Search Results - "MIKADO, T"

A positron lifetime spectroscopy apparatus for surface and near-surface positronium experiments by Suzuki, R, Ohdaira, T, Mikado, T

“…A positron lifetime spectroscopy apparatus, which utilizes an intense pulsed positron beam generated by an electron linear accelerator, is presented. Using…”
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Simulation for spectral evolution of a storage ring free electron laser in a macropulse zone by Sei, N, Yamada, K, Yasumoto, M, Ogawa, H, Mikado, T

“…A computer simulation for evolution of a storage ring free electron laser (SRFEL) micropulse in a macropulse zone has been performed. The one-dimension…”
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Simulation study on the coherent harmonic generation at the NIJI-IV FEL with a hole-coupled resonator by Ogawa, H, Yamada, K, Sei, N, Yasumoto, M, Mikado, T

“…Generation of the VUV radiation has been numerically studied based on coherent harmonic generation (CHG) scheme at NIJI-IV with a hole-coupled resonator. The…”
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Dynamic behavior of the NIJI-IV storage ring free electron laser by Yamada, K., Sei, N., Yasumoto, M., Ogawa, H., Mikado, T., Ohgaki, H.

“…Temporal and spectral characteristics of the NIJI-IV FEL were investigated around 300 nm using a dual-sweep streak camera and a monochromator. It was found…”
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Lasing below 200 in the NIJI-IV compact storage-ring-based free electron laser by Yamada, K, Sei, N, Ogawa, H, Yasumoto, M, Mikado, T

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Study of expected performance of the hard X-ray beam for the FEL-X project by Sei, N., Yamada, K., Ohgaki, H., Mikado, T., Yasumoto, M., Ogawa, H.

“…We advance the FEL-X project and plan to install a new optical klystron for the infrared FELs within next year. The expected FEL gain at a wavelength of 10.6…”
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Characteristics of the NIJI-IV UV-VUV FEL system—toward lasing down to 150 nm using a compact storage ring by Yamada, K, Sei, N, Ohgaki, H, Mikado, T, Yamazaki, T

“…Improvement of the NIJI-IV free electron laser (FEL) system is in progress. Recent gain enhancement made the lasing more stable in the wavelength range from…”
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Positron re-emission from tungsten surfaces by Suzuki, R, Amarendra, G, Ohdaira, T, Mikado, T

“…Positron re-emission properties of 50 μm thick polycrystalline tungsten foil and single crystalline tungsten specimen with (110) surface were measured as a…”
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Lasing Towards the VUV in the NIJI-IV FEL by Yamada, K, Sei, N, Ohgaki, H, Mikado, T, Sugiyama, S, Yamazaki, T

“…The lasing wavelength in the NIJI-IV free electron laser (FEL) reached 212 nm in the deep ultraviolet (UV) range. Adoption of Al 2O 3/SiO 2 multilayer mirrors…”
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Characterization of H-related defects in H-implanted Si with slow positrons by Fujinami, M, Suzuki, R, Ohdaira, T, Mikado, T

“…The thermal behavior of H-related defects in H-implanted Si has been investigated by positron beams. It is found that positrons are sensitive to the H-related…”
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Plasma-polymerized hexamethyldisiloxane films characterized by variable-energy positron lifetime spectroscopy by Wang, C. L., Kobayashi, Y., Togashi, H., Kato, K., Hirotsu, T., Hirata, K., Suzuki, R., Ohdaira, T., Mikado, T.

“…Nanometer‐size holes in plasma‐polymerized thin films were characterized by variable‐energy positron lifetime spectroscopy for the first time…”
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Improvement of the beam quality by chromaticity correction for wavelength shortening in the NIJI-IV FEL by Sei, N., Yamada, K., Ohgaki, H., Litvinenko, V.N., Mikado, T., Yamazaki, T.

“…Electron-beam qualities improved by chromaticity correction in the storage ring NIJI-IV were investigated at the beam energy of 309 MeV…”
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Characteristics of the NIJI-IV UV-VUV FEL system—toward lasing down to 150nm using a compact storage ring by Yamada, K, Sei, N, Ohgaki, H, Mikado, T, Yamazaki, T

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Characterization of photoresists for ArF-excimer laser lithography using monoenergetic positron beams by Uedono, A., Ohdaira, T., Suzuki, R., Mikado, T., Fukui, S., Kimura, S., Miyamoto, H., Nemoto, H.

“…The volume and depth distributions of open spaces in photoresist films designed for ArF‐excimer laser light exposure were studied with monoenergetic positron…”
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Improvement of the RF system in the storage ring NIJI-IV for VUV free electron lasers by Sei, N, Yamada, K, Mikado, T, Ohgaki, H, Sugiyama, S, Yamazaki, T

“…A new RF cavity was installed in place of the old one in the storage ring NIJI-IV and electron-beam qualities in the NIJI-IV were investigated. This cavity has…”
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Characteristics of the NIJI-IV FEL at the electron-beam energy of 263 MeV by Sei, N., Yamazaki, T., Yamada, K., Sugiyama, S., Mikado, T., Ohgaki, H.

“…Electron-beam qualities and characteristics of the FEL oscillation with the NIJI-IV FEL system were investigated at the low electron-beam energy of 263 MeV…”
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Open spaces in the subsurface region of polyethylene probed by monoenergetic positron beams by Uedono, A., Suzuki, R., Ohdaira, T., Uozumi, T., Ban, M., Kyoto, M., Tanigawa, S., Mikado, T.

“…Open spaces in the subsurface region (<10 μm) of very low density polyethylene were probed by a monoenergetic positron beam. From measurements of Doppler…”
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Defects introduced into SrTiO3 by auto-feeding epitaxy studied using positron annihilation technique by Uedono, A., Kiyohara, M., Shimoyama, K., Yamabe, K., Ohdaira, T., Suzuki, R., Mikado, T.

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Variable-energy positron lifetime study of silicon-oxide films plasma deposited from hexamethyldisiloxane and oxygen mixtures by Wang, C. L., Kobayashi, Y., Togashi, H., Hirata, K., Suzuki, R., Ohdaira, T., Mikado, T., Hishita, S.

“…Mixtures of hexamethyldisiloxane [HMDSiO, (CH3)3SiOSi(CH3)3] and oxygen are plasma polymerized at different oxygen pressures (P O 2 = 1.3–11.4 Pa) and a fixed…”
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Lasing down to the deep UV in the NIJI-IV FEL by Yamada, K., Sei, N., Yamazaki, T., Ohgaki, H., Litvinenko, V.N., Mikado, T., Sugiyama, S., Kawai, M., Yokoyama, M.

“…Lasing has been obtained at the wavelengths down to the deep UV on the NIJI-IV free electron laser (FEL) system. The shortest wavelength obtained was 228 nm…”
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