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266 results on '"Namihira, T."'

2. Observation of Propagation Phenomenon of Air Discharge Penetrating Through Insulator Barrier in Discharge Path

Author

Araoka, N., Takamura, N., Sasaki, Y., Mizusaki, M., Matsuda, M., Namihira, T., Hanai, M., Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Martin, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, and Németh, Bálint, editor

Published
2020
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3. Observation of Discharge Phenomenon on Surface of Semi-conductive PET Films with Lightning Impulse Voltage

Author

Mizusaki, M., Araoka, N., Takamura, N., Sasaki, Y., Matsuda, M., Namihira, T., Hanai, M., Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Hirche, Sandra, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Liang, Qilian, Series Editor, Martin, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Möller, Sebastian, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zhang, Junjie James, Series Editor, and Németh, Bálint, editor

Published
2020
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6. Xenon discharge-produced plasma radiation source for EUV lithography

Author

Zhang, C.H., Lv, P., Zhao, Y.P., Wang, Q., Katsuki, S., Namihira, T., Horta, H., Imamura, H., Kondo, Y., and Akiyama, H.

Subjects
Ultraviolet radiation -- Usage, Xenon -- Usage, Xenon -- Properties, Semiconductor industry -- Equipment and supplies, Ablation (Vaporization technology) -- Methods, Ablation (Vaporization technology) -- Research, Semiconductor industry, Technology application, Business, Computers, Electronics, Electronics and electrical industries
Published
2010

7. A new application of underwater pulsed streamerlike discharge to transcriptional activation of retrotransposon of Porphyra yezoensis

Author

Douyan Wang, Xiaofei Lin, Hirayama, K., Zi Li, Ohno, T., Wenbo Zhang, Namihira, T., Katsuki, S., Takano, H., Takio, S., and Akiyama, H.

Subjects
Electric discharges -- Usage, Electric discharges through gases -- Usage, Porphyria -- Genetic aspects, Retrotransposons -- Research, Genetic transcription -- Analysis, Business, Chemistry, Electronics, Electronics and electrical industries
Published
2010

22. Ozone Generation in Dry Air Using Pulsed Discharges With and Without a Solid Dielectric Layer

Author

Samaranayake, W. J. M., Miyahara, Y., Namihira, T., Katsuki, S., Hackam, R., and Akiyama, H.

Subjects
Ozone -- Analysis, Electric discharges -- Analysis, Dielectrics -- Analysis, Alternating current -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

Energy efficient generation of ozone is very important because ozone is being used increasingly in a wide range of industrial applications. Ozonizers usually use dielectric barrier discharges and employ alternating current (ac) with consequent heat generation, which necessitates cooling. In the present study, very short duration pulsed voltage is employed resulting in reduced heating of the gas and discharge reactor A comparison of ozone generation in dry air using a coaxial concentric electrode system with and without a solid dielectric layer is reported. Two types of dielectric layers were employed, ceramic and polyvinylchloride (PVC). The effects of peak pulsed voltage (12.5 to 62 kV), reactor length (0.1 to 1 m), pulse repetition rate (25 to 400 pulses per second, pps), gas flow rate (1.5 to 3.0 1/min) and variation of the pitch length of the spiral wire forming the central electrode (5 to 10 mm) on the concentration and production yield of ozone (g/kWh) are reported. A comparison is made between the performance of discharge reactors with (ceramic reactor Type IIC and PVC reactor Type IIP) and without (reactor Type I) a dielectric layer, using the same electrode gap separation (15 mm) and reactor lengths (0.157 and 1 m). High production yields of ozone in dry air of ~ 122, 52 and 60 g/kWh were obtained when using, respectively ceramic, PVC, and no dielectric layer, for a fixed pulse rate of 100 pps, 1.5 1/min flow rate and for a relatively short length of the reactor of 157 mm.

Published
2001

23. Ozone Production Using Pulsed Dielectric Barrier Discharge in Oxygen

Author

Samaranayake, W. J. M., Miyahara, Y., Namihira, T., Katsuki, S., Hackam, R., and Akiyama, H.

Subjects
Ozone -- Testing, Dielectrics -- Research, Voltage -- Measurement, Business, Electronics, Electronics and electrical industries
Abstract

The production of ozone was investigated using a dielectric barrier discharge in oxygen, and employing short-duration pulsed power. The dependence of the ozone concentration (parts per million, ppm) and ozone production yield (g([O.sub.3])/kWh) on the peak pulsed voltage (17.5 to 57.9 kV) and the pulse repetition rate (25 to 400 pulses/s, pps) was investigated. In the present study, the following parameters were kept constant: a pressure of 1.01x[10.sup.5] Pa, a temperature of 26 [+ or -] 4 [degrees] C, a gas flow rate of 3.0 1/min and a gaseous gap length of 11 mm. A concentric coaxial cylindrical reactor was used. A spiral copper wire (1 mm in diameter) was wound on a polyvinylchloride (PVC) cylindrical configuration (26 mm in diameter) and placed centrally in a concentric coaxial electrode system with 4 mm thick PVC dielectric layer adjacent to a copper outer electrode of 58 mm in internal diameter. HV and current pulses were provided by a magnetic pulse compressor power source.

Published
2000

25. Pulsed Power Production of Ozone in 02/N2 iin a Coaxial Reactor without Dielectric Layer

Author

Samaranayake, W. J. M., Miyahara, Y., Namihira, T., Katsuki, S., Hackam, R., and Akiyama, H.

Abstract

Very short duration pulsed streamer discharges have been used to produce ozone in a gas mixture of nitrogen and oxygen at atmospheric pressure. The ratio of nitrogen to oxygen in the mixture was varied in the range from 2.5/0.5 to 0.5/2.5, while maintaining a total flow rate of 3 l/min. The production of ozone was found to be higher for a specific mixture ratio of N2/O2 than that in oxygen or in dry air. The production of ozone in O2 was higher than that in dry air. The production yield of ozone (g/kWh) increased with decreasing nitrogen in the O2/N2 mixture. It has been found that the peak of the streamer discharge current decreased with time after application of the pulsed power. This decrease in the current corresponded with the increase in the ozone production and is attributed to the loss of electrons in the discharge current due to their attachment to ozone to form negative ions.

Published
2001

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