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Journal Articles

New precise measurement of muonium hyperfine structure interval at J-PARC

Ueno, Yasuhiro*; Aoki, Masaharu*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Keiichi*; Ito, Takashi; Iwasaki, Masahiko*; et al.

Hyperfine Interactions, 238(1), p.14_1 - 14_6, 2017/11

 Times Cited Count:2 Percentile:12.39

Journal Articles

New muonium HFS measurements at J-PARC/MUSE

Strasser, P.*; Aoki, Masaharu*; Fukao, Yoshinori*; Higashi, Yoshitaka*; Higuchi, Takashi*; Iinuma, Hiromi*; Ikedo, Yutaka*; Ishida, Keiichi*; Ito, Takashi; Iwasaki, Masahiko*; et al.

Hyperfine Interactions, 237(1), p.124_1 - 124_9, 2016/12

 Times Cited Count:5 Percentile:6.11

JAEA Reports

Development of multilayer mirrors for use in the wavelength region of 4 nm

Ishino, Masahiko; Yoda, Osamu*; Koike, Masato

JAERI-Research 2005-019, 13 Pages, 2005/09

JAERI-Research-2005-019.pdf:1.46MB

We have developed soft X-ray multilayer mirrors for use around the wavelength region of 4 nm including the K-absorption edge of carbon ($$lambda = 4.4 nm$$). We have chosen Co$$_3$$O$$_4$$ and Cr as the final candidate materials for absorber layers, and SiO$$_2$$ and Sc for the spacer materials as the result of theoretical invitation. Co$$_3$$O$$_4$$/SiO$$_2$$, Co$$_3$$O$$_4$$/Sc and Cr/Sc multilayer mirrors have been fabricated by means of an ion beam sputtering (IBS) method. As the result of structure evaluations with X-ray diffraction measurement, we have found that the fabricated Co$$_3$$O$$_4$$/Sc and Cr/Sc multilayer mirrors have stable structures. Soft X-ray reflectivity measurements for fabricated multilayer mirrors are carried out in the wavelength region of 4 nm with a synchrotron radiation source. We have found that the Cr/Sc multilayer mirror has a high soft X-ray reflectivity. However, soft X-ray reflectivities below the absorption edge of carbon are reduced. The analyses obtained by EPMA and SIMS suggested that this phenomenon was attributed to contamination of carbon.

Journal Articles

Probe measurements; Fundamentals to advanced applications

Amemiya, Hiroshi*; Wada, Motoi*; Toyoda, Hirotaka*; Nakamura, Keiji*; Ando, Akira*; Uehara, Kazuya; Oyama, Koichiro*; Sakai, Osamu*; Tachibana, Kunihide*

Purazuma, Kaku Yugo Gakkai-Shi, 81(7), p.482 - 525, 2005/07

This article is asked to write by the Japan Society of Plasma Science and Nuclear Fusion Research. The probe diagnostics in fusion plasma is explaind for many readers of the Journal of Plasma and Fusion Research, who have much concerned on various aspects.In section one, the method to estimate the electron temperature and the density as well as the electron energy distribution function with the single probe is given. In section two, the method to estimate the ion temperature and the flow velocity with the double probe is given. The practical measurements are explained introducing the data obtained at JFT-2, JFT-2a and JFT-2M in JAERI tokamak.

Journal Articles

Fabrication of multilayer mirrors consisting of oxide and nitride layers for continual use across the K-absorption edge of carbon

Ishino, Masahiko; Yoda, Osamu

Applied Optics, 43(9), p.1849 - 1855, 2004/03

 Times Cited Count:1 Percentile:90.83(Optics)

