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Journal Articles

Fabrication of neutron optical devices using PBW technique

Sakai, Takuro; Iikura, Hiroshi; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Uchida, Masaya*

QST-M-8; QST Takasaki Annual Report 2016, P. 140, 2018/03

Journal Articles

Microfabrication of fluoropolymers using ion beam irradiation

Kitamura, Akane; Kobayashi, Tomohiro*

Hoshasen Kagaku (Internet), (104), p.29 - 34, 2017/10

no abstracts in English

Journal Articles

Improvement of ion microbeam scanning system in JAERI Takasakai; Development of proton beam writing

Sakai, Takuro; Sato, Takahiro; Ishii, Yasuyuki; Oikawa, Masakazu*; Shimada, Hirofumi*; Haga, Junji*

Dai-18-Kai Tandemu Kasokuki Oyobi Sono Shuhen Gijutsu No Kenkyukai Hokokushu, p.73 - 76, 2005/10

no abstracts in English

Journal Articles

Characterization and degradation of ZEP520 resist film by TOF-PSID and NEXAFS

Ikeura, Hiromi*; Sekiguchi, Tetsuhiro; Koike, Masaki*

Journal of Electron Spectroscopy and Related Phenomena, 144-147, p.453 - 455, 2005/06

 Times Cited Count:10 Percentile:50.3(Spectroscopy)

no abstracts in English

Journal Articles

Cell surgery applications of heavy ion microbeams

Kobayashi, Yasuhiko; Taguchi, Mitsumasa; Watanabe, Hiroshi; Yamamoto, Kazuo*; Yamasaki, Shuhei*; Tu, Z. L.*; Kinjo, Y.*; Kiguchi, Kenji*

Proceedings of 11th International Congress of Radiation Research (ICRR-11), 2, p.182 - 186, 2000/00

no abstracts in English

Oral presentation

Development of 3D micromachining technique using proton microbeam and range shifters

Sakai, Takuro; Iikura, Hiroshi; Yasuda, Ryo; Koka, Masashi; Sato, Takahiro; Ishii, Yasuyuki

no journal, , 

no abstracts in English

Oral presentation

Development of novel micromachining technique using proton microbeam and range shifters

Sakai, Takuro; Yasuda, Ryo; Iikura, Hiroshi; Sato, Takahiro; Ishii, Yasuyuki

no journal, , 

Oral presentation

Toward user-friendly thermal radiometers; Microfabrication of novel photo-thermal sensors and broadband ultra-black absorbers

Amemiya, Kuniaki*; Koshikawa, Hiroshi; Yamaki, Tetsuya; Maekawa, Yasunari; Shitomi, Hiroshi*; Kinoshita, Kenichi*; Numata, Takayuki*; Tanabe, Minoru*; Fukuda, Daiji*

no journal, , 

A thermal radiometer absorbs all incoming photons and has a high sensitivity to detect the resulting temperature rise. The big challenges here were insufficient mechanical stability of broadband ultra-black absorbers and low sensitivity of photo-thermal sensors. We developed a robust optical absorber and low-noise photo-thermal sensor by new microfabrication techniques. The optical absorbers had micrometer-sized surface structures of chemically-etched ion tracks on CR-39 plastic and hard carbon coating as an optical absorption layer, therefore, exhibiting a spectral reflectance suppressed to below 1% in the ultra-violet to near infrared range of wavelengths. Importantly, they were never made susceptible to dust blow off as well as to mechanical contact. The photo-thermal detectors were equipped with the bimetal MEMS system, which can sensitively respond to thermally-induced deformation. They were found sensitive enough to reach almost the theoretical limit.

