A Chemiluminescence sensor with signal amplification based on a self-immolative reaction for the detection of fluoride ion at low concentrations

久松 秀悟; 鈴木 伸一; 幸本 重男*; 岸川 圭希*; 山本 雄介*; 元川 竜平; 矢板 毅

Tetrahedron, 73(27-28), p.3993 - 3998, 2017/07

https://doi.org/10.1016/j.tet.2017.05.084

A sensory system incorporated with an amplification function was developed for detection of trace-level fluoride ions. This sensory system comprises two steps, namely, amplification, and chemiluminescence. These steps were linked with chemical reactions and were induced continuously. The process from amplification to chemiluminescence was accomplished in the system by using fluoride ions. The amplification was based on a self-immolative system, which permitted the detection of emissions even at low fluoride ion concentration for system in which chemiluminescence cannot be induced in the absence of fluoride ions. An optical ratio of the chemiluminescent compound and the amplifier was calculated for achieving efficient amplification.

ITPA(国際トカマク物理活動)会合報告,50

河野 康則; 秋山 毅志*; 石川 正男; 磯部 光孝*; 伊丹 潔; 江尻 晶*; Peterson, B.*

プラズマ・核融合学会誌, 91(8), P. 565, 2015/08

http://www.jspf.or.jp/Journal/PDF_JSPF/jspf2015_08/jspf2015_08-566.pdf

ITPA(国際トカマク物理活動)計測トピカルグループは、ITERの計測・制御に関する最重要課題及び今後実施すべき研究開発について議論・検討を行うグループであり、その第28回会合が、平成27年5月19日-22日の日程で核融合科学研究所(土岐市)において開催された。主な報告・議論の内容を以下に記す。(1)最重要課題への取り組み状況:「プラズマ対向第一ミラーの寿命評価」については、RF放電を用いたクリーニング技術について、ITERでは60MHzのRF放電を採用予定であり(従来は13.8MHz)、今後の開発の必要性が認識された。「損失アルファ粒子計測の検討」については、ITER機構での取り組み状況が報告され、従来の可視/赤外イメージ計測に加え、可動プローブ計測を検討していることが報告された。(2)日本における計測開発の進展: ITER, JT-60SA, LHD, GAMMA10/PDX等における計測開発の現状について広範な報告及び活発な議論が行われ、それぞれ着実に進展していることが認識された。次回会合は、平成27年11月に、ITER機構にて開催することとなった。

ITPA(国際トカマク物理活動)会合報告,46

河野 康則; 秋山 毅志*; 石川 正男; 磯部 光孝*; 伊丹 潔; 江尻 晶*; Peterson, B.*

プラズマ・核融合学会誌, 90(7), P. 431, 2014/07

http://www.jspf.or.jp/Journal/PDF_JSPF/jspf2014_07/jspf2014_07-431.pdf

ITPA(国際トカマク物理活動)計測トピカルグループは、ITERの計測・制御に関する最重要課題及び今後実施すべき研究開発について議論・検討を行うグループであり、その第26回会合が、平成26年5月19日-22日の日程で韓国の浦項工科大学校において開催された(出席: 36名、内訳/日本: 5名、韓国: 17名、米国: 1名、EU: 5名、中国: 3名、ロシア: 4名、ITER機構: 1名、インド:不参加)。主な報告・議論の内容を以下に記す。(1)最重要課題への取り組み状況:「プラズマ対向第一ミラーの寿命評価」については、RF放電(13.56MHz)を用いたミラークリーニング技術の磁場環境下(3.5T)での実証試験計画(スイス)について、真空チャンバーが完成し、初期実験が順調に開始されたことが報告された。「壁反射光の光学計測への影響評価」については、光線追跡法を適用することで、測定信号から壁反射光成分とプラズマ発光成分を分離可能なことが示され、今後の進展に期待が寄せられた。(2)各極における計測開発の進展: 日本からは、日本が調達するITER計測装置の開発の進展、イメージングボロメータのITERへの適用性検討状況、JT-60SA及び大型ヘリカル装置における計測装置の開発状況について報告された。韓国からは、同国が調達するITER計測装置の開発状況をはじめ、ECEイメージング計測のKSTARにおける最新成果及びITERへの適用性検討結果等が報告された。

Microprocessing of arched bridge structures with epoxy resin by proton beam writing

高野 勝昌*; 麻野 敦資*; 前吉 雄太*; 丸井 裕美*; 大道 正明*; 佐伯 昭紀*; 関 修平*; 佐藤 隆博; 石井 保行; 神谷 富裕; et al.

Journal of Photopolymer Science and Technology, 25(1), p.43 - 46, 2012/07

https://doi.org/10.2494/photopolymer.25.43

The proton beam writing (PBW) with energy of several MeV ranges is a unique tool of three-dimensional microprocessing for a polymer material. Three-dimensional structures like a bridge structure can be fabricated by the double exposures of PBW with two deferent energies followed by the one-time development using etching solution. In this study, the fabrication of an arched bridge was attempted by means of the supercritical drying with liquid carbon dioxide to a SU-8 photoresist film, as the polymer material, coated on a substrate of epoxy sheet, after the PBW process. In the exposures, two patterns of bridge girders and piers were written with 0.5 and 3 MeV proton beams to the SU-8 photoresist films, respectively. After these writings, the photoresist films were developed with the solution of diacetone alcohol and rinsed with the solution of isopropyl alcohol. Then the supercritical drying with liquid carbon dioxide was used at 12 MPa, 40C. As the results, the bridge structures with curved girders to the vertical direction were formed due to the swelling effect of the photoresist film on the drying. In the conference, the microprocessing method of the bridge structure and the swelling effect of the photoresist film will be represented in detail.

