巻号一覧
前身誌
135 巻, 3 号
選択された号の論文の13件中1～13を表示しています
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特集：パルス電磁エネルギーの先端技術への応用
特集論文
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伊藤 弘昭, 北島 一樹2015 年 135 巻 3 号 p. 136-141
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーWe have developed a new type of a pulsed ion beam accelerator named “bipolar pulse accelerator” for improvement of the purity of the intense pulsed ion beam. The system utilizes a magnetically insulated accelerate on gap and was operated with the bipolar pulse. A coaxial gas puff plasma gun was used as an ion source, which was placed inside of the grounded anode. Source plasma (nitrogen) of current density of ≈30 A/cm2 and pulse duration of ≈1.0 µs was injected into the acceleration gap. When the bipolar pulse of -114 kV, 70 ns (1st pulse) and 85 kV, 62 ns (2nd pulse) was applied to the drift tube, the ions were successfully accelerated from the grounded anode to the drift tube in the 1st gap by the negative pulse of the bipolar pulse. The pulsed ion beam with current density of 60 A/cm2 and pulse duration of ≈50 ns was obtained at 48 mm downstream from the anode surface. The energy spectrum of the ion beam was evaluated by a magnetic energy spectrometer. The ion energy was in reasonable good agreement with the acceleration voltage, i.e., 1st pulse (negative pulse) voltage of the bipolar pulse.抄録全体を表示PDF形式でダウンロード (692K) -
南谷 靖史, 豊岡 隆侍2015 年 135 巻 3 号 p. 142-148
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーThis work focuses on the design of a compact high power pulsed electromagnetic wave generator using a nanosecond pulsed power generator for the cancer treatment. In previous study, since the output voltage waveform of the pulsed power generator was damping oscillation, the duration of the burst pulse was under 100 ns. So the generator uses a magnetic switch instead of the gap switch and uses a SOS diode with current cutoff time of nanoseconds. The cluster pulse has 6 burst pulses that are repeated at 2 Mpps. The frequency of the burst pulse is 50 MHz. The peak output voltage is 7.5 kV.抄録全体を表示PDF形式でダウンロード (708K) -
木名瀬 裕基, 竹崎 太智, 高橋 一匡, 佐々木 徹, 菊池 崇志, 原田 信弘2015 年 135 巻 3 号 p. 149-154
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーWe investigated a hypersonic plasma flow generated by a taper-cone-shaped plasma focus device toward astrophysical phenomena. The effects of applied magnetic field on shock velocity were observed with a streak camera. From the dependence of shock deceleration on the magnetic field distribution with comparable plasma beta, the gradient of magnetic field affects the shock deceleration. To compare the shock behavior from the numerical simulation with the experimental results, we developed a one-dimensional hybrid particle-in-cell code. The results indicated that the magnetic field distribution affected the deceleration of the shock velocity. It means that the shock behaviors generated by the taper-cone-shaped plasma focus device are comparable to the numerical simulation.抄録全体を表示PDF形式でダウンロード (1163K) -
武脇 大樹, 本間 佑奈, 安西 信幸, 高橋 一匡, 佐々木 徹, 菊池 崇志, 原田 信弘2015 年 135 巻 3 号 p. 155-160
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーTo demonstrate repetitive-intense X-ray source by using pulsed-power discharge, we proposed an innovative X-pinch method using compact pulse generator and liquid metal injection. The compact pulse generator using small pulse-forming-network modules (PFNMs) has been developed. The current rising rate of the PFNMs with X-pinch system is over 0.1 kA/ns at low operation voltage. To suppress the expansion of liquid metal in a vacuum chamber, we have demonstrated liquid metal injection with coaxial supersonic flow generated by an aerospike nozzle. The results indicate that the expansion of liquid metal is suppressed with the coaxial supersonic flow.抄録全体を表示PDF形式でダウンロード (4280K)
特集研究開発レター
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Takashi Kikuchi, Kazuhiko Horioka2015 年 135 巻 3 号 p. 161-162
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーMaximum possible emittance growth in intense and nonuniform beams with a thermal equilibrium distribution during a transport in a focusing channel is theoretically indicated as a function of tune depression. Nonlinear field energy factor is expressed by a fitting function from results of analysis for the possible emittance growth. The possible emittance growth with thermal equilibrium distribution is rewritten by using the fitting function, and the derivative implies the maximum value of 1.0348 for tune depression of 0.1494.抄録全体を表示PDF形式でダウンロード (243K)
論文
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水野 統太, 久米 祐一郎2015 年 135 巻 3 号 p. 163-167
