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Imazono, Takashi; Koike, Masato; Kawachi, Tetsuya; Hasegawa, Noboru; Koeda, Masaru*; Nagano, Tetsuya*; Sasai, Hiroyuki*; Oue, Yuki*; Yonezawa, Zeno*; Kuramoto, Satoshi*; et al.
no journal, ,
A soft X-ray flat-field spectrograph in combination with electron microscopes is one of the powerful tools for not only the structural and elemental analyses, but also the valence band analysis of materials. It is expected to be able to detect soft X-ray emissions of 50-4000 eV emitted from various materials, but difficult to cover the whole energy range using a single diffraction grating by restriction of optical imaging property and surface material. To overcome this problem, a flat-field spectrograph compatible with four varied-line-spacing gratings optimized for the respective energy range of 50-200 eV, 155-350 eV, 300-2200 eV, and 2000-4000 eV has been designed. It results in that the spectrograph can be easily selected without complicated optical alignment by just changing the desired grating of the four. In addition, a multilayer mirror to enhance uniformly a reflectivity in 2-4 keV at a constant angle of incidence was invented and applied to a wideband multilayer grating.
Sato, Tatsuhiko; Niita, Koji*; Matsuda, Norihiro; Hashimoto, Shintaro; Iwamoto, Yosuke; Furuta, Takuya; Iwase, Hiroshi*; Noda, Shusaku; Ogawa, Tatsuhiko; Nakashima, Hiroshi; et al.
no journal, ,
General features of the Particle and Heavy Ion Transport Code System, PHITS, will be described at the meeting.
Tang, J.*; Nishimoto, Kiwamu*; Ogawa, Shuichi*; Yoshigoe, Akitaka; Ishizuka, Shinji*; Watanabe, Daiki*; Teraoka, Yuden; Takakuwa, Yuji*
no journal, ,
ray irradiation dose dependence of electrical characterizations of SiC-MOS capacitorsTanaka, Kazuya; Yokoseki, Takashi; Fujita, Natsuko; Makino, Takahiro; Onoda, Shinobu; Oshima, Takeshi; Tanaka, Yuki*; Kandori, Mikio*; Yoshie, Toru*; Hijikata, Yasuto*
no journal, ,
no abstracts in English
Sasaki, Takuo; Deki, Ryota*; Nakata, Yuka; Takahashi, Masamitsu
no journal, ,
no abstracts in English
1)-In surfaceNakata, Yuka; Sasaki, Takuo; Deki, Ryota*; Takahashi, Masamitsu
no journal, ,
no abstracts in English
rayYokoseki, Takashi; Tanaka, Kazuya; Fujita, Natsuko; Makino, Takahiro; Onoda, Shinobu; Oshima, Takeshi; Tanaka, Yuki*; Kandori, Mikio*; Yoshie, Toru*; Hijikata, Yasuto*
no journal, ,
no abstracts in English
Oka, Tomoki*; Deki, Manato; Naoi, Yoshiki*; Makino, Takahiro; Oshima, Takeshi; Tomita, Takuro*
no journal, ,
no abstracts in English
1 surfaceYoshigoe, Akitaka; Teraoka, Yuden; Okada, Ryuta; Iwai, Yutaro*; Yamada, Yoichi*; Sasaki, Masahiro*
no journal, ,
We report on the O 1s photoelectron peak related to moleculalry chemisorbed oxygen in the room-temperature oxidation of an Si(100)-21 surface as observed for the Si(111)-77 surface. surface.