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(4R), p.045201_1 - 045201_4, 2012/04

https://doi.org/10.1143/JJAP.51.045201

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 10 ions/m by PBW.

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

https://doi.org/10.11484/jaea-review-2011-043

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 Ar. And in order to reduce the surface tension in developing and drying processes, after a baking at 95 C for 1 minute, developing and drying was performed with super-critical CO at 12 MPa, 40 C. As the result, the bridge structure which strung the wires fabricated by 520 MeV Ar hitting can be observed at the aimed points.

Fabrication of polymer optical waveguides for the 1.5-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

https://doi.org/10.4028/www.scientific.net/KEM.497.147

Single mode straight waveguides for a wavelength of 1.55-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 having a thickness of 15-m deposited on an Si substrate, a PMMA layer having a thickness of 10-m spin-coated onto the SiO layer and a Y-junction waveguide with a width of 8-m in a PMMA core layer. The Y-junction waveguides with the angle of 2 were drawn using the 1.7 MeV proton beam with 1-m in diameter and a beam current of 10 pA for a dose of 100 nC/mm. After spin-coating the PMMA layer with 10-m thickness as an upper cladding on the irradiated PMMA layer, the near field pattern (NFP) of an 8-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 films and the fabrication of a thermo-optic polymer switch based on a Mach-Zehnder interferometer waveguide.

Benchmark calculations of sodium-void experiments with uranium fuels at the fast critical assembly FCA

福島 昌宏; 北村 康則; 久語 輝彦; 山根 剛; 安藤 真樹; 千葉 豪; 石川 眞; 岡嶋 成晃

Progress in Nuclear Science and Technology (Internet), 2, p.306 - 311, 2011/10

https://doi.org/10.15669/pnst.2.306

The capture cross section of U has been re-evaluated by the OECD/NEA/NSC/WPEC subgroup 29 focusing on energy region from 100 eV to 1 MeV from the viewpoints of differential and integral data analyses since 2007. Sodium-void reactivity experiments with uranium fuels were carried out at the Fast Critical Assembly (FCA) in the Japan Atomic Energy Agency (JAEA) in 2009 and new integral data were obtained to help to validate the re-evaluated capture cross section of U. The benchmark calculations for the new integral data were performed by using a continuous-energy Monte Carlo code (MVP) with use of the evaluated nuclear data libraries JENDL-3.2, -3.3, -4.0, ENDF/B-VII.0 and JEFF-3.1. The ratios of calculated to experimental (C/E) values of sodium-void reactivities with respect to JENDL-3.3, ENDF/B-VII.0 and JEFF-3.1 are less than those with respect to JENDL-3.2 and -4.0. The analysis results are similar to those of sodium-void reactivities previously obtained at the BFS facility in Russia. The benchmark calculations demonstrate the improvement of the reliability of the integral data such as the new integral data obtained at the FCA and the previously obtained data in the BFS and the usefulness of the new integral data for the validation of the re-evaluated cross section of U.

Benchmark calculations of sodium-void experiments with uranium fuels at the fast critical assembly FCA

福島 昌宏; 北村 康則; 久語 輝彦; 山根 剛; 安藤 真樹; 千葉 豪; 石川 眞; 岡嶋 成晃

Proceedings of Joint International Conference of 7th Supercomputing in Nuclear Application and 3rd Monte Carlo (SNA + MC 2010) (USB Flash Drive), 6 Pages, 2010/10

The capture cross section of U has been re-evaluated by the OECD/NEA/NSC/WPEC Subgroup 29 focusing on energy region from 100 eV to 1 MeV from the viewpoints of differential and integral data analyses since 2007. Sodium-void reactivity experiments with uranium fuels were carried out at the Fast Critical Assembly (FCA) in the Japan Atomic Energy Agency (JAEA) in 2009 and new integral data were obtained to help to validate the re-evaluated capture cross section of U. The benchmark calculations for the new integral data were performed by using a continuous-energy Monte Carlo code (MVP) with use of the evaluated nuclear data libraries JENDL-3.2, -3.3, -4.0, ENDF/B-VII.0 and JEFF-3.1. The ratios of calculation to experimental (C/E) values of sodium-void reactivities with respect to JENDL-3.3, ENDF/B-VII.0 and JEFF-3.1 are less than those with respect to JENDL-3.2 and -4.0. The analysis results are similar to those of sodium-void reactivities previously obtained at the BFS facility which is another fast critical assembly in Russia. The benchmark calculations demonstrate the improvement of the reliability of the integral data such as the new integral data obtained at the FCA and the previously obtained data in the BFS and the usefulness of the new integral data for the validation of the re-evaluated cross section of U.

Study on Mo production by Mo-solution irradiation method, 3; Activation analysis of irradiation target

Huynh, T. P.*; 稲葉 良知; 石田 卓也; 石川 幸治*; 蓼沼 克嘉*; 石塚 悦男

JAEA-Technology 2009-039, 21 Pages, 2009/07

JAEA-Technology-2009-039.pdf:2.53MB

Moを製造するための溶液照射法の照射ターゲットとして、モリブデン酸アンモニウムとモリブデン酸カリウムの2つの水溶液を選定し、水溶液中の不純物濃度を評価するためにk標準法を用いた放射化分析を実施した。この結果、始発粉末中にNa, Mn及びWの不純物が同定された。また、これらの水溶液を用いた線照射下でのキャプセル等の構造材(SUS304)との両立性試験において、試験後の水溶液の放射化分析を実施した結果、同定された不純物濃度の変化がないこと,構造材から溶出した元素が検出されないことが明らかとなった。しかし、同水溶液をICPで分析した結果、構造材のわずかな腐食が認められた。