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーIn this study, we have investigated the interactions that inclination perception affected by visual stimulations. In virtual reality (VR) research and development activities, multimodal stimulations are presented to operators and observers, and the observed interactions and perceptions stimulated by those interactions are investigated. The results of those investigations are then used to enhance the VR experience effectiveness. Realities are improved by multi-modal displays featured with motion platform providing visual and inclination information. However, the inclination perception affected by visual stimulation has not been studied sufficiently. In this paper, we have investigated inclination perception in pitch direction affected by the size and velocity of visual objects and human postures. It was found that the velocity of visual objects increases the sensitivity of inclination perception more significantly than the size. In addition, larger interaction between the sight and somatic sensation was observed with sitting posture than with standing posture for the effective information presentation.抄録全体を表示PDF形式でダウンロード (833K) -
菊池 祐介, 福田 有貴, 永田 正義, 池上 知巳, 櫻井 孝幸, 吉満 哲夫2015 年 135 巻 3 号 p. 168-174
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーEffects of humidity and pre-discharges on repetitive partial discharge inception voltage (RPDIV) with twisted enameled wires under bipolar and unipolar impulse voltages have been investigated. The RPDIV under the bipolar impulse voltages have become relatively scattered during the early stage of the voltage sequence in the dry condition. After sufficient number of the voltage sequence, it has reached to a stable state. On the other hand, the RPDIV have reached to a stable state from the beginning of measurement in the humid condition. In the case of the unipolar impulse voltages, no scattered state of the RPDIV has been observed. Surface potential on the enameled wire after the discharge has been measured with a surface potential meter in order to clarify effects of pre-discharges on the RPDIV. As the results, the fluctuation in the RPDIV is associated with the accumulation of the surface charges generated by the discharges.抄録全体を表示PDF形式でダウンロード (991K) -
石黒 崇裕, 安岡 康一2015 年 135 巻 3 号 p. 175-181
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーThis study proposes an advanced oxidation process to rapidly decompose organic compounds in treatment water. In existing advanced oxidation processes, two •OHs, used as oxidizing agents, are often consumed to produce H2O2 without decomposing organic compounds. Our proposed process uses a combined ozone/plasma system with plasma in bubbles. The combined ozone/plasma system uses the O3 and H2O2 reaction to produce •OH. Nondimensional simulation implied that the decomposing rate would be maximized by equalizing the increasing rates of the dissolved O3 and H2O2 concentration. Organic compounds in waste water B, with a total organic carbon (TOC) concentration of 1180 mg/L, were almost completely eliminated in 480 minutes via the combined ozone/plasma treatment. The decomposition rate was 1.46×10-1 gTOC/L/h and the decomposition efficiency was 2.85×10-1 gTOC/kWh. However, the decomposition and efficiency rates are expected to increase by improving the utilization rate of O3 and optimizing plasma conditions.抄録全体を表示PDF形式でダウンロード (542K) -
平良 優介, 上杉 喜彦, 田中 康規, 石島 達夫2015 年 135 巻 3 号 p. 182-188
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーThis paper describes the fundamental characteristics of dielectric barrier discharges (DBD) generated using high-voltage silicon diode for alternating current (SIDAC). Use of the high-voltage SIDACs with a conventional ac power supply could offer the stepped change in the output high-voltage due to high-speed switching of the SIDACs. Such the stepped high-voltage operation can easily establish DBDs with low cost instead of rf power sources and the pulse voltage power sources usually used for DBDs. The DBDs sustained by the SIDAC with the ac power supply were fundamentally studied in terms of the voltage-current characteristics of generated DBDs. Finally, three types of discharge mode were found to be categorized in the DBDs operation.抄録全体を表示PDF形式でダウンロード (1592K)
研究開発レター
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松井 光彦2015 年 135 巻 3 号 p. 189-190
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーTo provide a method for manufacturing of a silicon mono-like crystal without using a seed crystal, a repellent film is tried to use as a mold releasing film. The molten silicon is solidified into a single direction. The orientation of the silicon crystal manufactured by using the repellent film are aligned almost in the same direction. It is found that the repellent mold releasing film is effective for manufacturing of the silicon mono-like crystal.抄録全体を表示PDF形式でダウンロード (316K)
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2015 年 135 巻 3 号 p. ES3_1
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリー＊投稿手引の改正に伴い，2013年10月1日以降に新規に投稿され，その後掲載決定となった論文および資料には，Extended Summaryがありません。抄録全体を表示PDF形式でダウンロード (202K)
部門記事
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2015 年 135 巻 3 号 p. NL3_1
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーPDF形式でダウンロード (293K) -
2015 年 135 巻 3 号 p. NL3_2
発行日: 2015年
公開日: 2015/03/01
ジャーナル フリーPDF形式でダウンロード (135K)
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