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Journal Articles

A Measurement method of long-term mechanical stability of support and rock mass after the excavation of galleries; Case study in Horonobe Underground Research Center

Aoyagi, Kazuhei; Sakurai, Akitaka; Miyara, Nobukatsu; Sugita, Yutaka; Tanai, Kenji

Shigen, Sozai Koenshu (Internet), 6(2), 7 Pages, 2019/09

no abstracts in English

Journal Articles

Battery-free, skin-interfaced microfluidic/electronic systems for simultaneous electrochemical, colorimetric, and volumetric analysis of sweat

Bandodkar, A. J.*; Gutruf, P.*; Choi, J.*; Lee, K.-H.*; Sekine, Yurina; Reeder, J. T.*; Jeang, W. J.*; Aranyosi, A. J.*; Lee, S. P.*; Model, J. B.*; et al.

Science Advances (Internet), 5(1), p.eaav3294_1 - eaav3294_15, 2019/01

 Times Cited Count:60 Percentile:0.14(Multidisciplinary Sciences)

Interest in advanced wearable technologies increasingly extends beyond systems for biophysical measurements to those that enable continuous, non-invasive monitoring of biochemical markers in biofluids. Here, we introduce battery-free, wireless microelectronic platforms that perform sensing via schemes inspired by the operation of biofuel cells. Combining these systems in a magnetically releasable manner with chrono-sampling microfluidic networks that incorporate assays based on colorimetric sensing yields thin, flexible, lightweight, skin-interfaced technologies with broad functionality in sweat analysis. A demonstration device allows simultaneous monitoring of sweat rate/loss, along with quantitative measurements of pH and of lactate, glucose and chloride concentrations using biofuel cell and colorimetric approaches.

Journal Articles

A Three-dimensional imaging technique for radioactive contamination

Sato, Yuki; Torii, Tatsuo

Isotope News, (757), p.44 - 47, 2018/06

no abstracts in English

Journal Articles

High proton radiation tolerance of InAsSb quantum-well-based micro-Hall sensors

Abderrahmane, A.*; Ko, P. J.*; Okada, Hiroshi*; Sato, Shinichiro; Oshima, Takeshi; Shibasaki, Ichiro*; Sandhu, A.*

IEEE Electron Device Letters, 35(12), p.1305 - 1307, 2014/12

 Times Cited Count:0 Percentile:100(Engineering, Electrical & Electronic)

Tolerance of AlInSb/InAsSb/AlInSb heterostructures quantum-well-based micro-Hall sensors against proton irradiation of 380 keV and proton fluence in the range 10$$^{11}$$ and 10$$^{16}$$ (proton/cm$$^2$$) is reported. Defects and deep levels induced by proton irradiation into the heterostructures caused decreases in the mobility of the micro-Hall sensors. Degradation of the magnetic sensitivity started at a proton fluence of 10$$^{13}$$ (proton/cm$$^2$$) and continued with increasing proton fluence. The variation of the micro-Hall sensors sensitivity was minimal in low doped AlInSb/InAsSb/AlInSb heterostructure quantum wells. These micro-Hall sensors were operable even at proton fluence of 10$$^{16}$$ (proton/cm$$^{2}$$), which makes these devices suitable for space applications with lifetime of thousands of years in the outer space.

Journal Articles

Zirconia membrane ECP electrode for water chemistry experiments in the JMTR

Hanawa, Satoshi; Hata, Kuniki; Shibata, Akira; Chimi, Yasuhiro; Kasahara, Shigeki; Tsutsui, Nobuyuki*; Iwase, Akihiro*; Nishiyama, Yutaka

Proceedings of 2014 Nuclear Plant Chemistry Conference (NPC 2014) (USB Flash Drive), 9 Pages, 2014/10

no abstracts in English

Journal Articles

New instrumentation using a heat resistant FBG sensor installed by laser cladding

Nishimura, Akihiko; Terada, Takaya; Takenaka, Yusuke*; Furuyama, Takehiro*; Shimomura, Takuya

Proceedings of 22nd International Conference on Nuclear Engineering (ICONE-22) (DVD-ROM), 6 Pages, 2014/07

Since 2007, JAEA has been developing laser based technologies of structural health monitoring. The FBG sensor made by femtosecond laser processing will be the best candidate. To make the best use of the heat resistant characteristic, the FBG sensor was embedded in metal mold by laser cladding. A groove was processed to the surface of a SUS metal plate. We used a QCW laser to weld a filler wire on the plate. A series of weld beads perfectly formed a sealing clad on the groove. Though the FBG sensor was buried tightly, no degradation on the reflection spectrum was detected after the processing. The FBG sensor could detect the vibration of the plate caused by impact shocks and audio vibration. The reflection peak of the FBG sensor under laser cladding condition was shifted to be 6 nm. We demonstrated that the corresponded temperature derive from the reflection peak shift reached 600 degrees in heat shock experiments. The installation procedure of a FBG sensor using a portable laser cladding machine was described.

