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JAEA Reports

The Operation manual of the Breath-Mass with a quadrupole mass spectrometer

Hiratsuka, Hajime; Hatano, Toshihisa; Abe, Tetsuya

JAEA-Testing 2013-001, 42 Pages, 2013/05

JAEA-Testing-2013-001.pdf:7.71MB
JAEA-Testing-2013-001(errata).pdf:0.08MB

The Breath-Mass was put in practical use in the development of the gas analysis technology with quadrupole mass specrometer. Features of the Breath-Mass are measurement at short time, high sensitivity and reproducibility. Moreover, on-site measurement was added to features and application of the Breath-Mass in various fields was aimed at. In development of application, lectures of operation with the instrument were required. This report was summarized as operation manual whose contents ware handling, measurement and maintenance.

Journal Articles

Promotion of the gas analysis technology by Breath-Mass

Hiratsuka, Hajime; Hatano, Toshihisa; Abe, Tetsuya

Heisei-24-Nendo Kyoto Daigaku Sogo Gijutsu Kenkyukai Hokokusho (CD-ROM), 3 Pages, 2013/03

no abstracts in English

Journal Articles

Vacuum leak hunting management by using Breath-Mass

Hiratsuka, Hajime; Hatano, Toshihisa; Abe, Tetsuya

Heisei-23-Nendo Kiki, Bunseki Gijutsu Kenkyukai Hokoku, p.64 - 65, 2011/09

JP, H16-234010   Licensable Patent Information Database   Patent publication (In Japanese)

no abstracts in English

Journal Articles

Development of gas analyzer to aim for speed and high sensitivity and shaping of mass spectrum

Hatano, Toshihisa; Hiratsuka, Hajime; Abe, Tetsuya

Journal of the Vacuum Society of Japan, 54(9), p.474 - 477, 2011/09

JP, H16-234010   Licensable Patent Information Database   Patent publication (In Japanese)

This study focused on more reproducible pumping time constant of vacuum devices. The mass spectrum measured in non-steady state was corrected with a mathematical technique corresponding to constant pressure in steady state. The correction mass spectrum was evaluated from the viewpoint of the gas analysis. In measuring the sample gas was a pulse gas injection. After injection the gas pressure decreases exponentially. Here was confirmed reproducible pumping time constant by pulsing gas injection and investigated influence of the pumping time constant to the correction mass spectrum. N$$_{2}$$, O$$_{2}$$, Ar, CO$$_{2}$$ were measured the above method and analyzed. The correction mass spectrum showed use from the comparison with mass spectrum in The National Institute of Standards and Technology (NIST) mass spectra library as for the analysis enough.

Journal Articles

Performance testing of vapor-liquid equilibrium type of gas permeation source with vacuum balance

Hatano, Toshihisa; Hiratsuka, Hajime; Hasegawa, Koichi; Kaifuku, Yuichiro*; Abe, Tetsuya

Journal of the Vacuum Society of Japan, 54(5), p.313 - 316, 2011/05

In the quantitative measure of air pollution gas and impurity gas in the aluminum recycle material etc, it is requested to show the amount of the gas directly by the weight value from the viewpoint of global standard. Therefore, standard gas sources expressed in units of weight are needed. The vapor-liquid equilibrium type of gas permeation sources (hereafter "P-tube") is used well in the atmosphere as calibration gas of the measuring equipment and a standard gas source for low concentration of gas. The study aims to estimate performance of P-tubes in the vacuum. Specifically, weight change of P-tubes were measured with the vacuum balance and at the same time concentration of gas constituents were also measured by Electron Ionization-Quadrupole Mass Spectrometer (hereafter, EI-QMS). The relation of both was examined. The prospect was obtained that the P-tube was able to be used as a standard gas source in the vacuum though the warming was needed.

Journal Articles

Response of fusion gain to density in burning plasma simulation on JT-60U

Takenaga, Hidenobu; Kubo, Hirotaka; Sueoka, Michiharu; Kawamata, Yoichi; Yoshida, Maiko; Kobayashi, Shinji*; Sakamoto, Yoshiteru; Iio, Shunji*; Shimomura, Koji*; Ichige, Hisashi; et al.

Nuclear Fusion, 48(3), p.035011_1 - 035011_6, 2008/03

 Times Cited Count:2 Percentile:89.9(Physics, Fluids & Plasmas)

A burning plasma simulation scheme has been developed with consideration for temperature dependence of the DT fusion reaction rate in JT-60U. The heating power for the simulation of alpha particle heating was calculated using real-time measurements of density and ion temperature. Response of a simulated fusion gain to the density was investigated in this scheme with constant heating power for the simulation of external heating, in order to understand burn controllability by the fuel density in a fusion reactor. When temperature dependence of the fusion reaction rate was assumed as square of ion temperature, density dependence of the simulated fusion gain stronger than square of density was observed. Transport analysis using a 1.5 dimension transport code indicated that the strong density dependence is induced due to both change in a confinement improvement factor and change in a pressure profile.