The development of multilayer mirrors for continual use around the K-absorption edge of carbon (4.4 nm) has been begun. Co$$_3$$O$$_4$$, SiO$$_2$$, and BN are found to be suitable for multilayer mirrors based on theoretical calculations for wavelengths around the carbon K-absorption edge region. X-ray reflectivity curves with Cu$$K$$$$_{alpha1}$$ X rays of the fabricated Co$$_3$$O$$_4$$/SiO$$_2$$ multilayers have sharp Bragg peaks and the layer structures evaluated from TEM observations are uniform. On the other hand, the Bragg peaks of Co$$_3$$O$$_4$$/BN multilayers split and aggregated Co$$_3$$O$$_4$$ is observed. To improve the Co$$_3$$O$$_4$$ layer structure, Cr$$_2$$O$$_3$$ was mixed into Co$$_3$$O$$_4$$. The mixed oxide layer structure in the Mix/BN multilayer (Mix = Co$$_3$$O$$_4$$ + Cr$$_2$$O$$_3$$) is relatively uniform and the Bragg peaks do not split.

Journal Articles

Heat stability of Mo/Si multilayers inserted with compound layers

Ishino, Masahiko; Yoda, Osamu; Takenaka, Hisataka*; Sano, Kazuo*; Koike, Masato

Surface & Coatings Technology, 169-170(1-3), p.628 - 631, 2003/06

no abstracts in English

Journal Articles

Heat stability of Mo/Si multilayers inserted with silicon oxide layers

Ishino, Masahiko; Yoda, Osamu; Sano, Kazuo*; Koike, Masato

X-Ray Mirrors, Crystals, and Multilayers II (Proceedings of SPIE Vol.4782), p.277 - 284, 2002/12

no abstracts in English

Journal Articles

Optimization of the silicon oxide layer thicknesses inserted in the Mo/Si multilayer interfaces for high heat stability and high reflectivity

Ishino, Masahiko; Yoda, Osamu

Journal of Applied Physics, 92(9), p.4952 - 4958, 2002/11

 Times Cited Count:5 Percentile:74.37(Physics, Applied)

no abstracts in English

Journal Articles

New type of Monk-Gillieson monochromator capable of covering a 0.7- to 25-nm range

Koike, Masato; Sano, Kazuo*; Harada, Yoshihisa*; Yoda, Osamu; Ishino, Masahiko; Tamura, Keisuke*; Yamashita, Kojun*; Moriya, Naoji*; Sasai, Hiroyuki*; Jinno, Masafumi*; et al.

X-Ray Mirrors, Crystals, and Multilayers II (Proceedings of SPIE Vol.4782), p.300 - 307, 2002/07

For the purpose of realizing an evaluation beamline for characterizing soft X-ray optical elements in a wide wavelength range of 0.7-25 nm, we have designed and constructed a new type of monochromator that combined two types of Monk-Gillieson monochromators. One is a conventional type equipped with three varied-line-spacing plane gratings, allowing a choice of two included angles. The other is a new type that employs a scanning mechanism based on Surface Normal Rotation (SNR). The SNR scheme provides high throughput at short wavelengths and simple scanning mechanism by means of a grating rotation about its normal. The monochromator is operated in the SNR and conventional modes over the ranges of 0.7-2.0 nm and 2.0-25 nm, respectively. In this paper we describe the optical and mechanical designs of the monochromator, wavelength calibrations in the SNR mode, and preliminary experimental data, such as the transmittance of an Al filter at $$sim$$0.8 nm and the total yield photoelectron measurement on a MgO powder in a wavelength rage of 0.7-2 nm.

Journal Articles

Boundary structure of Mo/Si multilayers for soft X-ray mirrors

Ishino, Masahiko; Yoda, Osamu; Haishi, Yasuyuki*; Arimoto, Fumiko*; Takeda, Mitsuhiro*; Watanabe, Seiichi*; Onuki, Somei*; Abe, Hiroaki

Japanese Journal of Applied Physics, Part 1, 41(5A), p.3052 - 3056, 2002/05

 Times Cited Count:10 Percentile:57.01(Physics, Applied)

no abstracts in English

Journal Articles

New evaluation beamline for soft X-ray optical elements

Koike, Masato; Sano, Kazuo*; Yoda, Osamu; Harada, Yoshihisa*; Ishino, Masahiko; Moriya, Naoji*; Sasai, Hiroyuki*; Takenaka, Hisataka*; Gullikson, E. M.*; Mrowka, S.*; et al.

