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Journal Articles

Radiation and spintronics

Ieda, Junichi

Hoshasen To Sangyo, (146), p.48 - 52, 2019/06

no abstracts in English

Journal Articles

Sample environment at the J-PARC MLF

Kawamura, Seiko; Oku, Takayuki; Watanabe, Masao; Takahashi, Ryuta; Munakata, Koji*; Takata, Shinichi; Sakaguchi, Yoshifumi*; Ishikado, Motoyuki*; Ouchi, Keiichi*; Hattori, Takanori; et al.

Journal of Neutron Research, 19(1-2), p.15 - 22, 2017/11

Sample environment (SE) team at the Materials and Life Science Experimental Facility (MLF) in J-PARC has worked on development and operation of SE equipment and devices. All the members belong to one sub-team at least, such as Cryogenic and magnet, High temperature, High pressure, Soft matter and special environment including Pulse magnet, Hydrogen environment, Light irradiation and $$^3$$He spin filter. Cryostats, a magnet, furnaces, a VX-6-type Paris-Edinburgh press and a prototype of a Spin-Exchange Optical Pumping (SEOP) based $$^3$$He spin filter for polarized neutron beam experiments are in operation. Furthermore, a prototype of compact power supply for a pulsed magnet system is currently developed. In the J-PARC Research Building, several pieces of equipment for softmatter research such as a rheometer and a gas and vapor adsorption measurement instrument have been prepared.

Journal Articles

Research and development using the quantum beams in Japan Atomic Energy Agency

Takeda, Masayasu

Hoshasen To Sangyo, (142), p.34 - 37, 2017/06

no abstracts in English

Journal Articles

Microstructure analysis in steel using quantum beam diffraction method

Sato, Shigeo*; Onuki, Yusuke*; Shobu, Takahisa; Shiro, Ayumi*; Tashiro, Hitoshi*; Todoroki, Hidekazu*; Suzuki, Shigeru*

Kinzoku, 86(8), p.654 - 660, 2016/08

no abstracts in English

Journal Articles

Development of grafted adsorbents for Cs removal from natural water source

Seko, Noriaki; Shibata, Takuya; Kasai, Noboru; Ueki, Yuji; Saiki, Seiichi; Hoshina, Hiroyuki

Hoshasen To Sangyo, (138), p.9 - 12, 2015/06

no abstracts in English

Journal Articles

Evaluation of the scandium affinity under the iron coexistence using radiation grafted adsorbents

Hayashi, Natsuki*; Hoshina, Hiroyuki; Amada, Haruyo; Yamanobe, Takeshi*; Seko, Noriaki

Nippon Ion Kokan Gakkai-Shi, 25(4), p.105 - 108, 2014/11

Journal Articles

Film growth method by means of ion beam sputtering

Yamaguchi, Kenji

Shirisaidokei Handotai No Kagaku To Gijutsu, p.113 - 121, 2014/09

This article describes first the basic aspects of sputtering phenomena based on ion beam - solid interactions, followed by introduction of ion beam sputter deposition (IBSD) method for thin film fabrication. The article further introduces the experimental apparatus for IBSD application, equipped with an ion beam irradiation system for sputter-etching of the substrate surface. It is shown that this method is suitable for fabrication of semiconducting iron silicide film on Si substrate. The experimental results revealed that the obtained thin film is highly-oriented and continuous, forming atomically flat interface between film and the substrate.

Journal Articles

Atomic level solid surface reactions and their analysis promoted by quantum beams

Urisu, Tsuneo*; Kitajima, Masahiro*; Teraoka, Yuden

Oyo Butsuri, 71(1), p.114 - 115, 2002/01

no abstracts in English

Oral presentation

Nanostructured proton-conductive membranes prepared by swift heavy ion irradiation for fuel cell applications

Yamaki, Tetsuya

no journal, , 

Researchers at Japan Atomic Energy Agency (JAEA) have been intensively working on quantum beam technology for the development of proton-conductive membranes for PEMFCs since 2001. My presentation deals with the application of high-energy heavy ion beams from the cyclotron accelerator of Takasaki Ion Accelerators for Advanced Radiation Application (TIARA), JAEA. Our strategic focus is centered on using nano-scale controllability of the ion-beam processing; the membrane preparation involves (1) the irradiation of commercially-available base polymer films with hundreds of MeV ions, (2) graft polymerization of vinyl monomers into electronically-excited parts along the ion trajectory, called latent tracks, and (3) sulfonation of the graft polymers. The resulting membranes were compared with those prepared by the conventional $$gamma$$-ray-induced grafting in terms of membrane nanostructures, proton conductivity, and other properties.

