Search

Your search keyword '"Kawabata, Yuji"' showing total 235 results
Start Over Author "Kawabata, Yuji"
235 results on '"Kawabata, Yuji"'

51. Preface

Author

Kawabata, Yuji

Published
2016

56. Preface

Author

Kawabata, Yuji

Published
2015

57. Possibility of the component analysis for sugar cane juice using Near Infra-Red

Author

Ueno, Masami, Kawamitsu, Yoshinobu, Kawabata, Yuji, and Taira, Eizo

Abstract

The purpose of this study was to analyze the components of sugar cane juice in order to improve the cultivation manner and to achieve high yield, high quality and low input of fertilizer. Whether the Near Infra-Red analyzer could employ to realize it was mainly focused. Chemical analyses of the juice components were carried out by a ICP, an ionic chromatography and liquid chromatography in order to make calibration equations and to check the accuracy of these. Totally, 135 samples of cane juice gathered from Minami Daito Island and University Experiment Farm were supplied. It was statistically confirmed that the components, sucrose, glucose, P, K, Mg, S, Si, fructose, Na were able to analyze with a certain level of accuracy. The analysis for Al, B, Fe, Ca, Mn, Mo was difficult., 論文

Published
2000

59. Observation of hydrazine decomposition in the mono-propellant catalyst thruster

Author

Kagawa, Hideshi, Nagata, Taiichi, Masuoka, Tadashi, Kajiwara, Kenichi, Ito, Daisuke, Saitoh, Yasushi, and Kawabata, Yuji

Subjects
Neutron radiography, KUR, Catalyst bed, Hydrazine decomposition
Abstract

第56回宇宙科学技術連合講演会（2012年11月20日-22日. 別府国際コンベンションセンター（ビーコンプラザ）), 別府市, 大分県, 資料番号: ARDS12104000

Published
2012

61. Hybrid Two-phase Flow Measurements in a Narrow Channel Using Neutron Radiography and Liquid Film Sensor

Author

30630024, 40283684, 00224840, Ito, Daisuke, Saito, Yasushi, Kawabata, Yuji, 30630024, 40283684, 00224840, Ito, Daisuke, Saito, Yasushi, and Kawabata, Yuji

Abstract

Gas-liquid two-phase flow in a narrow gap has been studied to develop a solid target cooling system for an accelerator driven system. Flow measurements are important to understand two-phase flow dynamics also in such a narrow channel. Although contact methods can measure detailed structure of two-phase flow, the intrusive effect on the flow becomes relatively larger in such a small channel. Therefore, non-intrusive measurement would be desirable. Neutron radiography (NRG) is one of the powerful tools for gas-liquid two-phase flow measurement and void fraction distribution can be estimated from the acquired images. However, the temporal resolution of NRG is about 100∼1, 000 Hz depending on the neutron flux and it should be increased to investigate flow dynamics. So the authors focused on a hybrid measurement of the NRG and a conductance liquid film sensor (LFS). The combination of these methods can complement the spatial and temporal information of the flow. In this study, the hybrid measurements were performed by NRG and LFS to visualize the detailed structure of narrow two-phase flow.

Published
2015

62. Visualization of Hydrazine Decomposition in a Catalyst Bed by Using Neutron Radiography

Author

30630024, 40283684, 00224840, Ito, Daisuke, Saito, Yasushi, Kagawa, Hideshi, Nagata, Taiichi, Masuoka, Tadashi, Ikeda, Hirohide, Kawabata, Yuji, 30630024, 40283684, 00224840, Ito, Daisuke, Saito, Yasushi, Kagawa, Hideshi, Nagata, Taiichi, Masuoka, Tadashi, Ikeda, Hirohide, and Kawabata, Yuji

Abstract

Most mono-propellant thruster technologies were developed in the 1960s. Those basic principles and fundamental mechanisms, such as the catalyst and propellant, are still in use without major technical innovation. However, much remains to be clarified in terms of the mechanisms and quantitative limitations of the hydrazine decomposition phenomena inside the mono-propellant thruster. Therefore, in order to enhance the reliability of the propulsion systems, it should be promising to perform the direct observation of the physical and chemical phenomena occurring in the catalyst bed of the mono-propellant thruster. For that purpose, a visualization of the mono-propellant thruster was performed by using high frame-rate neutron radiography technique. The experiments were conducted at the Kyoto University Research Reactor and the hydrazine injection behavior to the catalyst bed was visualized clearly.

Published
2015

63. The ion beam sputtering facility at KURRI: Coatings for advanced neutron optical devices

Author

70314292, 70782308, 40197348, 00224840, Hino, Masahiro, Oda, Tatsuro, Kitaguchi, Masaaki, Yamada, Norifumi L., Tasaki, Seiji, Kawabata, Yuji, 70314292, 70782308, 40197348, 00224840, Hino, Masahiro, Oda, Tatsuro, Kitaguchi, Masaaki, Yamada, Norifumi L., Tasaki, Seiji, and Kawabata, Yuji

Abstract

We describe a film coating facility for the development of multilayer mirrors for use in neutron optical devices that handle slow neutron beams. Recently, we succeeded in fabricating a large neutron supermirror with high reflectivity using an ion beam sputtering system (KUR-IBS), as well as all neutron supermirrors in two neutron guide tubes at BL06 at J-PARC/MLF. We also realized a large flexible self-standing m=5 NiC/Ti supermirror and very small d-spacing (d=1.65 nm) multilayer sheets. In this paper, we present an overview of the performance and utility of non-magnetic neutron multilayer mirrors fabricated with the KUR-IBS

Published
2015

66. A study on reflectivity limit of neutron supermirror

Author

70314292, 40197348, 00224840, Hino, Masahiro, Kitaguchi, Masaaki, Hayashida, Hirotoshi, Tasaki, Seiji, Ebisawa, Toru, Maruyama, Ryuji, Achiwa, Norio, Kawabata, Yuji, 70314292, 40197348, 00224840, Hino, Masahiro, Kitaguchi, Masaaki, Hayashida, Hirotoshi, Tasaki, Seiji, Ebisawa, Toru, Maruyama, Ryuji, Achiwa, Norio, and Kawabata, Yuji

Published
2009

69. Shield evaluation of cold neutron curved guide tubes for J-PARC neutron resonance spin echo spectrometers

Author

40197348, 80378794, 70314292, 00224840, Ebisawa, Toru, Soyama, Kazuhiko, Yamazaki, Dai, Maruyama, Ryuji, Tasaki, Seiji, Abe, Yutaka, Hayashida, Hiroyuki, Hino, Masahiro, Kitaguchi, Masaaki, Kawabata, Yuji, Niita, Koji, 40197348, 80378794, 70314292, 00224840, Ebisawa, Toru, Soyama, Kazuhiko, Yamazaki, Dai, Maruyama, Ryuji, Tasaki, Seiji, Abe, Yutaka, Hayashida, Hiroyuki, Hino, Masahiro, Kitaguchi, Masaaki, Kawabata, Yuji, and Niita, Koji

Published
2009

77. Development of thermal neutron flux monitor using small scintillator array coupled with quartz fibers for Boron Neutron Capture Therapy

Author

Tanaka, Hiroki, primary, Sakurai, Yoshinori, additional, Suzuki, Minoru, additional, Masunaga, Shinichiro, additional, Kinashi, Yuko, additional, Kondo, Natsuko, additional, Kawabata, Yuji, additional, Yagi, Takahiro, additional, Misawa, Tsuyoshi, additional, Ono, Koji, additional, and Maruhashi, Akira, additional

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results