Transport calculation for upgrading of the C2 cold neutron guide at JRR-3

Tamura, Itaru; Kaneko, Koji; Yamauchi, Hiroki; Wakimoto, Shuichi

no journal, , 

no abstracts in English

Neutron diffractometer for protein crystal covering large-unit-cell crystal at J-PARC

Kurihara, Kazuo; Tomoyori, Katsuaki; Tamada, Taro; Kuroki, Ryota

no journal, , 

Molecular interaction study based on structural analysis of proteins like membrane proteins and protein complexes are an important research field in recent biological science. However, many of the target proteins have larger molecular weight and then unit cells of their crystals have larger volume, which is out of range of measurable unit cell volume for conventional diffractometers for neutron protein crystallography. Therefore, our group had designed the diffractometer which is able to cover such a crystal with large unit cell volume (target lattice length: 250). This proposal was accepted by Neutron Instrument Program Review Committee of J-PARC in September 2012. Larger unit cell volume causes a problem to separate spots closer to each other in spatial and time distribution in diffraction images. Therefore, our proposed diffractometer adopts longer camera distance (800 mm) and decoupled moderator as neutron source which has shorter pulse width. For covering large neutron detecting area due to long camera distance large-area detector ( 300 mm 300 mm) will be developed in collaboration with Neutron Instrumentation Section in J-PARC center. The gain factor of this diffractometer is estimated to be about 20 or larger as compared with BIX-3/4 diffractometers in JRR-3 at JAEA.

Development of an in-situ SEOP He spin filter

Hayashida, Hirotoshi; Oku, Takayuki; Kira, Hiroshi*; Sakai, Kenji; Ino, Takashi*; Shinohara, Takenao; Oyama, Kenji*; Takata, Shinichi; Oishi, Kazuki*; Takeda, Masayasu; et al.

no journal, , 

no abstracts in English

Callibration and accuracy of the pulsed neutron single crystal diffractometer SENJU

Kiyanagi, Ryoji; Noda, Yukio*; Ohara, Takashi; Kawasaki, Takuro; Oikawa, Kenichi; Kaneko, Koji; Tamura, Itaru; Hanashima, Takayasu*; Moyoshi, Taketo*; Nakao, Akiko*; et al.

no journal, , 

no abstracts in English

Bulk texture evaluation using iMATERIA time-of-flight neutron diffraction

Xu, P. G.; Hoshikawa, Akinori*; Ishigaki, Toru*; Suzuki, Tetsuya*; Akita, Koichi; Morii, Yukio*; Hayashi, Makoto*; Lutterotti, L.*

no journal, , 

A Discussion for the dispersion/aggregation of silica or carbon black particles

Yamaguchi, Daisuke; Yuasa, Takeshi*; Sone, Takuo*; Tominaga, Tetsuo*

no journal, , 

Using a combined ultra-small-angle and small-angle scattering (CSAS) method, we characterized hierarchical structures of silica and/or carbon black filler particles dispersed in solution polymerized poly(styrene-random-butadiene) rubber (SBR). Two types of SBR were employed for the preparation of filler/rubber compounds; one possesses a newly developed functionalized chain-end (f-SBR), which has an affinity for filler particles and the other is a conventional SBR (n-SBR) without any special interaction with fillers. CSAS measurements clarified that the average-size of aggregated fillers dispersed in f-SBR matrix is smaller than that dispersed in n-SBR matrix. In addition, those aggregated fillers either in f-SBR or in n-SBR exhibited their own mass-fractal dimensions in their higher-order structures.

Combined neutron scattering and weight measurement studies of structural changes in microbial cellulose during drying process

Zhao, Y.

no journal, , 

Temperature development of local lattice distortion in spinel compound LiMnO

Kodama, Katsuaki; Igawa, Naoki; Shamoto, Shinichi; Ikeda, Kazutaka*; Oshita, Hidetoshi*; Kaneko, Naokatsu*; Otomo, Toshiya*; Suzuya, Kentaro; Hoshikawa, Akinori*; Ishigaki, Toru*

no journal, , 

no abstracts in English

Development of model-free analysis method on quasielastic neutron scattering and application to water

Kikuchi, Tatsuya

no journal, , 

no abstracts in English

Development and application of an in-situ SEOP He neutron spin filter

Oku, Takayuki; Hayashida, Hirotoshi; Sakai, Kenji; Shinohara, Takenao; Nakamura, Mitsutaka; Aizawa, Kazuya; Arai, Masatoshi; Endo, Yasuo; Kakurai, Kazuhisa; Kira, Hiroshi*; et al.

no journal, , 

We have been developing an in-situ SEOP He neutron spin filter to apply it to pulsed neutron experiments at J-PARC/MLF. To introduce the He neutron spin filter into the instruments of the pulsed neutron facility such as J-PARC/MLF, it is important to make the system compact and stable, because the system is located inside thick and bulky radiation shields for high energy ray and neutrons. In this study, we have developed a compact laser optics with a volume holographic grating (VHG) element, and composed an in-situ SEOP He neutron spin filter. We have started to apply the He spin filer as an analyzer to polarized neutron small angle scattering and reflection measurements. A magnetic field imaging are also being tested with the two He neutron spin filter cells which are polarized by the ex-situ SEOP technique. In this paper, we report the design of our SEOP He neutron spin filter system and some results of the related polarized neutron beam experiments.