Oral presentation

Design and fabrication of novel broadband near-perfect black absorber having microstructured surface

Amemiya, Kuniaki*; Koshikawa, Hiroshi; Yamaki, Tetsuya; Maekawa, Yasunari; Shitomi, Hiroshi*; Kinoshita, Kenichi*; Numata, Takayuki*; Tanabe, Minoru*; Fukuda, Daiji*

no journal, , 

The novel broadband near-perfect black absorber for an absolute radiometer has been developed. Microstructured surface having high-aspect-ratio conical pores was fabricated by swift heavy ion beam irradiation and following etching process; subsequently, the surface was coated with black layer. Incident light which enters into the surface microstructure experiences multiple reflections which enhance optical absorption; therefore, the net reflectance decreases much less than 1% with sufficient pit aspect ratio and absorption layer thickness, which can be designed by finite differential time domain (FDTD) method calculation. Furthermore, a prototype of the novel black absorber also exhibited good mechanical durability. This newly developed black material is also expected to have potential application in various fields of optical energy management such as stray light elimination.

Oral presentation

Microfabrication of biocompatible hydrogels by proton beam writing

Nagasawa, Naotsugu; Kimura, Atsushi; Idesaki, Akira; Ishii, Yasuyuki; Yamada, Naoto; Koka, Masashi; Shimada, Akihiko; Okubo, Takeru; Sato, Takahiro; Taguchi, Mitsumasa

no journal, , 

no abstracts in English

Oral presentation

Fabrication of an absorption grating for neutron phase imaging using Gd-based metallic glass imprinting

Ueno, Wakana; Shinohara, Takenao; Seki, Yoshichika; Kai, Tetsuya; Parker, J. D.*; Sadeghilaridjani, M.*; Kato, Hidemi*; Yashiro, Wataru*; Momose, Atsushi*

no journal, , 

no abstracts in English

Oral presentation

Fabrication of novel neutron optical devices using proton microbeam

Sakai, Takuro; Iikura, Hiroshi; Matsubayashi, Masahito; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Uchida, Masaya*

no journal, , 

no abstracts in English

Oral presentation

Fabrication of neutron fine gratings using in-air proton microbeam

Sakai, Takuro; Iikura, Hiroshi; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Uchida, Masaya*

no journal, , 

no abstracts in English

Oral presentation

Fabrication of novel neutron optical devices using proton microbeam, 2

Sakai, Takuro; Iikura, Hiroshi; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Uchida, Masaya*

no journal, , 

no abstracts in English

Oral presentation

Technique of microfabrication for fluoropolymers by using ion beam irradiation

Kitamura, Akane

no journal, , 

We developed three types of microfabrication for fluoropolymers using ion beam irradiation. The smooth Teflon surface becomes rough by a keV ion beam irradiation. At a high fluence, needle-like protrusions were thickly formed all over the surface. When 3-MeV proton microbeam scanned on the surface along a spiral from the center, a porous conical structure was formed. It was caused by volume expansion along the ion trajectories. Ion track membranes of poly(vinylidene fluoride) (PVDF) were developed by a track etching technique using irradiation with a 330-MeV $$^{40}$$Ar ion beam in an oxygen atmosphere. Ion tracks were etched without any oxidant. Oxidant is essential for conventional methods but it causes serious deterioration in the quality of PVDF membranes. Therefore, our technique is useful as an oxidant-free track-etching process.

Oral presentation

Application of laser ablation and laser fine processing to atomic energy research

Nishimura, Akihiko; Yamada, Tomonori; Furusawa, Akinori; Takenaka, Yusuke*

no journal, , 

no abstracts in English

Oral presentation

Fabrication of novel neutron optical devices using proton microbeam, 3

Sakai, Takuro; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Yamamoto, Shunya*; Uchida, Masaya*

no journal, , 

no abstracts in English

Oral presentation

Morphological change of microstructure of polymer surface irradiated with atomic oxygen

Goto, Aki*; Yamashita, Shinichi*; Kitamura, Akane; Tagawa, Masahito*

no journal, , 

Polymer surface is covered densely with nano to microscopic protrusions by AO irradiation. In this study, we focus this unique morphological change. LDPE, PP, and PS film surfaces were observed by FE-SEM after AO-irradiation, and it is found that the AO fluence and the chemical structures of these polymers are important factors to determine the density of these microscopic protrusions.

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