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論文 - 中村　真季

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六角形状セル構造ディーゼル微粒子フィルター(HEX DPF)によるスス堆積の数値シミュレーション査読有り

中村真季, 花村克悟, 渋田匠

自動車技術会論文集 46 巻 ( 2 ) 頁： 313 - 317 2015年3月

担当区分：筆頭著者記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：自動車技術会

HEX DPF はinlet/outlet とinlet/inlet の壁面が存在する．壁面に堆積したススが酸化される時，in/in 表面のススの酸化が完了し，その後in/out 表面のススが酸化し終え，時間と共に燃焼範囲が変化することを可視化から明らかにした．Darcy's law を使用したモデルから，その酸化過程が壁面への流量配分によることを明らかにした．

DOI： 10.11351/jsaeronbun.46.313

CiNii Books

Flow Analysis during Soot Trapping on Aluminum Titanate Ceramics Filter with Hexagonal Cell Geometry 査読有り

Maki NAKAMURA, Katsunori Hanamura, Takumi Shibuta, Kentaro Iwasaki, Hajime Yoshino

International Journal of Automotive Engineering (IJAE) 6 巻 ( 1 ) 頁： 31-37 2015年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

The phenomena of soot trapping and oxidation in a hexagonal cell geometry DPF made of aluminum titanium oxide were investigated through microscopic visualization experiment and a simple analysis based on Darcy's law through the wall and the deposited soot layer. There were two types of flow: one was a flow through a wall between inlet and outlet channels (inlet/outlet wall flow), and the other was a flow which was introduced into a wall between inlet and inlet channels, and was turned toward the direction parallel to the wall, and finally exited into the outlet channel (bypass flow). The flow rate of the bypass flow was increased with a thickness of soot layer deposited on the inlet/outlet wall. As a result, the soot was trapped even on the inlet/inlet wall surface. In the regeneration process, depending on the flow rate of the bypass flow, the maximum temperature for the hexagonal cell DPF became lower compared with that for the conventional DPF.

DOI： https://doi.org/10.20485/jsaeijae.6.1_31

Variation in resonant frequency of piezoelectric lead-zirconate-titanate element undergoing high-level radiation 査読有り

Masanori Kobayashi, Takashi Miyachi, Seiji Takechi, Tomoaki Mitsuhashi, Yoshinori Miura, Hiromi Shibata, Nagaya Okada, Maki Hattori, Osamu Okudaira, Masayuki Fujii, Takeshi Murakami, Yukio Uchihori

JAPANESE JOURNAL OF APPLIED PHYSICS 53 巻 ( 6 ) 2014年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IOP PUBLISHING LTD

A piezoelectric lead-zirconate-titanate (PZT) element was exposed to a 400MeV/n xenon beam and the radiation effect on the element was studied as a variation of resonant and antiresonant frequencies by the resonance method. A possible effect of heating the element on the resonant frequency was avoided by using data obtained while the temperature of the element was kept constant. Consequently, the variation of the resonant frequency was empirically represented by a simple function of the amount of accumulated energy in the element. We therefore discuss the piezoelectric PZT element as a potential detector for high-level radiation. We point out that a piezoelectric equation including the heat term is required to explain the experimental results. (C) 2014 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.53.066602

Web of Science

Output characteristics of piezoelectric lead zirconate titanate detector using high-energy heavy-ion beam 査読有り

Seiji Takechi, Masahiro Sekiguchi, Takashi Miyachi, Masanori Kobayashi, Maki Hattori, Osamu Okudaira, Hiromi Shibata, Masayuki Fujii, Nagaya Okada, Takeshi Murakami, Yukio Uchihori

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 737 巻頁： 52 - 55 2014年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

A radiation detector fabricated using piezoelectric lead zirconate titanate (PZT) has been studied by irradiating it with a 400 MeV/n xenon (Xe) beam. The beam diameter was controlled to change the irradiation conditions. It was found that the magnitude of the output observed from the PZT detector may be related to the number of Xe ions per unit area per unit time within the limits of the experimental conditions. (C) 2013 Elsevier B.V. All rights reserved

DOI： 10.1016/j.nima.2013.11.029

Web of Science

Study of Deterioration in a Piezoelectric Lead Zirconate Titanate Radiation Detector through Measurement of the Electromechanical Coupling Factor with 400 MeV/n Zenon Ions 査読有り

Masanori Kobayashi, Takashi Miyachi, Seiji Takechi, Masahiro Sekiguchi, Hiromi Shibata, Nagaya Okada, Maki Hattori, Osamu Okudaira, Masayuki Fujii, Takeshi Murakami, Yukio Uchihori

JAPANESE JOURNAL OF APPLIED PHYSICS 52 巻 ( 12 ) 2013年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IOP PUBLISHING LTD

