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Analytical study of the applicability of FeCrAl-ODS cladding for BWR

高野 渉*; 草ヶ谷 和幸*; 後藤 大輔*; 坂本 寛*; 山下 真一郎

Proceedings of 2017 Water Reactor Fuel Performance Meeting (WRFPM 2017) (USB Flash Drive), 10 Pages, 2017/09



Micromachining of commodity plastics by proton beam writing and fabrication of spatial resolution test-chart for neutron radiography

酒井 卓郎; 安田 良; 飯倉 寛; 野島 健大; 松林 政仁; 加田 渉; 江夏 昌志; 佐藤 隆博; 大久保 猛; 石井 保行; et al.

Nuclear Instruments and Methods in Physics Research B, 306, p.299 - 301, 2013/07

 被引用回数:7 パーセンタイル:34.56(Instruments & Instrumentation)

Proton Beam Writing (PBW) is a direct-write technique for producing high-aspect-ratio micro- and nano-structures in resist material. This technique is a promising method for micromachining of commodity plastics such as acrylic resin. In this paper, we introduce fabrication of microscopic devices made of a relatively thick ($$sim$$75 $$mu$$m) acrylic sheet. An optimization of the fluence of 3 MeV proton beam to induce the chain scission in the sheet was performed at Takasaki Advanced Radiation Research Institute, JAEA. A software program that converts image pixels into coordinates data has been developed, and a fine jigsaw puzzle was fabricated on the sheet. The piece size of jigsaw puzzle is 50 $$times$$ 50 $$mu$$m. For practical use, A line and space test-chart for spatial resolution measurement on neutron radiography was also successfully created.


Mach-Zehnder polymer waveguides fabricated using proton beam writing

三浦 健太*; 佐藤 隆博; 石井 保行; 江夏 昌志; 桐生 弘武*; 小澤 優介*; 高野 勝昌*; 大久保 猛; 山崎 明義; 加田 渉; et al.

JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 126, 2013/01

In this study, a PMMA-based MZ waveguide was fabricated utilizing PBW to develop a thermo-optic switch. A 10-$$mu$$m-thick PMMA film was firstly spin-coated onto the 15 $$mu$$m SiO$$_2$$ film as the under cladding. Cores of a MZ waveguide with 8 $$mu$$m width were secondary drawn at the dose of 100 nC/mm$$^2$$ in the PMMA film using PBW with H$$^+$$ beam of the size of $$sim$$1.1 $$mu$$m and beam current of $$sim$$50 pA at 1.7 MeV. The MZ waveguide was drawn by symmetrically coupling two Y junctions and its branching angle was set to 2$$^circ$$ to reduce optical branching loss. Finally a 10-$$mu$$m-thick PMMA film was deposited again on the sample as an upper cladding by spin-coating. The mode-field diameter of near field patterns with about 10 $$mu$$m width was observed at $$lambda$$= 1.55 $$mu$$m on the basis of a fundamental mode without no higher-order modes which required to develop our objective MZ type thermo-optic switch for optical-fiber telecommunication. The result of the observation showed that the PMMA-based single-mode MZ waveguide for $$lambda$$= 1.55 $$mu$$m was successfully fabricated using PBW. As the next step to develop the optical switch, we will form a Ti thin-film heater and A$$ell$$ electrodes on the MZ waveguide using photolithography and wet-etching processes.


Fabrication of Mach-Zehnder polimer waveguides by a direct-drawing technique using a focus proton beam

三浦 健太*; 佐藤 隆博; 石井 保行; 桐生 弘武*; 小澤 優介*; 江夏 昌志; 高野 勝昌*; 大久保 猛; 山崎 明義; 加田 渉; et al.

