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Oral presentation

Development of a soft X-ray flat-field spectrograph in the 50-4000 eV range and its application to electron microscopies

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.

Oral presentation

Particle and heavy ion transport code system; PHITS

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.

Oral presentation

Self-accelerating oxidation at oxide/Si(111) interfaces studied by real-time photoelectron spectroscopy

Tang, J.*; Nishimoto, Kiwamu*; Ogawa, Shuichi*; Yoshigoe, Akitaka; Ishizuka, Shinji*; Watanabe, Daiki*; Teraoka, Yuden; Takakuwa, Yuji*

no journal, , 

Oral presentation

$$gamma$$ ray irradiation dose dependence of electrical characterizations of SiC-MOS capacitors

Tanaka, 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

Oral presentation

In situ XRD/SAXS measurements in Au-catalyzed InGaAs nanowires

Sasaki, Takuo; Deki, Ryota*; Nakata, Yuka; Takahashi, Masamitsu

no journal, , 

no abstracts in English

Oral presentation

Interfacial structure of InAs epitaxial film grown on Si(111)-(4$$times$$1)-In surface

Nakata, Yuka; Sasaki, Takuo; Deki, Ryota*; Takahashi, Masamitsu

no journal, , 

no abstracts in English

Oral presentation

Impact on I-V characteristics of Si- and SiC-MOSFETs caused by $$gamma$$ ray

Yokoseki, 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

Oral presentation

Temperature dependence of electric conductivities in femtosecond laser modified areas on SiC

Oka, Tomoki*; Deki, Manato; Naoi, Yoshiki*; Makino, Takahiro; Oshima, Takeshi; Tomita, Takuro*

no journal, , 

no abstracts in English

Oral presentation

Molecularly chemisorbed oxygen observed in room-temperature oxidation at Si(100)-2$$times$$1 surface

Yoshigoe, 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)-2$$times$$1 surface as observed for the Si(111)-7$$times$$7 surface. surface.

Oral presentation

Study of organic solar cell by resonant soft X-ray scattering

Kubota, Masato; Sakurai, Takeaki*; Miyadera, Tetsuhiko*; Yoshida, Yuji*; Nakao, Hironori*

no journal, , 

no abstracts in English

Oral presentation

FET characteristics of photo-polymerized C$$_{60}$$ thin films on graphene electrodes

Arai, Daijiro; Tanimoto, Hisanori*; Otomo, Manabu; Entani, Shiro; Matsumoto, Yoshihiro*; Sakai, Seiji

no journal, , 

no abstracts in English

Oral presentation

Characterization of superconducting materials by neutron scattering

Shamoto, Shinichi

no journal, , 

no abstracts in English

Oral presentation

High efficiency diffraction gratings for study of trace boron by soft-X-ray emission spectroscopy

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$$^{circ}$$, the total reflection condition is satisfied but the reflectivity is 74% due to the large extinction coefficient of 8.4$$times$$10$$^{-3}$$. Carbon has a large critical angle of carbon of and small extinction coefficient of 7.6$$times$$10$$^{-4}$$. 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$$^{3}$$ and diamond-like carbon(ta-C) having 3.1 g/cm$$^{3}$$. 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.

Oral presentation

Generation of high power THz light for control of molecular rotation

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$$_{3}$$ 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).

Oral presentation

LET effects on the scintillation properties of a Ce-doped Ca$$_{3}$$B$$_{2}$$O$$_{6}$$6 scintillator

Koshimizu, Masanori*; Fujimoto, Yutaka*; Yanagida, Takayuki*; Iwamatsu, Kazuhiro; Kimura, Atsushi; Kurashima, Satoshi; Taguchi, Mitsumasa; Asai, Keisuke*

no journal, , 

no abstracts in English

Oral presentation

Oral presentation

Simultaneous determination of elements in multi-element aqueous solution by using LIBS

Oba, Hironori; Saeki, Morihisa; Wakaida, Ikuo

no journal, , 

no abstracts in English

Oral presentation

Discussion about epitaxial graphene growth on Cu(111) substrates based on the results of vacuum annealing experiments

Ogawa, Shuichi*; Yamada, Takatoshi*; Ishizuka, Shinji*; Yoshigoe, Akitaka; Hasegawa, Masataka*; Teraoka, Yuden; Takakuwa, Yuji*

no journal, , 

no abstracts in English

Oral presentation

Development of PDMS-based flexible waveguide fabricated by PBW fine processing

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

Oral presentation

A Spatial distribution of MeV ions in the interaction of intense laser pulses with cluster-gas targets

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.

36 (Records 1-20 displayed on this page)