophe ; Blackmon, Jeff C ; Carter, Ken ; Dowling, Darryl ; Juras, Raymond ; Kawai, Yoko et al.
Radioactive beams are produced at the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory using the Isotope Separator On-Line (ISOL) technique. Radioactive nuclei are produced in a thick target via irradiation with energetic light ions (protons, deuterons, helium isotopes) and then post-accelerated to a few MeV/nucleon for use in nuclear physics experiments. [...]
2005
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.e-proc. TPPE020

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Characterization of a Tubular Hot-Cavity Surface Ionization Source / Liu, Yuan ; Bilheux, Hassina Z ; Kawai, Yoko
Elements with low ionization potentials can be efficiently ionized by positive surface ionization. It has been experimentally observed and theoretically shown that the ionization efficiency in a hot-cavity can be significantly higher than expected for the surface ionization mechanism. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1581

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A New Broadband Microwave Frequency Device for Powering ECR Ion Sources / Kawai, Yoko ; Alton, Gerald ; Liu, Yuan
The multiple discrete frequency technique has been used to improve the performance of conventional B-field configuration ECR ion sources. However, the practical application of this technique is very costly, requiring multiple independent single-frequency rf power supplies and complicated rf injection systems. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1529

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ISOL Targets Prepared with a New Paint Infiltration Coating Method / Kawai, Yoko ; Alton, Gerald ; Kiggans, J O ; Stracener, Dan
A new infiltration paint coating method has been developed for fabricating ISOL targets for radioactive ion beam applications. The technique has been shown to be inexpensive, fast, and almost universal for the uniform deposition of many refractory target materials onto the interior surfaces of complex geometry matrices, such as Reticulated-Vitreous-Carbon-Foam (RVCF). [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1508

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The Effusive-Flow Properties of Target/Vapor-Transport Systems for Radioactive Ion Beam Applications / Kawai, Yoko ; Alton, Gerald ; Liu, Yuan
Radioactive atoms produced by the ISOL technique must diffuse from a target, effusively flow to an ion source, be ionized, be extracted, and be accelerated to research energies in a time commensurate with the lifetime of the species of interest. We have developed a fast valve system (closing time ~100 us) that can be used to accurately measure the effusion times of chemically active or inactive species through arbitrary geometry and size vapor transport systems with and without target material in the reservoir. [...]
2005 External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.1422

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See also: similar author names
9	Kawai, Y
1	Kawai, Y.
1	Kawai, Yoshifumi
1	Kawai, Yoshinobu
1	Kawai, Yosuke
1	Kawai, Yuji
1	Kawai, Yukiko

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