Key Engineering Materials, 534, p.158 - 161, 2013/00

We develop a thermo-optic switch of the Mach-Zehnder type polymer waveguide using proton beam writing (PBW). In this study, we succeeded in near field pattern Mach-Zehnder type single mode polymer waveguides at a wavelength of 1550 nm. The samples for the waveguides were composed with a 15-$$mu$$-thick under-cladding layer of SiO$$_2$$ deposited on a Si substrate using radio-frequency sputtering and a 10-$$mu$$m-thick PMMA film spin-coated onto the SiO$$_2$$ layer as a core layer. We wrote Mach-Zehnder type waveguides having a width of 8 $$mu$$m on the PMMA layer by PBW with a beam size of $$sim$$1 $$mu$$m and a beam current of 50 pA. After this writing, the 10-$$mu$$m-thick-PMMA layer was deposited again as an upper-cladding layer by spin-coating. In the observation of these waveguides, the light of laser of 1550-nm wavelength was injected into one side of the waveguide through a single-mode fiber. From the observation of the light emitted from the opposite side of the waveguides, near field patterns was observed using a vidicon camera with an optical microscope. The observation result demonstrated that the light traveled by single mode in the Mach-Zehnder type polymer waveguide. In the conference, we will report the development of the Mach-Zehnder type polymer waveguide in detail. In addition, the thermo-optic switch at the wavelength of 1550 nm by the Mach-Zehnder type polymer waveguide will also be briefly reported.


Visualization of focused proton beam dose distribution by atomic force microscopy using blended polymer films based on polyacrylic acid

大道 正明*; 高野 勝昌*; 佐藤 隆博; 神谷 富裕; 石井 保行; 大久保 猛; 江夏 昌志; 加田 渉; 杉本 雅樹; 西川 宏之*; et al.

Journal of Nanoscience and Nanotechnology, 12, p.7401 - 7404, 2012/09

 被引用回数:2 パーセンタイル:84.67(Chemistry, Multidisciplinary)

A new visualization method for dose distribution of a focused proton beam in sub-micrometer scale was developed using a formation of a bulky cross-linked structure of polyacrylic acid -$$N$$, $$N$$'-methylence bisacrylamide, blend film. The areas irradiated by the focused proton beam were swelled on the film. The height of the swelling was significantly increased according to the beam fluence and the increase of containing ratio of the methylence bisacrylamide. The height was saturated at the fluence of 5$$times$$10$$^5$$ ions/$$mu$$m$$^{2}$$. The proton beam-sensitive polymer film was used for the analysis of dose distribution on its surface. The irradiated surface was observed by employing an atomic force microscope. This observation result showed that the method could be used to confirm the writing patterns and the beam-spot shape. Nanostructures with a crescent shape are visualized clearly at a misaligned beam-spot shape in the set up of the beam-optics.


Ion-beam-induced luminescence analysis as diagnostic tool for microstructure patterning on diamond by proton beam writing

加田 渉; 横山 彰人; 江夏 昌志; 高野 勝昌*; 佐藤 隆博; 神谷 富裕

Japanese Journal of Applied Physics, 51(6), p.06FB07_1 - 06FB07_5, 2012/06

 被引用回数:6 パーセンタイル:64.08(Physics, Applied)

ダイヤモンド表面へのイオンビーム微細加工(PBW)プロセスの評価のために、イオンビーム誘起発光分析(micro-IBIL)システムを新たに開発した。3MeVビームで試料表面に描画することで、ダイヤモンド基板(3.0mm$$times$$3.0mm$$times$$0.5mm IIa単結晶ダイヤモンド)中に埋め込まれた微細構造を作製した。PBW描画中にIBIL計測を行うことで、イオンビーム照射に伴う発光の変化を計測できた。照射したダイヤモンドの結晶状態を同じビームラインに設置した単波長型のイオンビーム誘起発光システムによって分析した結果、描画した領域がダイヤモンドのAバンド発光に起因する発光領域と対応していることが確かめられた。


Fabrication of poly(9,9'-dioctylfluorene)-based nano- and microstructures by proton beam writing

前吉 雄太*; 高野 勝昌*; 麻野 敦資*; 丸井 裕美*; 大道 正明*; 佐藤 隆博; 神谷 富裕; 石井 保行; 大久保 猛; 江夏 昌志; et al.

Japanese Journal of Applied Physics, 51(4), p.045201_1 - 045201_4, 2012/04

 被引用回数:1 パーセンタイル:93.6(Physics, Applied)

A relation between the fluence and the beam-induced chemical reaction in poly(9,9'-dioctylfluorene), PFO, films has been investigated to fabricate PFO-based nano-micro structures using Proton Beam Writing, PBW. In this investigation, we observed that the cross-linking reaction in PFO occurred without a cross-linking agent using PBW. Furthermore, not only the surface morphology but also structure and shape on PFO films were changed from nano-meter to micro-meter size by controlling the fluence of proton beam irradiation on the basis of the investigation. Consequently, the structure of the arabic numbers was successful fabricated as three-dimensional PFO structures with the aspect ratio of 12 at the fluence of 3.5 $$times$$ 10$$^6$$ ions/$$mu$$m$$^2$$ by PBW.


