Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Hakoda, Teruyuki; Kojima, Takuji
Radiation Physics and Chemistry, 74(5), p.302 - 309, 2005/12
Times Cited Count：0 Percentile：0.01(Chemistry, Physical)no abstracts in English
Hirota, Koichi; Kojima, Takuji
Bulletin of the Chemical Society of Japan, 78(9), p.1685 - 1690, 2005/09
Times Cited Count：7 Percentile：31.71(Chemistry, Multidisciplinary)Decomposition behavior under electron-beam irradiation was examined for polychlorinated dibenzo-p-dioxin (PCDD) and polychlorinated dibenzofuran (PCDF) isomers in incinerator gases. Significant decomposition was obtained for all PCDD isomers over the investigated absorbed doses, which was resulted from oxidation reactions with OH radicals yielded by electron-beam irradiation. In the case of PCDFs, specific isomers having symmetrical structures such as 1, 2, 8, 9-, 2, 3, 7, 8-, and 3, 4, 6, 7-TeCDFs were yielded through the dechlorination of PeCDF isomers. Thermal electrons probably played a role in the dechlorination of PeCDF isomers.
Sato, Susumu; Tomisawa, Tetsuo; Akikawa, Hisashi; Ueno, Akira; Lee, S.*; Igarashi, Zenei*; Ikegami, Masanori*; Toyama, Takeshi*; Kamikubota, Norihiko*
Proceedings of 2005 Particle Accelerator Conference (PAC '05) (CD-ROM), p.2777 - 2779, 2005/00
The J-PARC LINAC requires for fine control of beam position to minimize beam loss. So that BPMs need to be calibrated with the accuracy of about a hundred micro-meters. The accuracy of BPMs are calibrated with the calibration tool and real beam. In this paper, details of these developments around BPMs are to be reported.
Kojima, Takuji
Shinku, 47(11), p.789 - 795, 2004/11
When flue gas/off gas is irradiated by EB, many free radicals such as OH and active oxygen atom are formed from major components of air: namely nitrogen, oxygen, water and carbon dioxide ecules. The similer reaction can be achieved using UV light and plasma-discharging, but ionizing radiations produce such free radicals at higher density. Such radiation-induced radicals react efficiently with air pollutants, SOx and NOx in coal/oil combustion flue gas at thermal power plants, dioxins in waste incineration flue gas and volatile organic compounds (VOC) even in very low concentration and decompose them into non-toxic substances or change them to removable substances. R & D on EB treatment of flue gas/off gas done in JAERI on the basis of this principle process, as an example, is described in the present paper.
Baba, Yuji; Sekiguchi, Tetsuhiro; Shimoyama, Iwao; Nath, K. G.
Applied Surface Science, 237(1-4), p.176 - 180, 2004/10
Times Cited Count：9 Percentile：43.95(Chemistry, Physical)no abstracts in English
Hirota, Koichi; Sakai, Hiroki*; Washio, Masakazu*; Kojima, Takuji
Industrial & Engineering Chemistry Research, 43(5), p.1185 - 1191, 2004/03
Times Cited Count：46 Percentile：79.38(Engineering, Chemical)Twenty volatile organic compounds (VOCs) were irradiated with electron beams in laboratory scale to obtain an electron-beam energy required for a 90% treatment. The experiments showed that the energy was related with the chemical structure and roughly estimated from rate constants for reactions with OH radicals. The cost analysis revealed that the unification of a self-shielding electron accelerator with a reactor could reduce the capital cost for an electron-beam system. Electron-beam technology is a promising method for the treatment of VOCs.
-FeSi
filmsIgarashi, Shinichi; Katsumata, Toshinobu; Haraguchi, Masaharu; Saito, Takeru; Yamaguchi, Kenji; Yamamoto, Hiroyuki; Hojo, Kiichi
Transactions of the Materials Research Society of Japan, 28(4), p.1153 - 1156, 2003/12
We have evaluated the crystal structure of the -FeSi films formed with various sputter etching of Si substrate. Ne
sputter etching of Si (100) substrate was performed with ion energies of 1, 3, and 10 keV. After each etching, the substrate was annealed at a temperature of 1073 K for 30 min. The -FeSi films of 100 nm in thickness were formed at 973 K with the amount of deposited Fe, 30 nm. X-ray diffraction revealed that these films have polycrystalline -FeSi structure but strong preferential orientation aligned as -FeSi (100) // Si (100). Furthermore, the oriented structure of the film was improved by lowering the incident energy of Ne.
Meigo, Shinichiro; Harada, Masahide; Teraoku, Takuji*; Maekawa, Fujio
Proceedings of ICANS-XVI, Volume 3, p.1175 - 1180, 2003/07
It is important to monitor the proton beam for the high intensity pulse spallation target. Especially for the beam halo, which may irradiate the bulk surrounding the target, it is important to be observed to prevent causing heat spot in the shielding bulk. At JSNS, a proton beam monitors are located at front of the target. These monitors are assembled with the proton beam window. Since this scheme increases the radiation on the monitor due to the beam loss at the windows, it may arise heat deposition on the monitor. Therefore, heat deposition is calculated with NMTC/JAM. It is found that the heat deposition for normal operation is less than 0.1 W/cc.
