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Sakai, Takuro; Iikura, Hiroshi; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Uchida, Masaya*
QST-M-8; QST Takasaki Annual Report 2016, P. 140, 2018/03
Kitamura, Akane; Kobayashi, Tomohiro*
Hoshasen Kagaku (Internet), (104), p.29 - 34, 2017/10
no abstracts in English
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
Ikeura, Hiromi*; Sekiguchi, Tetsuhiro; Koike, Masaki*
Journal of Electron Spectroscopy and Related Phenomena, 144-147, p.453 - 455, 2005/06
Times Cited Count：15 Percentile：56.91(Spectroscopy)no abstracts in English
Sato, Yasunori*; Yamaguchi, Daichi*; Oshima, Akihiro*; Kato, Takanori*; Ikeda, Shigetoshi*; Aoki, Yasushi*; Tanaka, Shigeru; Tabata, Yoneho*; Washio, Masakazu*
JAERI-Conf 2003-001, p.245 - 250, 2003/03
no abstracts in English
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
Sakai, Takuro; Iikura, Hiroshi; Yasuda, Ryo; Koka, Masashi; Sato, Takahiro; Ishii, Yasuyuki
no journal, ,
no abstracts in English
Sakai, Takuro; Yasuda, Ryo; Iikura, Hiroshi; Sato, Takahiro; Ishii, Yasuyuki
no journal, ,
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.
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.
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
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
Sakai, Takuro; Iikura, Hiroshi; Matsubayashi, Masahito; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Uchida, Masaya*
no journal, ,
no abstracts in English
Sakai, Takuro; Iikura, Hiroshi; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Uchida, Masaya*
no journal, ,
no abstracts in English
Sakai, Takuro; Iikura, Hiroshi; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Uchida, Masaya*
no journal, ,
no abstracts in English
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 
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.
Nishimura, Akihiko; Yamada, Tomonori; Furusawa, Akinori; Takenaka, Yusuke*
no journal, ,
no abstracts in English
Sakai, Takuro; Yamada, Naoto*; Sato, Takahiro*; Ishii, Yasuyuki*; Yamamoto, Shunya*; Uchida, Masaya*
no journal, ,
no abstracts in English
Nishimura, Akihiko
no journal, ,
no abstracts in English
Goto, Aki*; Yamashita, Shinichi*; Kitamura, Akane; Tagawa, Masahito*
no journal, ,
Atomic oxygen (AO) oxidizes and erodes several polymers used as thermal control films for satellites. The AO-irradiated surface is densely covered with microscopic protrusions. In this study, we focus the morphological change as unique modification. PE, PP and PS surfaces are observed by FE-SEM after AO-irradiation, and it is found that the AO fluence and chemical structures of these polymers are important factors for control the density of protrusions.