Journal Articles

Burn control simulation experiments in JT-60U

Shimomura, Koji*; Takenaga, Hidenobu; Tsutsui, Hiroaki*; Mimata, Hideyuki*; Iio, Shunji*; Miura, Yukitoshi; Tani, Keiji; Kubo, Hirotaka; Sakamoto, Yoshiteru; Hiratsuka, Hajime; et al.

Fusion Engineering and Design, 82(5-14), p.953 - 960, 2007/10

 Times Cited Count:2 Percentile:79.76(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Measurement of expiratory alcohol by QMS gas analyzer

Arai, Takashi; Hiratsuka, Hajime; Hasegawa, Koichi; Hatano, Toshihisa; Nemoto, Masahiro; Abe, Tetsuya

Heisei-18-Nendo Nagoya Daigaku Sogo Gijutsu Kenkyukai Sochi Gijutsu Kenkyukai Hokokushu, p.76 - 79, 2007/03

Recently, the accident because of drunken driving is taken up in the topic of news, and the concern is had at the amount of the drinking and the drinking time etc. of the inside of the body. It is said that there is a correlation in the alcoholic density included in an alcoholic amount and the expiration in blood so far, and is reported on the equipment that measures an alcoholic density of the expiration based on this. We also are executing the breath analysis as an example of applying QMS (four pile polar mass spectrometer) gas analyzer "Gravimas". This time, an alcoholic density in the expiration was measured, the performance of this device to alcoholic detection was examined, and the change at the time of an alcoholic density in the expiration high sensitivity was measured. These results suggest the utility of the breath analysis that uses QMS.

Journal Articles

Development of breath gas and skin excretion gas analysis technology using quadrupole mass spectrometer

Hiratsuka, Hajime; Abe, Tetsuya; Nemoto, Masahiro; Hasegawa, Koichi; Arai, Takashi; Hatano, Toshihisa

Heisei-18-Nendo Kiki, Bunseki Gijutsu Kenkyukai Hokoku, p.163 - 166, 2006/09

JP, H16-234010   Licensable Patent Information Database   Patent publication (In Japanese)

no abstracts in English

Journal Articles

Development of a electrical balance separating from atmosphere

Hasegawa, Koichi; Abe, Tetsuya; Nemoto, Masahiro; Hiratsuka, Hajime; Arai, Takashi; Hatano, Toshihisa

Heisei-18-Nendo Kiki, Bunseki Gijutsu Kenkyukai Hokoku, p.169 - 172, 2006/09

JP, H16-304402   Licensable Patent Information Database   Patent publication (In Japanese)

no abstracts in English

Journal Articles

Burn control study using burning plasma simulation experiments in JT-60U

Takenaga, Hidenobu; Miura, Yukitoshi; Kubo, Hirotaka; Sakamoto, Yoshiteru; Hiratsuka, Hajime; Ichige, Hisashi; Yonekawa, Izuru*; Kawamata, Yoichi; Iio, Shunji*; Sakamoto, Ryuichi*; et al.

Fusion Science and Technology, 50(1), p.76 - 83, 2006/07

 Times Cited Count:3 Percentile:73.58(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Development of breath gas analysis technology using quadrupole mass spectrometer

Hiratsuka, Hajime; Arai, Takashi; Hasegawa, Koichi; Nemoto, Masahiro; Abe, Tetsuya

Dai-17-Kai Bunshi Kagaku Kenkyusho Gijutsu Kenkyukai Hokokushu (CD-ROM), 4 Pages, 2006/03

JP, H16-258288   Patent publication (In Japanese)

no abstracts in English

Journal Articles

Remodeling of pellet injector with the screw extruder set

Ichige, Hisashi; Hiratsuka, Hajime; Takenaga, Hidenobu; Matsuzawa, Yukihiro; Haga, Saburo; Miya, Naoyuki

Dai-17-Kai Bunshi Kagaku Kenkyusho Gijutsu Kenkyukai Hokokushu (CD-ROM), 4 Pages, 2006/03

no abstracts in English

Journal Articles

Impacts of particle fuelling on confinement and pedestal parameter in JT-60U

Takenaga, Hidenobu; Oyama, Naoyuki; Urano, Hajime; Kamiya, Kensaku; Miyo, Yasuhiko; Nishiyama, Tomokazu; Sasajima, Tadayuki; Masaki, Kei; Hiratsuka, Hajime; Ichige, Hisashi; et al.

