2017 IEEE 21st International Conference on Pulsed Power (PPC)最新文献_第5页

Circuit-PIC coupled model of 3D simulation for magnetically insulated transmission line system 磁绝缘输电线路系统三维仿真的电路- pic耦合模型

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/PPC.2017.8291332

Luo Wei, Wan HongGuang, Li Yongdong, Pen Min

引用次数: 0

Comparison of bubbles due to frequency change and electrode direction in high repetitive plasma in water 水中高重复等离子体中频率变化和电极方向引起气泡的比较

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/PPC.2017.8291319

Kazuki Kimura, T. Oikawa, Daiki Sugawara, M. Akiyama, H. Akiyama

{"title":"Comparison of bubbles due to frequency change and electrode direction in high repetitive plasma in water","authors":"Kazuki Kimura, T. Oikawa, Daiki Sugawara, M. Akiyama, H. Akiyama","doi":"10.1109/PPC.2017.8291319","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291319","url":null,"abstract":"Underwater discharges are applied in the industrial field. However, phenomena of underwater discharges have not been completely clarified. The purpose of our study is to clarify characteristics of underwater discharges. In high repetitive underwater discharges, bubbles generated by discharges are gathered to the tip of an electrode. Discharge plasma form may change to a ballshaped discharge by bubbles. Our study focused on bubbles and investigated the movement of bubbles generated by discharges. Experimental setup are as follows: pulse power discharge by MPC method with maximum output 1 J/pulse, the water conductivity of about 150 pS/cm, the electrode made of copper with a diameter of 0.8 mm, the repetition frequency of up to 500 pps (pulses per second), a high speed camera with the frame rate of 57000 fps (frames per second) and image processing software. This paper has four contents: comparison of the movement of bubbles on 250 and 500 pps, comparison of discharge plasma forms on 250 and 500 pps by change of the direction of the electrode, expansion and contraction of bubbles, and electron temperature and electron density of plasma. In the case of the discharge on high frequency, bubbles tend to gather to the tip of electrode. As the frequency rises, the discharge plasma forms tend to be ball shaped bubble. The downward electrode discharge is easier to gather bubbles than the upward electrode discharge. The vibration frequency was higher as the area of the bubble was smaller. Also, the electron temperature was about 8000 K, and the electron density was about 108 orders.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128875855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of high voltage IES pulse charger using IGBT 利用IGBT技术研制高压IES脉冲充电器

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/PPC.2017.8291301

Takehiro Yamaguchi, Taiki Miyazaki, Douyan Wang, T. Namihira

{"title":"Development of high voltage IES pulse charger using IGBT","authors":"Takehiro Yamaguchi, Taiki Miyazaki, Douyan Wang, T. Namihira","doi":"10.1109/PPC.2017.8291301","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291301","url":null,"abstract":"Studies of pulsed power technology have in recent years led to applications in various fields such as medicine, environment, and agriculture. For practical applications, both energy efficiency and system simplicity are important. The nanosecond pulse discharge system developed by our research group generates pulsed power with a rise time of 2 ns and a peak voltage over 60 kV, resulting in low heating loss of discharge and enabling highly efficient gas treatments. The system consists of a DC charger, microsecond pulse generation circuit, nanosecond pulse forming line, transmission line and a load. A problem is the large size and complexity of our system. This study focused on the microsecond pulse generation circuit as a step to solve this problem. Current microsecond pulse generation circuits are based on capacitive energy storage (CES); conversely, use of inductive energy storage (IES) would both reduce and simplify the system. Fortunately, the technology of power devices has developed dramatically in recent years, and semiconductor devices that enable interruption of large currents in the high-speed region have also been developed. This enables development of pulse voltage sources based on induced energy storage instead of capacitive energy storage. Here, we introduce a compact and low-cost microsecond pulse generation circuit based on IES using IGBT as an opening switch. A comparison and evaluation of these circuits with current CES microsecond pulse generation circuits was also carried out.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126048988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

HV cables for remotely located pulsed magnetron applications 远距离脉冲磁控管应用的高压电缆

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/PPC.2017.8291264

J. Hutley, M. Hicks

{"title":"HV cables for remotely located pulsed magnetron applications","authors":"J. Hutley, M. Hicks","doi":"10.1109/PPC.2017.8291264","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291264","url":null,"abstract":"In the majority of applications for Teledyne e2v's direct-switched solid-state modulators, the modulator is connected to the magnetron with a short length of cable. This colocation of modulator and magnetron imposes very little pulse distortion and yields a high-quality, flat current pulse with good RF fidelity. Typically, the modulator output cable is not rated for the full operating voltage of the magnetron; voltage breakdown is instead prevented by mechanically ensuring suitable separation of the cable from earthed surfaces. This approach limits modularity and the topological layout of systems. Some applications demand a more modular approach, where the magnetron is physically separated from the modulator. Applications such as linear accelerator gantries or steerable antennae could benefit from the reduction in mass associated with the remote location of the modulator system, thereby reducing the mechanical demands of their rotating platforms. To achieve this design flexibility, the practicalities and considerations for transmitting high-power electrical pulse energy over a number of meters, via commercially available cables, need to be determined. This paper details the considerations for such an HV cable to be able to operate a pulsed magnetron, remote from the modulator source. It reviews the construction of HV cables from adjacent applications, and outlines the electromechanical performance factors that determine suitability for the aforementioned scenarios. Magnetron and modulator performance limiting factors are also identified and discussed. Finally, a time-domain transient analysis is presented, with supporting evidence from experimental test results.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"493 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121169877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Novel pulsed power system for inductive output tubes 新型电感输出管脉冲电源系统