Kojima, Takuji
Oyo Butsuri, 72(4), p.405 - 414, 2003/04
The advanced technologies are required to control pollutants e.g. dioxins in gas or water at extremely low concentration. The present paper introduces typical basic studies, developments of control technologies, and example of their industrial applications of electron beam technology having the features of oxidation, decomposition and detoxifying of such pollutants even at low concentration. It covers removal of SOx and NOx from coal-combustion flue gas, decomposition of gaseous volatile organic compound in off gas and dioxins in incineration flue-gas, purification of tap and wastewaters, and treatment of sewage/sludge.
Kojima, Takuji; Hirota, Koichi; Taguchi, Mitsumasa; Hakoda, Teruyuki; Takigami, Machiko
Proceedings of 25th JAIF-KAIF Seminar on Nuclear Industry, p.193 - 201, 2003/00
The electron beam technology for decomposition/elimination of dioxin contained in flue gas has been developed using real waste gas of 1,000 m
N/h released from the municipal solid waste incineration facility at 200
C. The decomposition efficiency, the ratio of toxic equivalent dioxin concentration before and after EB irradiation to doses above 15kGy is higher than 90%, which clears the regulation limit in the Japanese special measures of dioxin release. The chemical process of dioxin decomposition was studied and low-toxicity of irradiated gas was confirmed in terms of endocrine disrupter influence.
Hirota, Koichi; Hakoda, Teruyuki; Taguchi, Mitsumasa; Takigami, Machiko*; Kojima, Takuji
Proceedings of 9th International Conference on Radiation Curing (RadTech Asia '03) (CD-ROM), 4 Pages, 2003/00
The flue gas from a municipal solid waste incinerator (MSWI) was irradiated with electron beams to destroy polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs). A flue gas of 1,000 m/h N for the irradiation was obtained at 200
C from a main gas stream of the MSWI. The decomposition efficiencies of PCDD/Fs were increased with absorbed dose and reached 90% at a dose of 14 kGy. The reaction mechanisim for PCDD/Fs was also considered.
Zhu, X. D.; Naramoto, Hiroshi; Xu, Y.; Narumi, Kazumasa; Miyashita, Kiyoshi*
Physical Review B, 66(16), p.165426_1 - 165426_5, 2002/10
Times Cited Count：14 Percentile：57.54(Materials Science, Multidisciplinary)no abstracts in English
Naramoto, Hiroshi; Xu, Y.; Narumi, Kazumasa; Vacik, J.; Zhu, X.; Yamamoto, Shunya; Miyashita, Kiyoshi*
Materials Research Society Symposium Proceedings, Vol.647, p.O5.18.1 - O5.18.16, 2001/00
no abstracts in English
Nose, Tadao*; Matsumura, Akira*; Yamamoto, Tetsuya*; Shibata, Yasushi*; Yoshida, Fumiyo*; Akutsu, Hiroyoshi*; Yasuda, Susumu*; Matsushita, Akira*; Nakai, Kei*; Yamada, Takashi*; et al.
UTRCN-G-29, p.114 - 123, 2001/00
no abstracts in English
Hirota, Koichi; Arai, Hidehiko; Hashimoto, Shoji
Bulletin of the Chemical Society of Japan, 73(12), p.2719 - 2724, 2000/12
Times Cited Count：7 Percentile：38.34(Chemistry, Multidisciplinary)no abstracts in English
Wahyuni, S.*; Hirota, Koichi; Hakoda, Teruyuki; Arai, Hidehiko; Hashimoto, Shoji; Kawamoto, Fumio*; Mukunoki, Yasuo*
Bulletin of the Chemical Society of Japan, 73(8), p.1939 - 1943, 2000/08
Times Cited Count：2 Percentile：16.95(Chemistry, Multidisciplinary)no abstracts in English
Kikuchi, Kenji; Nakashima, Hiroshi; Ishikura, Shuichi*; Futakawa, Masatoshi; Hino, Ryutaro
Journal of the Physical Society of Japan, 37(2), p.113 - 119, 2000/02
no abstracts in English
Nishimura, Akihiko; ; Oba, Hironori; Shibata, Takemasa
Journal of Nuclear Science and Technology, 30(3), p.270 - 273, 1993/03
Times Cited Count：13 Percentile：84.31(Nuclear Science & Technology)no abstracts in English
Kawanishi, Shunichi; Shimizu, Yuichi; Sugimoto, Shunichi; Suzuki, Nobutake
Polymer, 32(6), p.979 - 983, 1991/00
Times Cited Count：11 Percentile：52.84(Polymer Science)no abstracts in English
; Ono, Shinichi
Bulletin of the Chemical Society of Japan, 58, p.1831 - 1832, 1985/00
Times Cited Count：1 Percentile：22.47(Chemistry, Multidisciplinary)no abstracts in English
