Výsledky vyhledávání - "Yasuji Izawa"

Localized Residual Heat and Formation of Nonbranched Positive Streamer With Highly Repetitive Streamer Discharge

Autor: Yasuji Izawa, Ryo Sasamoto, Kiyoto Nishijima, Tomohiro Omori, Takao Matsumoto, Takeshi Ihara

Publikováno v: IEEE Transactions on Plasma Science. 44:113-120

The mechanism of a mode change from a branch-type to a nonbranch positive streamer with increase in pulse repetition rate was investigated from the point of view of background gas heating. In this experiment, a repetitive streamer was generated betwe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c055f06209579104e92d3b0a4b9f3353
https://doi.org/10.1109/tps.2015.2499259

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Electron and Ion Swarm Parameters in Gas Mixtures of Ar, He with Dry Air by Pulsed Leaser-Induced Plasma Method

Autor: Yasuji Izawa, Kiyoto Nishijima, Ryo Sasamoto, R. Nomiyama, N. Tanaka

Publikováno v: 2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP).

We measured electron and ion swarm parameters in gas mixtures of Ar or He with Dry Air at atmospheric pressure. This paper presents the average drift velocity of three kinds of charged particles and the effective ionization coefficient of electrons u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::edd5338a87ef53a96709183f994935e0
https://doi.org/10.1109/ceidp.2018.8544915

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Difference of Discharge Phenomena under GFRP and CFRP Insulation Barrier with Steep Impulse Voltage

Autor: Kiyoto Nishijima, D. Aoyagi, Yasuji Izawa, Ryo Sasamoto, N. Tanaka

Publikováno v: 2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP).

Recently, many researchers focus on glass fiber reinforced plastic (GFRP) and carbon fiber reinforced plastic (CFRP) materials because these materials have superior mechanical properties. Therefore, their electrical insulation performance must be rev

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::eea9375a97308ddef70dd33a2ea71642
https://doi.org/10.1109/ceidp.2018.8544753

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Laser charging effect on metallic particle inserted between positive DC sphere and plane in air gap

Autor: Ryo Sasamoto, Kiyoto Nishijima, Yasuji Izawa, Ryoji Nomiyama

Publikováno v: 2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP).

High-voltage equipment needs to withstand various environments. It is well known that charged body between electrodes affects insulation performance. In the worst case, the charged body caused electrical breakdown. Therefore, it is necessary to study

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1fabb8e5b0e4a2090fd04640cce30594
https://doi.org/10.1109/ceidp.2017.8257463

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Developing speed of surface discharge on quartz glass plate having backside electrode

Autor: D. Aoyagi, Yasuji Izawa, Ryo Sasamoto, Kiyoto Nishijima

Publikováno v: 2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP).

Surface discharge transforms flashover through streamer to leader. Flashover causes damage to electric equipment and fire accident. Therefore, surface discharge velocity and distance have been researched by using Dust Figure and Lichtenberg Figure me

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cbd2696a20aa8adf0862ebbb632ffbc0
https://doi.org/10.1109/ceidp.2017.8257499

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Gas Heating and Formation of Single Linear Discharge Channel on Repetitive Branched Streamer Corona

Autor: Yasuji Izawa, Takao Matsumoto, Kiyoto Nishijima, Koji Kijima, Toshiharu Shimoju, Yoichi Inada

Publikováno v: Electrical Engineering in Japan. 190:10-16

SUMMARY Under a nonuniform field in an atmospheric short gap, a branched pulse streamer corona changes to a single filamentary discharge (SFD) for a split second just before sparkover occurs. This SFD is a pretransitional phenomenon of sparkover. The

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cfd3df54c03a1cd680e7d30c8209e1f5
https://doi.org/10.1002/eej.22675

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