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/PPC.2017.8291169

Francisco Cabaleiro Magallanes

引用次数: 0

6+ MV laser triggered gas switch used on Z 6+ MV激光触发气体开关用于Z

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/PPC.2017.8291165

P. Wakeland, N. R. Wemple, M. Savage

{"title":"6+ MV laser triggered gas switch used on Z","authors":"P. Wakeland, N. R. Wemple, M. Savage","doi":"10.1109/PPC.2017.8291165","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291165","url":null,"abstract":"The Z pulsed power driver at Sandia National Laboratories is used for a wide range of high energy density physics experiments in areas such as inertial confinement fusion, radiation effects, and dynamic material properties. Experimental demands are pushing for the highest energy attainable with more reliability and precision in timing and pulse compression. A previous version of the laser-triggered gas switch had been made reliable at voltages up to 5.7 MV, allowing 5 nanosecond load accuracy. The desire for higher energy and higher precision dictated a new laser-triggered switch design. In Z, 36 DC-charged Marx generators pulse-charge water-insulated capacitors in 1.5 microseconds. The laser-triggered gas switch commutes the energy stored in the water-insulated capacitor to subsequent pulse compression stages that utilize self-closing water switches. The laser-triggered switch is the last command triggered switch in the chain, and largely determines the temporal accuracy of the total load current. Both switches consist of a laser triggered section and a self-closing cascade section. The previous design required a trigger plate to provide mechanical support for the cascade section. With fixed laser energy, it was impossible to increase the triggered fraction of the switch. Because of the trigger support plate that affects the field distribution after triggering, establishing an operating pressure that provides a reliable balance between low pre-fire rate and low jitter becomes difficult, and more so at higher voltage. The new switch uses a cantilevered design that increases the electric stress in the self-closing section after triggering, even with a slightly-reduced triggered gap. It was required that the new design work within the same operating space and infrastructure as the previous. We will show details of the design and features necessary for reliable operation in the extreme electrical and mechanical environment presented by daily operation on Z.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121774235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Preliminary study on the EM launch of nano-satellites 纳米卫星电磁发射的初步研究

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/PPC.2017.8291310

I. McNab

引用次数: 0

Capabilities of gamma facility to study material properties in the range of warm dense matter and pressure up to 100 GPA 伽马设备的能力，以研究材料性质范围内的温暖致密物质和压力高达100 GPA

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/ppc.2017.8291230

S. Kuznetsov, S. Garanin

引用次数: 0

Plasma characterization in a repetitively pulsed electron beam diode 重复脉冲电子束二极管中的等离子体特性

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/PPC.2017.8291206

M. Myers, D. Hinshelwood, F. Hegeler, M. Wolford

引用次数: 0

All solid-state rectangular pulse generator for corona discharge in water 用于水中电晕放电的全固态矩形脉冲发生器

2017 IEEE 21st International Conference on Pulsed Power (PPC) Pub Date : 2017-06-01 DOI: 10.1109/PPC.2017.8291315

J. Rao, J. Kolb

{"title":"All solid-state rectangular pulse generator for corona discharge in water","authors":"J. Rao, J. Kolb","doi":"10.1109/PPC.2017.8291315","DOIUrl":"https://doi.org/10.1109/PPC.2017.8291315","url":null,"abstract":"Industrial pollutants and in particular pharmaceutical residues have caused large-scale pollution to the potable water in China. Many pharmaceuticals and macromolecular organic matter withstand conventional water treatment technologies. Consequently, advanced oxidation processes (AOP), and especially low-temperature plasmas with their ability to create reactive species including the hydroxyl radical which is currently one of the strongest oxidants in nature directly in water, may offer a promising solution. We developed a plasma reactor with a coaxial geometry to generate large volume corona discharges directly in water. To avoid that the corona discharges develop into arc discharges, high-voltage pulses with the duration of only a few hundreds of nanoseconds are required. Moreover, since the impedance of the waste water in the plasma reactor varies all the time, it is better not to require the impedance matching for the pulse generator. Therefore, an all solid-state nanosecond pulse generator using IGBTs is constructed in Marx topology. FPGA is utilized to generate the nanosecond signals and the driving circuits are precisely designed to trigger 12 IGBTs synchronously in a few nanoseconds. Finally, nanosecond pulses with voltage amplitude up to 10 kV, duration of 1–100 μs and frequency up to 10 kHz are generated. Besides, all these parameters can be adjusted easily and the whole system is very compact and portable.","PeriodicalId":247019,"journal":{"name":"2017 IEEE 21st International Conference on Pulsed Power (PPC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131771022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1