Kubota, Masato; Sakurai, Takeaki*; Miyadera, Tetsuhiko*; Yoshida, Yuji*; Nakao, Hironori*
no journal, ,
no abstracts in English
thin films on graphene electrodesArai, Daijiro; Tanimoto, Hisanori*; Otomo, Manabu; Entani, Shiro; Matsumoto, Yoshihiro*; Sakai, Seiji
no journal, ,
no abstracts in English
Shamoto, Shinichi
no journal, ,
no abstracts in English
Koike, Masato; Imazono, Takashi; Koeda, Masaru*; Nagano, Tetsuya*; Sasai, Hiroyuki*; Oue, Yuki*; Yonezawa, Zeno*; Kuramoto, Satoshi*; Terauchi, Masami*; Takahashi, Hideyuki*; et al.
no journal, ,
When the grazing incidence angle is 3.0
, the total reflection condition is satisfied but the reflectivity is 74% due to the large extinction coefficient of 8.410
. Carbon has a large critical angle of carbon of and small extinction coefficient of 7.610
. We take these advantages to the coating of diffraction gratings. We assume the base laminar-type grating as follows: nickel layer of 30 nm thickness; groove density of 1200/ mm; duty ratio of 0.3; groove depth of 16 nm. Also it is assumed that the additions of conventional amorphous carbon having a density of 2.2 g/cm
and diamond-like carbon(ta-C) having 3.1 g/cm. Optimized thickness of a-C and ta-C is 12 and 24 nm, respectively. The increase of 33% 183.3 eV (a-C) and 80% (ta-C) is obtained compared with the base grating, respectively, resulting in high sensitivity measurement of ultra-trace boron K emission.
Tsubouchi, Masaaki; Ochi, Yoshihiro; Tanaka, Momoko; Yoshida, Fumiko; Nagashima, Keisuke
no journal, ,
We are developing intense THz light source to realize control of molecular axis orientation in space. From the theoretical studies by Hebling and co-workers, it has been known that the desirable excitation NIR pulse for the THz light generation process in the Mg-sLiNbO
crystal should have the pulse width of 400 fs - 1 ps, and the tilted pulse front by 63 degree. To generate such NIR light, the Yb:YAG based amplifier system is one of the good candidates. By using this system, we are trying to generate the intense THz light with the high repetition rate (1 kHz).
B
O
6 scintillatorKoshimizu, Masanori*; Fujimoto, Yutaka*; Yanagida, Takayuki*; Iwamatsu, Kazuhiro; Kimura, Atsushi; Kurashima, Satoshi; Taguchi, Mitsumasa; Asai, Keisuke*
no journal, ,
no abstracts in English
Nagaya, Yasunobu
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no abstracts in English
Oba, Hironori; Saeki, Morihisa; Wakaida, Ikuo
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no abstracts in English
Ogawa, Shuichi*; Yamada, Takatoshi*; Ishizuka, Shinji*; Yoshigoe, Akitaka; Hasegawa, Masataka*; Teraoka, Yuden; Takakuwa, Yuji*
no journal, ,
no abstracts in English
Saruya, Ryota*; Kato, Hijiri*; Kubota, Atsushi*; Miura, Kenta*; Kada, Wataru*; Sato, Takahiro; Koka, Masashi; Ishii, Yasuyuki; Kamiya, Tomihiro; Nishikawa, Hiroyuki*; et al.
no journal, ,
no abstracts in English
Kanasaki, Masato; Jinno, Satoshi; Sakaki, Hironao; Nishiuchi, Mamiko; Faenov, A. Ya.*; Pikuz, T.; Kondo, Kiminori; Oda, Keiji*; Yamauchi, Tomoya*; Matsui, Ryutaro*; et al.
no journal, ,
In laser-driven ion acceleration using cluster-gas targets, generated ions can be assigned to two components. One is a low energy component produced by Coulomb explosions of clusters. The other is a high energy component produced by a magnetic vortex acceleration mechanism. In the past studies, high energy ions were mainly measured by stacked CR-39 detectors to obtain the energy spectrum. In the present study, to reveal the acceleration mechanism, a spatial distribution of MeV ions was measured by CR-39 detectors which were encircled equidistant from the laser focus spot. The etch pit distribution on the CR-39 suggests that the acceleration mechanism cannot be explained only by Coulomb explosion mechanism, but by other complicated mechanisms.