Europhysics Conference Abstracts (CD-ROM), 30I, 4 Pages, 2006/00

no abstracts in English

Journal Articles

Improvement of a pellet cutting and loading device for the JT-60

Ichige, Hisashi; Hiratsuka, Hajime; Honda, Masao; Miya, Naoyuki

Heisei-14-Nendo Tokyo Daigaku Sogo Gijutsu Kenkyukai Gijutsu Hokokushu, p.2_91 - 2_93, 2003/03

no abstracts in English

Journal Articles

Insulation resistance measurement for the toroidal field coils of JT-60

Nishiyama, Tomokazu; Arai, Takashi; Miyo, Yasuhiko; Hiratsuka, Hajime; Honda, Masao; Miya, Naoyuki

Heisei-14-Nendo Tokyo Daigaku Sogo Gijutsu Kenkyukai Gijutsu Hokokushu, p.2_28 - 2_30, 2003/03

no abstracts in English

JAEA Reports

Development of fast action gate valve for the JT-60 Pellet Injector

Hiratsuka, Hajime; Ichige, Hisashi; Kizu, Kaname; Honda, Masao; Miya, Naoyuki

JAERI-Tech 2002-076, 37 Pages, 2002/10

JAERI-Tech-2002-076.pdf:2.53MB

no abstracts in English

Journal Articles

Wall conditioning and experience of the carbon-based first wall in JT-60U

Masaki, Kei; Yagyu, Junichi; Arai, Takashi; Kaminaga, Atsushi; Kodama, Kozo; Miya, Naoyuki; Ando, Toshiro; Hiratsuka, Hajime; Saido, Masahiro

Fusion Science and Technology (JT-60 Special Issue), 42(2-3), p.386 - 395, 2002/09

 Times Cited Count:8 Percentile:49.58(Nuclear Science & Technology)

The wall conditioning of JT-60U consists of the 300$$^{circ}$$C baking, He-TDC, He-GDC, tokamak discharge cleaning and boronization. Using these methods, total pressure of the vacuum vessel reached finally 10$$^{-6}$$ $$sim$$ 10$$^{-5}$$ Pa. The oxygen impurity was decreased to $$sim$$0.5%. The experience with the carbon-based first wall showed that taper shaping is effective to reduce the local heat concentration to the tile edges. The observed poloidal asymmetric deposition of carbon on the divertor region implies that the carbon impurity produced in the outer divertor contributes to the deposition on the inner divertor. In 1992 and 1993, the B$$_{4}$$C converted CFC tiles were installed in the outer divertor to reduce chemical sputtering of CFC tiles and oxygen impurity. The reduction was successfully demonstrated with the B$$_{4}$$C converted CFC tiles. In order to understand the tritium behavior in JT-60U, tritium in the first wall and the exhaust gas were measured. The estimated tritium inventory in the first wall was $$sim$$50% of the generated tritium.

Journal Articles

Gas and pellet injection systems for JT-60 and JT-60U

Kizu, Kaname; Hiratsuka, Hajime; Miyo, Yasuhiko; Ichige, Hisashi; Sasajima, Tadayuki; Nishiyama, Tomokazu; Masaki, Kei; Honda, Masao; Miya, Naoyuki; Hosogane, Nobuyuki

Fusion Science and Technology (JT-60 Special Issue), 42(2-3), p.396 - 409, 2002/09

 Times Cited Count:4 Percentile:69.07(Nuclear Science & Technology)

Designs and operations of the gas system and pellet injection systems for JT-60 were described. A gas injection valve that is a key component of the gas injection system was developed using a multi layer piezoelectric element. The maximum flow rate of this system is 43.3 Pam3/s. The valve has mechanism for adjustment at atmospheric side meaning that a repair and an adjustment can be conducted without ventilation inside a vacuum vessel. Two systems of pellet injector; one is pneumatic drive and another is centrifugal one were developed. The pneumatic type attained a pellet velocity of 2.3 km/s, which was the world record at the time in 1988. On the other hand, the centrifugal one was developed in 1998. This injector can eject trains of up to 40 cubic (2.1 mm)3 pellets at frequencies of 1~10 Hz and speed of 0.1~1.0 km/s. A guide tube for a magnetic high field side top injection HFS(top)) was also developed in 1999. The pellet injection experiment with the HFS system started in 2000. In addition, another guide tube for HFS(mid) injection was newly developed and installed in March 2001.

Journal Articles

Countermeasures against the electoric noise in the JT-60 gas injection system

Miyo, Yasuhiko; Hiratsuka, Hajime; Iwahashi, Takaaki*; Honda, Masao

NIFS-MEMO-36, p.339 - 342, 2002/06

no abstracts in English

77 (Records 1-20 displayed on this page)