Fast single-ion hit system for heavy-ion microbeam at TIARA cyclotron, 4

横田 渉; 佐藤 隆博; 奥村 進; 倉島 俊; 宮脇 信正; 柏木 啓次; 吉田 健一; 江夏 昌志; 高野 勝昌*; 横山 彰人; et al.

JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 159, 2012/01



Operation of the AVF cyclotron

奈良 孝幸; 石堀 郁夫; 倉島 俊; 吉田 健一; 湯山 貴裕; 石坂 知久; 奥村 進; 宮脇 信正; 柏木 啓次; 百合 庸介; et al.

JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 172, 2012/01



3D micro-fabrication utilized superimposing technique with focused MeV ion beams

高野 勝昌*; 佐藤 隆博; 神谷 富裕; 石井 保行; 大久保 猛; 江夏 昌志; 加田 渉; 杉本 雅樹; 関 修平*; 西川 宏之*

JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 162, 2012/01

A unique micro-processing technique for epoxy resin films has been developed at the TIARA, utilizing the ion beam writing with multiple energies of light and heavy ion beams. In this study, nano-wire structure fabrication was tried by a superimposing with the proton beams and 520 MeV $$^{40}$$Ar$$^{14+}$$. And in order to reduce the surface tension in developing and drying processes, after a baking at 95 $$^{circ}$$C for 1 minute, developing and drying was performed with super-critical CO$$_{2}$$ at 12 MPa, 40 $$^{circ}$$C. As the result, the bridge structure which strung the wires fabricated by 520 MeV $$^{40}$$Ar$$^{14+}$$ hitting can be observed at the aimed points.


Fabrication of Y-junction waveguides using proton beam writing

三浦 健太*; 佐藤 隆博; 石井 保行; 江夏 昌志; 上原 政人*; 桐生 弘武*; 高野 勝昌*; 大久保 猛; 山崎 明義; 加田 渉; et al.

JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 126, 2012/01

We develop optical waveguides using Proton Beam Writing (PBW). In this study, Y-junction PMMA film waveguides at 1.55 $$mu$$m were fabricated using PBW. First, an SiO$$_2$$ film was deposited as an under-cladding on an Si substrate using radio-frequency sputtering. After a PMMA film was spin-coated on the SiO$$_2$$ film, the sample was baked at 120 $$^{circ}$$C. The thickness of PMMA film became 10 $$mu$$m by repeating these processes twice. Next, a Y-junction waveguides with the width of 8 $$mu$$m and branching angle of 2 $$^circ$$ were drawn in the PMMA film on the condition of the dose of 100 nC/mm$$^2$$ using PBW having a 1.7 MeV proton beam with the current of 10 pA and the size of about 1 $$mu$$m. Finally, a 10-$$mu$$m thick PMMA film was deposited again on the sample as an upper-cladding layer by spin-coating. The observation of an optical microscope showed that an objective Y-junction was successfully drawn using PBW. To observe near field patterns (NFPs), the laser light of wavelength at 1.55 $$mu$$n was injected through a single-mode fiber (SMF) from one side of the edge of the waveguide cleaved both sides of the sample. The two independent NFPs were observed form each branching waveguide using a vidicon camera at the opposite side of the waveguide. The observation result of the two NFPs with an optical power intensity ratio of 1:0.98 demonstrated that the light of 1.55 $$mu$$m was divided at almost equal ratio by this Y-junction.


Fabrication of polymer optical waveguides for the 1.5-$$mu$$m band using focused proton beam

三浦 健太*; 町田 裕貴*; 上原 政人*; 桐生 弘武*; 小澤 優介*; 佐々木 友之*; 花泉 修*; 佐藤 隆博; 石井 保行; 江夏 昌志; et al.

