Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.最新文献_第7页

Timing and synchronization of solid state pulsed power modules (SSPPM) for excimer laser applications 准分子激光用固态脉冲功率模块(SSPPM)的定时与同步

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189531

R. Ness, P. Melcher, R. Saethre

{"title":"Timing and synchronization of solid state pulsed power modules (SSPPM) for excimer laser applications","authors":"R. Ness, P. Melcher, R. Saethre","doi":"10.1109/MODSYM.2002.1189531","DOIUrl":"https://doi.org/10.1109/MODSYM.2002.1189531","url":null,"abstract":"In certain applications for excimer lasers, it is critical to maintain the timing of a solid state pulsed power module (SSPPM) such that the pulsed output of the laser can be synchronized to another external event. In some cases, this synchronization must be held to times in the order of 10 ns or less. Since the operating voltage range of these magnetic modulators must vary (by up to a factor of two) in order to adjust the laser output energy, the throughput delay can also vary significantly. This timing must also be maintained over other possible laser operating conditions and scenarios, including various repetition rates, duty cycles, etc. External factors, such as cooling water temperature and flow rate, air temperature, etc. can also impact the system timing. Data are presented detailing the contribution of each potential item in the timing sequence of these modulators as they impact the overall system timing jitter and drift. Design details are also discussed as to how these issues are mitigated and minimized so as to reduce their effect and meet the overall system timing requirements.","PeriodicalId":339166,"journal":{"name":"Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128278428","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: 3

High-power microwave generation by virtual cathode oscillator 虚阴极振荡器产生高功率微波

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189458

Weihua Jiang, M. Sato, K. Yatsui

引用次数: 0

Design of a new driver for fast and ultra-powerful capillary discharge 一种新型快速、超强毛细管放电驱动器的设计

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189492

J. Schmidt, V. Bohacek, K. Kolacek, M. Ripa, P. Šunka, O. Frolov

引用次数: 2

Thin film diamond-like carbon dielectrics 薄膜类金刚石碳电介质

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189471

R. Wu, H. Kosai, M. Freeman, G. Schwarze, S. F. Carr, J. Weimer

引用次数: 2

High-voltage, high-power, pulse-step modulators for the accurate supply of gyrotron and other heating devices 高压、大功率、脉冲阶跃调制器，用于精确供应回旋管和其他加热装置

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189432

W. Forster, J. Alex

{"title":"High-voltage, high-power, pulse-step modulators for the accurate supply of gyrotron and other heating devices","authors":"W. Forster, J. Alex","doi":"10.1109/MODSYM.2002.1189432","DOIUrl":"https://doi.org/10.1109/MODSYM.2002.1189432","url":null,"abstract":"At the Max-Planck-Institut fur Plasmaphysik in Greifswald, Germany, there are planed several plasma heating systems with high output power. There is on the one hand an ion cyclotron resonance heating (ICRH) with a pulsed output power of 2 MW per RF amplifier, a neutral beam injection (NBI) with a pulsed output power of up to 3 MW per accelerator and an electron cyclotron resonance heating system (ECRH) with totally 10 MW output cw with 10 tubes. For the supply of the different systems universal high voltage power sources with totally 26 MW electrical power in cw operation and 52 MW in pulsed operation are under construction. The output voltage can be adjusted up to 130 kV. The system has very low amount of stored energy. For this reason a commonly used crowbar system Is not necessary. The power supplies have the capability of modulation up to 500 Hz square wave with a modulation degree of one and several kHz with lower degrees. To meet all requirements for all the heating systems, the supply can be configured concerning polarity, maximum voltage and current, modulation parameters, series operation, pulse length supervision etc. The supply comes in four units where the first unit with 6.5 MW cw is in operation since end of 2001.","PeriodicalId":339166,"journal":{"name":"Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131944147","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: 18

Pulsed ion beam evaporation at low temperature for the preparation of thin films 低温脉冲离子束蒸发制备薄膜

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189535

K. Yatsui, H. Suematsu, S. Yang, R. Iwashita, T. Nagahama, N. Uchitomi, W. Jiang, T. Arikado

引用次数: 0

The generation of high electric field strength RF energy using Marx generators 利用马克思发生器产生高电场强度射频能量

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189460

J. Mayes, W. Carey

引用次数: 9

Triggered spark gap switches and their erosion characteristics 触发式火花隙开关及其腐蚀特性

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189521

Y. Isaenkov, N. Bublik, P. Makeev

引用次数: 5

High voltage modulator family for diagnostic neutral beam injectors 用于诊断中性束注入器的高压调制器系列

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189470

A. Medvedko, G.F. Abdrashitov, A. Bulatov, Yu. A. Evtushenko, V. Kolmogorov, G. Krainov

{"title":"High voltage modulator family for diagnostic neutral beam injectors","authors":"A. Medvedko, G.F. Abdrashitov, A. Bulatov, Yu. A. Evtushenko, V. Kolmogorov, G. Krainov","doi":"10.1109/MODSYM.2002.1189470","DOIUrl":"https://doi.org/10.1109/MODSYM.2002.1189470","url":null,"abstract":"For the purpose of a beam emission spectroscopy diagnostic in plasma fusion devices the Diagnostic Neutral Beam Injectors (DNBI) are used. The typical beam parameters of these DNBIs are as follows: neutral beam energy ranges from 20 kV up to 55 kV, equivalent neutral beam current is 1-3 A, beam on time varies from 50 msec up to several seconds. The pulse repetition rate is typically about one pulse per 5-20 minutes. For the above mentioned parameters, one can easily calculate that the energy carried out by this beam has a scale of 20 to 200 kJ. The high voltage modulator (HVM) family was developed in the Budker Institute of Nuclear Physics, Novosibirsk, to supply the DNBIs dedicated for this task. One type of them is intended to provide 2 sec. shots with an HVM output current up to 3 A, another one for 50 msec. shots with a current up to 10 A. Two modes of DNBI operation are used: a quasi-continuous beam and 100% amplitude modulated beam with programmable durations of time intervals of the ON and OFF states. In addition, these HVMs have relatively small energy stored by its output reactive elements and are equipped with a fast interlock system to avoid critical damages of the DNBI grids during transient processes and when an electrical breakdown between electrodes occurs. The paper describes the circuitry, design, interlocks and solutions of HVM buffering relative to the mains. In the basic design, 10 kHz IGBT inverters with PWM and matching transformers are used to power the HVMs. One of the HVMs is installed at the TCV Tokamak (EPFL, Lausanne), another one is installed at the Alcator C-mod Tokamak, (MIT, Boston).","PeriodicalId":339166,"journal":{"name":"Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop.","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114345098","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

Losses in magnetic switches 磁开关损耗

Conference Record of the Twenty-Fifth International Power Modulator Symposium, 2002 and 2002 High-Voltage Workshop. Pub Date : 2002-06-30 DOI: 10.1109/MODSYM.2002.1189454

C. Strowitzki, A. Gortler, M. Baumann

引用次数: 11