Journal Articles

Development of an innovative integrator being resistant to an excessive high voltage input at plasma instabilities

Kawamata, Yoichi; Yonekawa, Izuru; Kurihara, Kenichi

Heisei-16-Nendo Osaka Daigaku Sogo Gijutsu Kenkyukai Hokokushu (CD-ROM), 4 Pages, 2005/03

no abstracts in English

Journal Articles

In-core ECP sensor designed for the IASCC experiments at JMTR

Tsukada, Takashi; Miwa, Yukio; Ugachi, Hirokazu; Matsui, Yoshinori; Itabashi, Yukio; Nagata, Nobuaki*; Dozaki, Koji*

Proceedings of International Conference on Water Chemistry of Nuclear Reactor Systems (CD-ROM), 5 Pages, 2004/10

IASCC initiation and propagation tests will be performed on the per-irradiated specimen in the Japan Materials Testing Reactor (JMTR). Since in core, the radiolysis of water causes a generation of various kind of radical species and some oxidizing species such as hydrogen peroxide, the water chemistry in irradiation capsules must be assessed by measurements of the electrochemical corrosion potential (ECP). For the in-core measurement of ECP in JMTR, we fabricated and tested the Fe/Fe$$_{3}$$O$$_{4}$$ type ECP sensor. After the fabrication, the function of each sensor was examined in high temperature water by out-of-core thermal cycling and high temperature holding tests.

Journal Articles

Journal Articles

Journal Articles

Vapor response properties of conducting composites prepared from crystalline oligomer-grafted carbon black

Chen, J.*; Tsubokawa, Norio*; Maekawa, Yasunari; Yoshida, Masaru

Carbon, 40(9), p.1597 - 1617, 2002/08

 Times Cited Count:20 Percentile:25.86

no abstracts in English

JAEA Reports

Development of magnetic j$$times$$B sensor

Kasai, Satoshi; Nakayama, Takahide*; Ishitsuka, Etsuo

JAERI-Tech 2001-082, 23 Pages, 2001/12

JAERI-Tech-2001-082.pdf:2.54MB

The improved mechnical sensor, j$$times$$B has been desiged and developed. Materials of a load cell (strain gauge and sensor beam) and sensing coil/frame are selected to be neutron resistance. In order to reduce temperature drift of the sensor signal, four strain gauges with the same electrical property and geometrical size are bonded on the sensor beam by Al$$_{2}$$O$$_{3}$$ spraying process. These gauges form an electrical bridge circuit. The zero-level drift of the output of the load cell was reduced to about 1/20 compared with the old sensor. Non-linearity of the output of load cell and sensitivity of the j$$times$$B sensor was observed. The deviation of sensitivity from the fitting line was less than 7 % in high magnetic field region. The sensitivity of the sensor was gradually decreased by about 30 % at neutron fluence of (1.8$$sim$$2.8)$$times$$10$$^{23}$$ n/m$$^{2}$$ in high magnetic field region.

Journal Articles

Temperature-switchable vapor sensor materials based on ${it N}$-isopropylacrylamide and calcium chloride

Chen, J.; Yoshida, Masaru; Maekawa, Yasunari; Tsubokawa, Norio*

Polymer, 42(23), p.9361 - 9365, 2001/11

 Times Cited Count:30 Percentile:26.55

no abstracts in English

Journal Articles

Laser-induced implantation of organic molecules into sub-micrometer regions of poymer surfaces

Goto, Masahiro; Hobley, J.; Kawanishi, Shunichi; Fukumura, H.

Applied Physics A, 69(suppl.), p.S257 - S261, 1999/12

 Times Cited Count:8 Percentile:57.73(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Instantaneous measurement system of the effective photon energy for a single shot X-ray pulse radiation

Ozu, Akira; Ito, Kazunori*; Matoba, Toru; Kawanishi, Shunichi; Arisawa, Takashi

Review of Scientific Instruments, 70(9), p.3776 - 3777, 1999/09

 Times Cited Count:1 Percentile:78.37(Instruments & Instrumentation)

no abstracts in English

JAEA Reports

High $$gamma$$-rays irradiation tests of critical components for ITER (International Thermonulear Experimental Reactor) in-vessel remote handling system

Obara, Kenjiro; Kakudate, Satoshi; Oka, Kiyoshi; *; *; Koizumi, Koichi; Shibanuma, Kiyoshi; Yagi, Toshiaki; Morita, Yosuke; ; et al.

JAERI-Tech 99-003, 312 Pages, 1999/02

[This article is unavailable to download the full text due to various reasons.]

JAEA Reports

Development of steady state magnetic sensor

*; Nagashima, Akira; *; Kasai, Satoshi

JAERI-Tech 98-057, 12 Pages, 1998/12

JAERI-Tech-98-057.pdf:0.84MB

no abstracts in English

Journal Articles

Analysis of a nuclear pumped lasing mechanism for application to nuclear radiation measurements

*; Nakazawa, Masaharu*; ; Kakuta, Tsunemi; ; Katagiri, Masaki

Nuclear Instruments and Methods in Physics Research A, 389, p.513 - 522, 1997/00

 Times Cited Count:1 Percentile:76.11

no abstracts in English

JAEA Reports

Development of oxygen sensing technology in an irradiated fuel rod; Characteristic test of oxygen sensor

Saito, Junichi; Hoshiya, Taiji; ;

JAERI-Tech 96-015, 58 Pages, 1996/03

JAERI-Tech-96-015.pdf:1.66MB

no abstracts in English

JAEA Reports

Irradiation tests of critical components for remote handling system in gamma radiation environment

Obara, Kenjiro; Kakudate, Satoshi; Oka, Kiyoshi; Furuya, Kazuyuki; *; Tada, Eisuke; Shibanuma, Kiyoshi; Koizumi, Koichi; Okawa, Yoshinao; Morita, Yosuke; et al.

JAERI-Tech 96-011, 111 Pages, 1996/03

JAERI-Tech-96-011.pdf:5.9MB

no abstracts in English

37 (Records 1-20 displayed on this page)