Key Engineering Materials, 497, p.147 - 150, 2011/12

 被引用回数:6 パーセンタイル:2.48

Single mode straight waveguides for a wavelength of 1.55-$$mu$$m were, so far, fabricated using a proton beam writing (PBW) technique. We report the fabrication of Y-junction polymer waveguides with a polymethyl methacralate (PMMA) layers as the expansion of these straight waveguides using PBW in the conference. The PMMA layers consisted of an under-cladding layer of SiO$$_2$$ having a thickness of $$sim$$ 15-$$mu$$m deposited on an Si substrate, a PMMA layer having a thickness of $$sim$$ 10-$$mu$$m spin-coated onto the SiO$$_2$$ layer and a Y-junction waveguide with a width of 8-$$mu$$m in a PMMA core layer. The Y-junction waveguides with the angle of 2$$^{circ}$$ were drawn using the 1.7 MeV proton beam with 1-$$mu$$m in diameter and a beam current of 10 pA for a dose of 100 nC/mm$$^2$$. After spin-coating the PMMA layer with $$sim$$ 10-$$mu$$m thickness as an upper cladding on the irradiated PMMA layer, the near field pattern (NFP) of an 8-$$mu$$m-width Y-junction waveguide was observed using a tunable-wavelength laser. The observation showed that the fabrication of waveguide was succeeded because its waveguide was single mode and the intensity ratio between the two outputted lights was the almost same; 1:0.96. We also briefly report the next plans of the measurement of the refractive indices of proton-irradiated PMMA and SiO$$_2$$ films and the fabrication of a thermo-optic polymer switch based on a Mach-Zehnder interferometer waveguide.


Fast single-ion hit system for heavy-ion microbeam at TIARA cyclotron, 3

横田 渉; 佐藤 隆博; 奥村 進; 倉島 俊; 宮脇 信正; 柏木 啓次; 吉田 健一; 江夏 昌志; 高野 勝昌; 神谷 富裕

JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 173, 2011/01



Operation of the AVF cyclotron

奈良 孝幸; 石堀 郁夫; 倉島 俊; 吉田 健一; 湯山 貴裕; 石坂 知久; 奥村 進; 宮脇 信正; 柏木 啓次; 百合 庸介; et al.

JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 180, 2011/01



Operation of the AVF cyclotron

奈良 孝幸; 石堀 郁夫; 倉島 俊; 吉田 健一; 湯山 貴裕; 石坂 知久; 奥村 進; 宮脇 信正; 柏木 啓次; 百合 庸介; et al.

JAEA-Review 2008-055, JAEA Takasaki Annual Report 2007, P. 190, 2008/11



Operation of AVF cyclotron

奈良 孝幸; 上松 敬; 石堀 郁夫; 倉島 俊; 吉田 健一; 湯山 貴裕; 石坂 知久; 奥村 進; 宮脇 信正; 柏木 啓次; et al.

JAEA-Review 2007-060, JAEA Takasaki Annual Report 2006, P. 204, 2008/03



On a fast reactor cycle scheme that incorporates a thoria-based minor actinide-containing cermet fuel

逢坂 正彦; 高野 渉*; 山根 義宏*; 三澤 毅*

Progress in Nuclear Energy, 50(2-6), p.212 - 218, 2008/03

 被引用回数:6 パーセンタイル:57.24(Nuclear Science & Technology)




湯山 貴裕; 奈良 孝幸; 石堀 郁夫; 倉島 俊; 吉田 健一; 石坂 知久; 奥村 進; 宮脇 信正; 柏木 啓次; 百合 庸介; et al.

Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.259 - 261, 2008/00




奈良 孝幸; 上松 敬; 石堀 郁夫; 倉島 俊; 吉田 健一; 奥村 進; 宮脇 信正; 柏木 啓次; 百合 庸介; 横田 渉; et al.

JAEA-Review 2006-042, JAEA Takasaki Annual Report 2005, P. 196, 2007/02



A Novel concept for americium-containing target for use in fast reactors

逢坂 正彦; 小井 衛; 高野 渉*; 山根 義宏*; 三澤 毅*

Journal of Nuclear Science and Technology, 43(4), p.367 - 374, 2006/04

 被引用回数:12 パーセンタイル:29.25(Nuclear Science & Technology)


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