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Oku, Takayuki; Suzuki, Junichi; Sasao, Hajime*; Yamada, Satoru; Furusaka, Michihiro*; Adachi, Tomohiro*; Shinohara, Takenao*; Ikeda, Kazuaki*; Shimizu, Hirohiko
Physica B; Condensed Matter, 356(1-4), p.126 - 130, 2005/02
Times Cited Count：11 Percentile：45.47(Physics, Condensed Matter)We have developed a magnetic neutron lens (MNL) based on a sextupole magnet. A neutron beam, which is incident to the sextupole magnet, either converges or diverges depending on the neutron spin state. Small-angle neutron scattering in focusing geometry (FSANS) was proposed to improve the q-resolution and/or measuring efficiency. The MNL is considered to be the most suitable focusing device for FSANS experiments using a polarized neutron beam, since it focuses the polarized neutron beam free from neutron attenuation and scattering by substances. Recently, we have developed the MNLs with sufficiently large apertures and strong focusing power for FSANS experiments. In this study, we evaluate the focusing property of the MNLs for the polarized neutron beam, and performed FSANS experiments using the MNL. The obtained results are discussed.
Oku, Takayuki; Suzuki, Junichi; Sasao, Hajime*; Adachi, Tomohiro*; Shinohara, Takenao*; Ikeda, Kazuaki*; Morishima, Takahiro*; Sakai, Kenji*; Kiyanagi, Yoshiaki*; Furusaka, Michihiro*; et al.
Nuclear Instruments and Methods in Physics Research A, 529(1-3), p.116 - 119, 2004/08
Times Cited Count：21 Percentile：77.78(Instruments & Instrumentation)As a neutron has a magnetic dipole moment, it is accelerated in a magnetic field gradient. Thus, we can control a neutron trajectory free from neutron beam attenuation and scattering using the magnetic field gradient. A sextupole magnetic field functions as a neutron focusing and defocusing lens depending on the neutron spin state. The neutron focusing effect was experimentally verified using a 6-piece permanent sextupole magnet. For the application in practical neutron scattering experiments, a sextupole magnet with a sufficiently large aperture accompanied with strong focusing power is demanded. Recently, a superconducting sextupole magnet, a Halbach-type permanent sextupole magnet and a sextupole pulse electro-magnet have been developed in a project of the development and application of neutron optics. These magnets will be dedicated to practical uses in neutron scattering experiments. In this paper, current status of the development of the magnetic neutron lenses is reported, and their application in the neutron scattering experiments is discussed.
Adachi, Hajime; Tamura, Koji; Ogura, Koichi; Shibata, Takemasa
Japanese Journal of Applied Physics, 38(12A), p.6887 - 6889, 1999/12
Times Cited Count：4 Percentile：23.78(Physics, Applied)no abstracts in English
Tamura, Koji; Adachi, Hajime*; Ogura, Koichi; Oba, Hironori; Shibata, Takemasa
Japanese Journal of Applied Physics, Part 1, 38(11), p.6512 - 6516, 1999/11
Times Cited Count：12 Percentile：50.95(Physics, Applied)no abstracts in English
Tamura, Koji; Adachi, Hajime; Shibata, Takemasa
Japanese Journal of Applied Physics, Part 1, 38(5A), p.2973 - 2977, 1999/05
Times Cited Count：6 Percentile：32.55(Physics, Applied)no abstracts in English
Tamura, Koji; ; Adachi, Hajime; Oba, Hironori; Shibata, Takemasa
Japanese Journal of Applied Physics, Part 1, 38(4A), p.2122 - 2123, 1999/04
Times Cited Count：9 Percentile：42.98(Physics, Applied)no abstracts in English
Adachi, Hajime; Tamura, Koji; ; Ogura, Koichi; Oba, Hironori; Shibata, Takemasa
JAERI-Research 99-029, 19 Pages, 1999/03
JAERI-Research-99-029.pdf:0.94MB
no abstracts in English
Tamura, Koji; ; Adachi, Hajime; Oba, Hironori; Shibata, Takemasa
JAERI-Research 98-073, 10 Pages, 1998/12
JAERI-Research-98-073.pdf:0.52MB
no abstracts in English
Tamura, Koji; ; Adachi, Hajime; Shibata, Takemasa; Oba, Hironori
Japanese Journal of Applied Physics, Part 1, 37(12A), p.6651 - 6654, 1998/12
Times Cited Count：0 Percentile：0(Physics, Applied)no abstracts in English
Adachi, Hajime; Tamura, Koji; ; Shibata, Takemasa
JAERI-Tech 98-029, 32 Pages, 1998/08
no abstracts in English
; Tamura, Koji; Adachi, Hajime; Oba, Hironori; *; Shibata, Takemasa
JAERI-Tech 98-020, 17 Pages, 1998/06
no abstracts in English
Adachi, Hajime; Tamura, Koji; ; Shibata, Takemasa
JAERI-Research 98-030, 29 Pages, 1998/06
JAERI-Research-98-030.pdf:1.22MB
no abstracts in English
Tamura, Koji; Adachi, Hajime; Shibata, Takemasa
JAERI-Research 98-020, 13 Pages, 1998/03
JAERI-Research-98-020.pdf:0.66MB
no abstracts in English
Adachi, Hajime; Tamura, Koji; Ogura, Koichi; Shibata, Takemasa
JAERI-Research 98-014, 20 Pages, 1998/03
JAERI-Research-98-014.pdf:0.76MB
no abstracts in English
Tamura, Koji; Adachi, Hajime; ; Shibata, Takemasa
Proc. of 6th Workshop on Separation Phenomena in Liquids and Gases (SPG'98), p.219 - 230, 1998/00
no abstracts in English
Tamura, Koji; Adachi, Hajime; Shibata, Takemasa
Shinku, 41(3), p.332 - 334, 1998/00
no abstracts in English
Ishii, Tatsuya*; Sueki, Keisuke*; Matsuo, Kazuki*; Kurosawa, Masanori*; Satou, Yukihiko; Kobata, Masaaki; Fukuda, Tatsuo; Yoshii, Kenji; Tanida, Hajime; Okane, Tetsuo; et al.
no journal, ,
Radioactive particles were released into the environment by the accident of Fukushima Daiichi Nuclear Power Plant (FDNPP). They have information to understand the inside of the reactor during the accident. Now, nobody knows the generation process of radioactive particles. In this study, we analyzed (1) elements of particles' cross section with SEM-EDS to reveal what is the material and (2) chemical states of elements on particles' surface with HAXPES. (1) Radioactive particles are composed of the two parts. One is the basic material and the other is the heavy elemental materials. We considered the basic material was soda-lime glass and the heavy elemental materials included lead glass. (2) HAXPES brought out that the chemical states of Cs on particles, surface was different in the Na-poor areas and the Na-rich areas. In the Na-poor areas, the chemical state of Cs showed CsFeSiO
mainly, but zero valence partly. In the Na-rich areas, the chemical state of Cs couldn't be identified. For above analyses, we can reveal the generation process of radioactive particles.
