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Agui, Akane; Kurachi, Toshitaka*; Sakurai, Hiroshi*; Tamura, Takuro*; Tanaka, Masahito*; Koizumi, Akihisa*; Kawata, Hiroshi*; Adachi, Hiromichi*
no journal, ,
no abstracts in English
Shobu, Takahisa; Konishi, Hiroyuki
no journal, ,
no abstracts in English
Okajima, Yuka; Yoneda, Yasuhiro; Nisawa, Atsushi*; Yamamoto, Masaki*; Goto, Shunji*
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no abstracts in English
Hirao, Norie*; Baba, Yuji; Sekiguchi, Tetsuhiro; Shimoyama, Iwao; Honda, Mitsunori; Narita, Ayumi
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no abstracts in English
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studied by resonant inelastic X-ray scatteringIshii, Kenji; Ikeuchi, Kazuhiko; Inami, Toshiya; Mizuki, Junichiro; Tsutsui, Kenji; Toyama, Takami*; Maekawa, Sadamichi*; Kudo, Kazutaka*; Koike, Yoji*; Murakami, Yoichi*; et al.
no journal, ,
no abstracts in English
Yaita, Tsuyoshi; Shuk, D. K.*; Shiwaku, Hideaki; Okamoto, Yoshihiro
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no abstracts in English
Hajima, Ryoichi; Nagai, Ryoji; Iijima, Hokuto; Nishimori, Nobuyuki
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We are developing an electron gun for future ERL light sources, which produces coherent X-ray and femto-second X-ray. The gun is a 250-kV DC gun equipped with a semiconductor photo cathode. We present recent results of the gun development including stabilization of the DC high-voltage circuit, assembling of vacuum chambers, design and construction of solenoid magnet and so on.
Sakanaka, Shogo*; Kobayashi, Yukinori*; Hajima, Ryoichi; Nakamura, Norio*
no journal, ,
A collaborative effort towards a future ERL light source is carried out by JAEA, KEK and ISSP. We present recent results of the ERL project, which includes development of ERL components and design studies of a compact ERL.
Shiwaku, Hideaki; Yaita, Tsuyoshi; Okamoto, Yoshihiro; Narita, Hirokazu*; Tanida, Hajime*
no journal, ,
no abstracts in English
studied by angle-resolved soft X-ray photoemission spectroscopyOkochi, Takuo; Fujimori, Shinichi; Toshimitsu, Takafumi; Okane, Tetsuo; Saito, Yuji; Fujimori, Atsushi*; Yamagami, Hiroshi*; Haga, Yoshinori; Yamamoto, Etsuji; Ikeda, Shugo; et al.
no journal, ,
We investigated the temperature dependence of the density of states and the band structure of ferromagnetic uranium compound, UIr, by the soft X-ray angle integrated / resolved photoemission spectroscopy. We observed the exchange splitting of the density of states as well as the representative 5
band. These results suggest that the ferromagnetism of UIr is well explained by the Stoner model (itinerant-magnetism model).
Sakai, Hiroshi*; Shinoe, Kenji*; Umemori, Kensei*; Sakanaka, Shogo*; Suwada, Tsuyoshi*; Takahashi, Takeshi*; Furuya, Takaaki*; Sawamura, Masaru
no journal, ,
Development for energy-recovery linacs (ERLs) of the next generation light sources has begun in 2006. Superconducting cavities for the main linac is one of the essential technologies. The main linac has to accelerate and decelerate the high current beam of 100 mA stably. We present the design and development of the input couplers for the main linacs.
Umemori, Kensei*; Sakai, Hiroshi*; Sakanaka, Shogo*; Sawamura, Masaru; Shinoe, Kenji*; Suwada, Tsuyoshi*; Takahashi, Takeshi*; Furuya, Takaaki*
no journal, ,
We have been developing a 1.3-GHz superconducting cavity which is one of the essential components for energy-recovery linacs (ERLs). The ERL requires the accelerating gradient of 15-20 MV/m and CW beam operation of 100 mA. Damping of higher order modes is important for high current beam accelerators such as ERLs. We designed a new cavity of large iris diameter, ellipsoidal shape of equator and large beam pipe diameter to reduce the impedance of dipole modes. We also proposed eccentric-fluted beam pipe to damp quadrupole modes. The model cavities were manufactured and surface-treated. We report results of vertical measurement.
Yamada, Hidetaka; Murakami, Hiroshi; Shimada, Yukihiro
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no abstracts in English
Imazono, Takashi; Suzuki, Yoji; Sano, Kazuo*; Koike, Masato
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no abstracts in English
Numakura, Masahiko; Okamoto, Yoshihiro; Yaita, Tsuyoshi; Shiwaku, Hideaki; Suzuki, Shinichi; Kobayashi, Toru; Akutsu, Kazuhiro; Matsuura, Haruaki*
no journal, ,
The high energy XAFS using K-absorption edge is very effective to obtain information on behavior of small amount of rare earth elements in molten chlorides. In the present study, we performed the XAFS measurement to obtain the local structure change for molten TbCl
and the mixture of 40% TbCl with LiCl-KCl eutectic, 15% TbCl with LiCl-KCl eutectic and 1.5% TbCl with LiCl-KCl eutectic. We found that as the concentration of TbCl is lower, the coordination number decrease a little and become near 6 but the nearest Tb-Cl distance is almost same. In addition, we found that Debye-Waller factor become very small. We also performed molecular dynamics simulation to obtain the information of structure change. This simulation showed the intense structure change occurs at vicinity of 25% TbCl with LiCl-KCl eutectic. Its simulation result accorded with this XAFS experiment result.
ssbauer spectrometer using nuclear monochromatorMitsui, Takaya; Seto, Makoto; Masuda, Ryo
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no abstracts in English
Koike, Masato; Imazono, Takashi; Sano, Kazuo*; Sasai, Hiroyuki*
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The grate demands for emission spectroscopy have been occurred from synchrotron radiations and soft X-ray laser lights research as well as the nano-scale characterizations by use of transmission electron microscopes. To perform these experiments it is necessary to develop high efficiency spectrographs optimized for emission and florescence analysis in a 1-3 keV region. We have developed a flat-field laminar-type Au-coated holographic grating and succeeded to observe an emission band in 1.7keV region at the incidence angle of 88.65 deg. However, its diffraction efficiency is 
1% in the region. Therefore we have developed the multilayered gratings to improve diffraction efficiency dramatically in a 1-3 keV region. In this paper we describe the Mo/SiO multilayered gratings (grating constant: 2400 lines/mm) for a flat-field spectrograph.
Baba, Yuji; Sekiguchi, Tetsuhiro; Shimoyama, Iwao; Honda, Mitsunori; Hirao, Norie*; Deng, J.
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no abstracts in English
Izumi, Yudai*; Kamohara, Masumi*; Tanaka, Masafumi*; Imazu, Akiko*; Mimoto, Aki*; Nakagawa, Kazumichi*; Tanaka, Masahito*; Agui, Akane; Muro, Takayuki*; Matsushita, Tomohiro*
no journal, ,
no abstracts in English
Kiriyama, Koji; Shibano, Junichi*; Nishimura, Suguru*; Shobu, Takahisa; Kaneko, Hiroshi; Kajiwara, Kentaro*; Suzuki, Kenji*
no journal, ,
no abstracts in English