Zobrazeno 1 - 10 of 87 pro vyhledávání: '"Osamu Fukumasa"'
1
Practice of Energy and Environment Education through Student Laboratory in Electrical Engineering
Autor: Osamu Fukumasa, Shinichi Mitsumoto
Publikováno v: IEEJ Transactions on Fundamentals and Materials. 131:596-601
It is well known that consumption of all energies in the world leads to environmental degradation. In terms of using electricity, the emission of CO2 by steam power generation is serious problem. It is therefore considered that the education with reg
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9783ffbeec2ad441c9e6fbe1c5533183
https://doi.org/10.1541/ieejfms.131.596
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2
The Effect of Mercury on Damage to Cold Cathode Fluorescent Lamp Electrodes
Autor: Hidetoshi Yano, Tadao Uetsuki, Naoki Aoyama, Takuma Ohira, Yuji Takeda, Osamu Fukumasa
Publikováno v: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN. 94:135-140
Two kinds of the cold cathode fluorescent lamps (CCFLs) were operated at 5 mA as a life-test with Ni plate electrodes. One kind of CCFL contained Ne-Ar-Hg (Hg CCFL) and the other contained Ne-Ar (Hg-less CCFL). The results of the operations showed th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e6c9041734370ef7ba01db5b8d3c15a
https://doi.org/10.2150/jieij.94.135
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4
Influence of Mercury on the Characteristics of Hot Cathode Lamps and Cold Cathode Lamps
Autor: Yuuji Takeda, Tadao Uetsuki, Takuma Ohira, Osamu Fukumasa
Publikováno v: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN. 92:775-782
Discharge lamps that have electrodes are classified into two categories, hot cathode lamps (HCLs) and cold cathode lamps (CCLs). We investigated the relationship between the presence of Hg, the kinds of rare gases present, and the cathode fall voltag
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6c72ccaed1f8da524cdeac04fa2dc81b
https://doi.org/10.2150/jieij.92.775
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5
Characteristics of Thermionic Emission from Emissive Oxides
Autor: Minoru Myojo, Osamu Fukumasa
Publikováno v: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN. 92:769-774
Characteristics of thermionic emission from emissive oxides were investigated by using experimental data of work function measurement of commercial fluorescent lamp electrodes presented in our previous paper. Our aims are as follows: first, to reconf
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4cc349d8cfff07759ce149f965ebd7cf
https://doi.org/10.2150/jieij.92.769
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6
The Study on the Relation between the Cathode Fall Voltage and the Electrode Material of the CCL
Autor: Yuji Takeda, Osamu Fukumasa, Tadao Uetsuki, Ryota Kitamoto
Publikováno v: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN. 91:700-704
To improve the efficiency of the cold cathode lamp (CCL), it is important to select the optimum electrode material to reducing the cathode fall voltage (CFV). Furthermore, it is necessary to understand the relationship between the electrode material
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9b14f73a04198c1a31e7df8d0715c7c6
https://doi.org/10.2150/jieij.91.700
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7
Behaviors of Fast Primary Electrons with Collisional Effects Including Production of Vibrationally Excited Hydrogen Molecules in a Hydrogen Negative Ion Source for a NBI System
Autor: Shigefumi Mori, Osamu Fukumasa
Publikováno v: IEEJ Transactions on Fundamentals and Materials. 127:747-756
The relationship between enhancement of H- negative ion volume production and behaviors of fast primary electros are studied. Trajectories of fast primary electrons are calculated numerically, including collisional effects with hydrogen molecules. Ta
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ddef9067db306274bd4fc93fd5545b08
https://doi.org/10.1541/ieejfms.127.747
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8
Modelling of negative ion transport in caesium-seeded volume negative ion sources
Autor: Ryo Nishida, Osamu Fukumasa
Publikováno v: Nuclear Fusion. 46:S275-S280
Trajectories of H− ions are calculated numerically by solving the 3D motion equation, including effects of collisional destruction, elastic collisions and charge exchange collisions. According to these trajectories, the extraction probability of H
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7274a7dd02c8ee8d267ae0195a9c6bad
https://doi.org/10.1088/0029-5515/46/6/s07
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9
Measurement of Work Function of Practical Fluorescent Lamp Electrodes with Emissive Oxides
Autor: Minoru Myojo, Osamu Fukumasa
Publikováno v: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN. 89:236-244
In this paper we propose a method for measuring work function of practical fluorescent lamp electrodes with emissive oxides. The work function measurement is based on the matching between the zero-field thermionic emission currents and various dc lam
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f069ebe5d1aa9bfe87de654c9ecf6261
https://doi.org/10.2150/jieij.89.236
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10
Performance characteristics of forced constricted type plasma jet generator with divergent nozzle anode for processing
Autor: Akira Kobayashi, Katashi Osaki, Osamu Fukumasa, Satoru Fujimoto
Publikováno v: Vacuum. 73:365-371
In order to increase a jet power and an operating duration time of the forced constricted type plasma jet generator developed by authors, newly designed divergent nozzle anodes were developed. The diameter of nozzle anode changed in two steps, i.e. t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0cd5519ee24bdb48aea546a6bc00879a
https://doi.org/10.1016/j.vacuum.2003.12.056
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