Oral presentation

Development of functional materials by using radiation grafting technique

Seko, Noriaki

no journal, , 

no abstracts in English

Oral presentation

Evaluation of fibrous grafted adsorbents under ferric ions coexistence

Hayashi, Natsuki*; Yamanobe, Takeshi*; Amada, Haruyo; Hoshina, Hiroyuki; Seko, Noriaki

no journal, , 

no abstracts in English

Oral presentation

Meaningful contribution of quantum beam to our lives

Tamada, Masao

no journal, , 

Takasaki advanced radiation research institute is a preeminent institute in the world since three irradiation research facilities of ion beam, electron beam, $$gamma$$ X-ray can be available. Industrial applications in the field of environment, energy, health care, and biotechnology have been researched for half over a century by means of radiation processing or quantum beam technology. We will intend to pioneer newly expected areas from society and aim at the technology transfer of our technology to end-users.

Oral presentation

Quantum beam technology; Catalytic materials prepared by ion beam irradiation for electrochemical device applications

Yamaki, Tetsuya; Kato, Sho*; Kimata, Tetsuya*; Yamamoto, Shunya; Hakoda, Teruyuki; Kobayashi, Tomohiro*; Suzuki, Akihiro*; Terai, Takayuki*

no journal, , 

We have a strong motivation to pursue the possibility of using ion beam technology for the creation of nano-structured catalytic materials and their electrochemical device applications. My talk includes (1) the preparation of noble-metal nanoparticles in a glassy carbon (GC) substrate by the metal-ion implantation method, (2) heavy-ion-induced lattice defects in the GC substrate and their effect on the oxygen reduction reaction activity of the deposited platinum nanoparticles, and (3) the formation of polymer nanostructures and their potential as a catalyst support.

Oral presentation

Yb:YAG thin-disk CPA laser system for intense THz pulse generation at 1 kHz repetition rate

Ochi, Yoshihiro; Nagashima, Keisuke; Maruyama, Momoko; Tsubouchi, Masaaki; Yoshida, Fumiko; Kono, Nanase; Sugiyama, Akira

no journal, , 

We have developed a high average power picosecond laser system dedicated to intense terahertz (THz) pulse generation. The system is a chirped pulse amplification laser equipping with a Yb:YAG thin-disk amplifier. The Yb:YAG thin-disk regenerative amplifier at room temperature provides pulses with energy over 10 mJ and spectral bandwidth of 1.2 nm at a repetition rate of 1 kHz. In a pulse compressor, the laser pulse is compressed to be 1.3 ps. By employing this picosecond pulse as a pump source, THz pulses at the center frequency of 0.3 THz with energy over a few microjoules have been generated at 1 kHz repetition rate by the optical rectification in Mg-LiNbO$$_{3}$$ crystal.

Oral presentation

Synchrotron radiation real time photoelectron spectroscopy study on oxidation of semiconductor surfaces

Yoshigoe, Akitaka

no journal, , 

In this lecture, I present applications of quantum beams for leading-edge reseraches through our studies on semiconductor surface oxidation analyzed by real time photoelectron spectroscopy using synchrotron radiation, which has been conducted at JAEA soft X-ray beamline in SPring-8.

Oral presentation

Muon knight shift in Sr$$_2$$RuO$$_4$$

Higemoto, Wataru; Ito, Takashi; Yoshida, Yoshiyuki*; Baines, C.*

no journal, , 

It is believed that spin triplet superconductivity is realized in Sr$$_2$$RuO$$_4$$. However, there are some objections for the spin triplet superconductivity. The spin triplet superconductivity is suggested mainly from NMR Knight shift measurements. Different form NMR, muon gives us the information completely inside the specimen. In our presentation, we report on the muon Knight shift measurement in Sr$$_2$$RuO$$_4$$.

18 (Records 1-18 displayed on this page)
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