The variation of the electromechanical coupling factor (ECF) was measured by bombarding a piezoelectric lead zirconate titanate (PZT) element with 400 MeV/n xenon ions. The element was exposed to energies up to 10(4) J, during which time the ECF was observed by the resonance method. The ECF gradually decreased with the energy accumulated during irradiation, and its behavior was scaled with an empirical formula. This decrease suggests that the piezoelectric quality deteriorated; hence, the sensitivity of the PZT radiation detector was considered to be degraded as well. The variation ultimately originated in resonance-associated processes. A potential detector suitable for use in severe-radiation environments was discussed. (C) 2013 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.52.126604

Web of Science

Dust detector using piezoelectric lead zirconate titanate with current-to-voltage converting amplifier for functional advancement 査読有り

Kobayashi, Masanori ; Miyachi, Takashi ; Hattori, Maki ; Sugita, Seiji ; Takechi, Seiji ; Okada, Nagaya

Earth, Planets and Space 2013年3月

Influence of a Polyimide Surface Layer on the Piezoelectric Response of Lead-Zirconate-Titanate Cosmic Dust Detector 査読有り

Maki Hattori, Masanori Kobayashi, Takashi Miyachi, Seiji Takechi, Osamu Okudaira, Takeo Iwai, Nagaya Okada, Seiji Sugita

JAPANESE JOURNAL OF APPLIED PHYSICS 52 巻 ( 2 ) 2013年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IOP PUBLISHING LTD

The influence of a thermal reflector on the sensitivity of a lead-zirconate-titanate element is studied by bombarding the element with hypervelocity microparticles. The reflector is a 60-mu m-thick layer made of polyimide resin that coats the surface of the element. By applying the fast Fourier transform method to data analysis, impact information is obtained through the fundamental resonant component. As a result, the sensitivity of the element is considerably reduced by the reflector. In addition, it is found that the sensitivity is substantially position-independent. (C) 2013 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.52.028002

Web of Science

Position-Dependent Behavior of Piezoelectric Lead-Zirconate-Titanate Cosmic Dust Detector 査読有り

Maki Hattori, Masanori Kobayashi, Takashi Miyachi, Seiji Takechi, Osamu Okudaira, Takeo Iwai, Seiji Sugita

JAPANESE JOURNAL OF APPLIED PHYSICS 51 巻 ( 9 ) 2012年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：JAPAN SOC APPLIED PHYSICS

A possible position dependence of the signal amplitudes generated by a piezoelectric lead-zirconate-titanate (PZT) detector was studied by bombarding the PZT element with hypervelocity microparticles. The detector was equipped with a set of asymmetrically arranged electrodes. The characteristic features of the element were analyzed using the amplitudes of the fundamental resonant component caused by collisions. As a result, the sensitivity of the element measured with direct collisions onto the collector was found to be one order of magnitude greater than that in the external area of the collector. (C) 2012 The Japan Society of Applied Physics

DOI： 10.1143/JJAP.51.098004

Web of Science

Laboratory experiments on crater scaling-law for sedimentary rocks in the strength regime 査読有り

22) Suzuki, A., S. Hakura, T. Hamura, M. Hattori, R. Hayama, T. Ikeda, H. Kusuno, H. Kuwahara, Y. Muto, K. Nagaki, R. Niimi, Y. Ogata, T. Okamoto, T. Sasamori, C. Sekigawa, T. Yoshihara, S. Hasegawa, K. Kurosawa, T. Kadono, A. M. Nakamura, S. Sugita, and M. Arakawa

2012年8月

A future observational plan of dust particles around the Moon by LDM (Lunar Dust Monitor) onboard the orbiter of the next Japanese lunar mission

Kobayashi Masanori, Ohashi Hideo, Sasaki Sho, SHIBATA Hiromi, IWAI Takeo, FUJII Masayuki, NOGAMI Ken-ichi, KIMURA Hiroshi, NAKAMURA Maki H., HIRAI Takayuki, SRAMA Ralf, GRUN Eberhard

Earth, planets and space 63 巻 ( 10 ) 頁： 1113-1117 2011年10月

A future observational plan of dust particles around the Moon by LDM (Lunar Dust Monitor) onboard the orbiter of the next Japanese lunar mission 査読有り

Kobayashi, M; Ohashi, H; Sasaki, S; Shibata, H; Iwai, T; Fujii, M; Nogami, K; Kimura, H; Nakamura, MH; Hirai, T; Srama, R; Grün, E

EARTH PLANETS AND SPACE 63 巻 ( 10 ) 頁： 1113 - 1117 2011年

Effect of Heating and Cooling on the Piezoelectric Properties of a PZT Sensor for Mercury Dust Monitor 査読有り

24) Takeo IWAI, Maki NAKAMURA, Hideo OHASHI, Hiromi SHIBATA, Takashi MIYACHI, Seiji TAKECHI, Hajime YANO, Sho SASAKI, Masayuki FUJII, Ken-ichi NOGAMI, Eberhard GRÜN and Ralf SRAMA

Trans. JSASS Aerospace Tech. Japan 2010年

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