Review of Scientific Instruments, 73(3), p.1541 - 1544, 2002/03

 Times Cited Count:20 Percentile:29.1(Instruments & Instrumentation)

no abstracts in English

Journal Articles

X-ray scattering study of interfacial roughness correlation in Mo/Si multilayers fabricated by ion beam sputtering

Ulyanenkov, A.*; Matsuo, R.*; Omote, Kazuhiko*; Inaba, Katsuhiko*; Harada, Jimpei*; Ishino, Masahiko; Nishii, Masanobu; Yoda, Osamu

Journal of Applied Physics, 87(10), p.7255 - 7260, 2000/05

 Times Cited Count:32 Percentile:22.38(Physics, Applied)

no abstracts in English

JAEA Reports

Design and manufacture of a testing device for the evaluation of optical elements

Shimizu, Yuichi; Yoda, Osamu; Sasuga, Tsuneo*; Teraoka, Yuden; Yokoya, Akinari; Yanagihara, Mihiro*

JAERI-Tech 2000-021, p.45 - 0, 2000/03

JAERI-Tech-2000-021.pdf:3.01MB

no abstracts in English

Journal Articles

Varied-line-spacing laminar-type holographic grating for the standard soft X-ray flat-field spectrograph

Koike, Masato; Namioka, Takeshi*; Gullikson, E. M.*; Harada, Yoshihisa*; Ishikawa, Sadayuki*; Imazono, Takashi*; Mrowka, S.*; Miyata, Noboru; Yanagihara, Mihiro*; Underwood, J. H.*; et al.

Soft X-Ray and EUV Imaging Systems (Proceedings of SPIE Vol.4146), p.163 - 170, 2000/00

no abstracts in English

Journal Articles

Time resolved measurement of laser-ablated particles by LAPXAS

Miyashita, Atsumi; Yoda, Osamu; *

Hyomen Kagaku, 20(3), p.180 - 185, 1999/00

no abstracts in English

Journal Articles

Surface structure of laser ablated C$$_{60}$$ pellet

Yoda, Osamu; Miyashita, Atsumi

Journal of Applied Physics, 75(10), p.5450 - 5452, 1994/05

 Times Cited Count:1 Percentile:88.37(Physics, Applied)

no abstracts in English

Journal Articles

XPS and optical absorption studies on $$alpha$$-Al$$_{2}$$O$$_{3}$$ and MgO single crystals implanted with Cr, Cu and Kr ions

*; Aoki, Yasushi; Yoda, Osamu; Nagai, Shiro

Nuclear Instruments and Methods in Physics Research B, 88, p.261 - 266, 1994/00

 Times Cited Count:19 Percentile:17.14

no abstracts in English

Journal Articles

A Laboratory scale apparatus for the time-resolved X-ray absorption spectroscopy using laser plasmas as an X-ray source

Yoda, Osamu; Miyashita, Atsumi; *; *; *; *

Japanese Journal of Applied Physics, 32(SUPPL.32-2), p.255 - 257, 1993/00

no abstracts in English

Journal Articles

XPS studies on the charge states of Cr and Cu atoms implanted into $$alpha$$-Al$$_{2}$$O$$_{3}$$ and MgO single crystals

*; Aoki, Yasushi; Yoda, Osamu; Nagai, Shiro; D.M.Rueck*

Nuclear Instruments and Methods in Physics Research B, 80-81, p.1168 - 1170, 1993/00

 Times Cited Count:3 Percentile:55.87

no abstracts in English

JAEA Reports

Dynamic behaviors of fragments ejected from the surface of carbon materials by laser ablation

Yoda, Osamu; Miyashita, Atsumi; *; *

JAERI-M 92-173, 27 Pages, 1992/10

JAERI-M-92-173.pdf:1.22MB

no abstracts in English

25 (Records 1-20 displayed on this page)