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Ishizawa, Akihiro*; Idomura, Yasuhiro; Imadera, Kenji*; Kasuya, Naohiro*; Kanno, Ryutaro*; Satake, Shinsuke*; Tatsuno, Tomoya*; Nakata, Motoki*; Nunami, Masanori*; Maeyama, Shinya*; et al.
Purazuma, Kaku Yugo Gakkai-Shi, 92(3), p.157 - 210, 2016/03
The high-performance computer system Helios which is located at The Computational Simulation Centre (CSC) in The International Fusion Energy Research Centre (IFERC) started its operation in January 2012 under the Broader Approach (BA) agreement between Japan and the EU. The Helios system has been used for magnetised fusion related simulation studies in the EU and Japan and has kept high average usage rate. As a result, the Helios system has contributed to many research products in a wide range of research areas from core plasma physics to reactor material and reactor engineering. This project review gives a short catalogue of domestic simulation research projects. First, we outline the IFERC-CSC project. After that, shown are objectives of the research projects, numerical schemes used in simulation codes, obtained results and necessary computations in future.
Nishikino, Masaharu; Ishino, Masahiko; Ichimaru, Satoshi*; Hatayama, Masatoshi*; Hasegawa, Noboru; Kawachi, Tetsuya
Reza Gakkai Dai-483-Kai Kenkyukai Hokoku; Tanhacho Ryoshi Bimu Hassei To Sono Oyo, p.25 - 28, 2015/12
X-ray ablation has been recently achieved using plasma soft X-ray lasers (SXRLs), laser plasma soft X-rays, and X-ray free electron lasers. In order to study the interactions between picosecond SXRL beams and material and multi-layered structure surfaces were irradiated with SXRL pulse. Following irradiation, the substrate surface was observed using a scanning electron microscope and an atomic force microscope. The surface modifications caused by the SXRL beam were clearly seen. The multi-layered mirror is the important component for the EUV lithography. Then, we have started the damage test of multi-layered structure, and the surface modifications caused by the SXRL pulse irradiations were confirmed.
Koike, Masato; Ishino, Masahiko; Imazono, Takashi; Sano, Kazuo*; Sasai, Hiroyuki*; Hatayama, Masatoshi*; Takenaka, Hisataka*; Heimann, P. A.*; Gullikson, E. M.*
Spectrochimica Acta, Part B, 64(8), p.756 - 760, 2009/08
Times Cited Count：9 Percentile：46.02(Spectroscopy)W/C and Co/SiO
multilayer laminar-type holographic plane gratings (groove density 1/1200 lines /mm) in the 1-8 keV region are developed. For the Co/SiO grating the diffraction efficiencies of 0.41 and 0.47 at 4 and 6 keV, respectively, and for the W/C grating 0.38 at 8 keV are observed. Taking advantage of the outstanding high diffraction efficiencies into practical soft X-ray spectrographs a Mo/SiO multilayer varied-line-spacing (VLS) laminar-type spherical grating (1/2400 lines /mm) is also developed for use with a flat field spectrograph in the region of 1.7 keV. For the Mo/SiO multilayer grating the diffraction efficiencies of 0.05-0.20 at 0.9-1.8 keV are observed. The FWHM's of the measured line profiles of Hf-M
(1644.6 eV), Si-K (1740.0 eV),and W-M (1775.4 eV) are 13.7 eV, 8.0 eV, and 8.7 eV, respectively. It shows the validity of multilayer lamina-type gratings in the region.
Koike, Masato; Ishino, Masahiko; Heimann, P. A.*; Imazono, Takashi; Takenaka, Hisataka*; Hatayama, Masatoshi*; Sasai, Hiroyuki*; Gullikson, E. M.*; Sano, Kazuo*
AIP Conference Proceedings 879, p.647 - 650, 2007/01
no abstracts in English
Ishino, Masahiko; Heimann, P. A.*; Sasai, Hiroyuki*; Hatayama, Masatoshi*; Takenaka, Hisataka*; Sano, Kazuo*; Gullikson, E. M.*; Koike, Masato
Applied Optics, 45(26), p.6741 - 6745, 2006/09
Times Cited Count：11 Percentile：49.13(Optics)no abstracts in English
Koike, Masato; Ishino, Masahiko; Sano, Kazuo*; Takenaka, Hisataka*; Hatayama, Masatoshi*; Sasai, Hiroyuki*; Heimann, P. A.*; Gullikson, E. M.*
no journal, ,
no abstracts in English
Koike, Masato; Ishino, Masahiko; Sano, Kazuo*; Takenaka, Hisataka*; Hatayama, Masatoshi*; Heimann, P. A.*; Gullikson, E. M.*; Sasai, Hiroyuki*
no journal, ,
no abstracts in English
Koike, Masato; Ishino, Masahiko; Takenaka, Hisataka*; Hatayama, Masatoshi*; Sano, Kazuo*; Heimann, P. A.*; Gullikson, E. M.*
no journal, ,
no abstracts in English
Ishino, Masahiko; Koike, Masato; Heimann, P. A.*; Sasai, Hiroyuki*; Hatayama, Masatoshi*; Takenaka, Hisataka*; Sano, Kazuo*; Gullikson, E. M.*
no journal, ,
no abstracts in English
Koike, Masato; Ishino, Masahiko; Heimann, P. A.*; Gullikson, E. M.*; Takenaka, Hisataka*; Hatayama, Masatoshi*; Sasai, Hiroyuki*; Sano, Kazuo*
no journal, ,
no abstracts in English
Koike, Masato; Ishino, Masahiko; Sano, Kazuo*; Sasai, Hiroyuki*; Takenaka, Hisataka*; Hatayama, Masatoshi*; Heimann, P. A.*; Gullikson, E. M.*
no journal, ,
no abstracts in English
Koike, Masato; Ishino, Masahiko; Imazono, Takashi; Sano, Kazuo*; Sasai, Hiroyuki*; Hatayama, Masatoshi*; Takenaka, Hisataka*; Heimann, P. A.*; Gullikson, E. M.*
no journal, ,
A multilayer laminar-type holographic grating having an average groove density of 2400 lines/mm was designed and fabricated for use with a soft X-ray flat field spectrograph covering the 0.70-0.75 nm region. A varied-line-spacing grooves pattern is generated by the use of an aspheric wavefront recording system and laminar-type grooves are formed by a reactive ion-etching method. Mo/SiO multilayers optimized for the emission bands of hafnium M, silicon K, and tungsten M are deposited on one of the three designated areas on the grating surface in tandem. The measured first-order diffraction efficiencies at the respective centers of the areas are 18-20 percent. A flat field spectrograph equipped with the grating indicates a spectral line width of 8-14 eV for the emission spectra generated from an electron-impact X-ray sources.
