Twenty-First International Power Modulator Symposium, Conference最新文献

{"title":"A Summary Of Developments In Lightweight Prime Power For Tactically Mobile Pulsed Power Applications","authors":"J. Ferrick, T. Childers, H. S. Coombe","doi":"10.1109/MODSYM.1994.597066","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597066","url":null,"abstract":"Ft. Belvoir researchers have long been involved with the development of advanced prime power concepts, components and systems for tactical pulsed power applications. This involvement has led to significant insights as well as significant technological advances. We will discuss concepts and provide estimates of system sizes and weights for clearly achievable or procurable hardware. In addition, we will present and discuss previously unpublished results of mechanical and noload power loss tests on the BelvoiriBendix 3 M W alternator, one of the highest power density machines built to date for pulsed power applications.","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124818794","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}

{"title":"Experimental Limits Of EEV CX 1812 Thyratron","authors":"L. Kingsley, H. Singh, T. Podlesak, J. Agee, S. Behr, J. Creedon","doi":"10.1109/MODSYM.1994.597096","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597096","url":null,"abstract":"We will discuss our on-going investigation of the operating limits of the English Electric Valve CX 1812 thyratron. The CX 18 12 is a four-gap, hollow-anode thyratron which is rated for a peak anode voltage of 100 kilovolts and a peak anode current of 100 kiloamperes. It is the objective of our program to achieve these 100 kV, 100 kA peak values in a 1-psec pulse with 100 nanosecond rise time. The target pulse repetition frequency is 1 kilohertz. This level of operation would be the highest power operation of a thyratron ever achieved. We will present our approach to achieving this goal and discuss our progress to date. We have completed preliminary aging of the CX 1812 at low-power and lower voltage. We have operated the thyratron at 84 kV and 20 kA at 20 Hz in a resonant RLC circuit, and have run the thyratron for 20 minutes at 75 kV. We have successfully tested a pulse-charging circuit necessary to attain highrep-rate operation. A low-impedance 100-kV PFN is required to achieve the lOO-kV, 100-kA goal and such a network was constructed. This was made more difficult by the pulsewidth and rise time requirement. The status of this project will be reviewed and results to-date will be presented giving an indication of the ultimate limits of this unique thyratron. BACKGROUND In 1993, the U.S. Army Pulse Power Center (PPC) was tasked to investigate the feasibility of producing a pulse power system with the specifications given below. Pulser Design Goals","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125057337","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}

{"title":"High-voltage Recessed-gate GaAs Field Effect Transistors","authors":"P. Hadizad, M. Gundersen, F. Ren","doi":"10.1109/MODSYM.1994.597047","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597047","url":null,"abstract":"","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127253818","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}

{"title":"HEB/collider Freewheel Diode Abort Kicker Power Supplies","authors":"K. Rust, C. Wilson","doi":"10.1109/MODSYM.1994.597082","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597082","url":null,"abstract":"","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126198733","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}

{"title":"The LEB To MEB Transfer Kicker System Prototype","authors":"C. Pappas, M. Wilson, D. Anderson","doi":"10.1109/MODSYM.1994.597063","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597063","url":null,"abstract":"The design requirements for the Low Energy Booster (LEB) extraction kicker system at the Superconducting Super Collider Laboratory (SSCL) were to deflect a 12 GeV/c beam through an angle of 1.5 mrad. The circumference of the LEB was 540 M. This resulted in a 0.06 T-m integrated field, of 1.8 {mu}s width with a 1% to 99% rise time of less than 80 ns and allowable pulse ripple of less than {plus_minus}1%. The repetition frequency was 10 Hz and the allowable timing jitter was 2 ns. The field was required to be uniform over a 2{times}4 cm area to {plus_minus}2.5%. The requirements for the Medium Energy Booster (MEB) injection kicker were similar except that a 99% to 1% pulse fall time of less than 2 {mu}s was needed. Prototypes of the pulsed power system and magnet to meet these requirements were built and tested at the SSCL. This paper describes the results of that testing.","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126452763","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}

{"title":"Analysis And Performance Of A 12-pulse High Power Regulator","authors":"J. Daeges, A. Silva","doi":"10.1109/MODSYM.1994.597067","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597067","url":null,"abstract":"Under work being performed to upgrade the 20 Kilowatt CW uplink transmitters of the NASA Deep Space Network (DSN), the high voltage regulator has been revisited in order to optimize its performance (long-term stability and regulation), and enhance field reliability.","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125701885","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}

{"title":"Investigation Of Spark Gap Electrode Failure","authors":"M. Wofford, M. Baker, M. Kristiansen","doi":"10.1109/MODSYM.1994.597103","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597103","url":null,"abstract":"Many facets of spark gap electrode erosion have been studied. In this case, abrupt electrode failure is being investigated. In certain high power spark gaps, a slight change in the operation of the switch has catastrophic results. The electrodes have noticeable pieces of material blown off. It has been suggested that the damage is a result of the material limitation related to the dddt that the spark gap handles [l]. A test circuit has been created to investigate this phenomenon. A Marx bank provides a pulse with a maximum of 120 kV and 12 kA, with a relatively fast rise time. First, any damage to the electrodes will be correlated with the voltage, current, and dddt of the system. Next, a passive magnetic delay technique will be applied to the current pulse to reduce or eliminate the electrode damage. Magnetic delay techniques have been used successfully in a number of situations with high power switches to reduce erosion or to allow a conduction channel to establish before the !Xl circuit current flows [2,3]. In this case, it will be used to reduce the damage to the switch at high dddt. The paper will provide test circuit simulation and operation, along with diagnostic results (with and without magnetic delay) Further in-depth diagnostic evidence will be provided if available. INTRODUCTION Once erected, the Marx bank fires into a load of 8 R in series with the test switch. The test switch gap spacing is set so that the output gap self breaks. The load resistor is actually six water resistors in parallel arranged in a circular manner. Copper sulfate solution is used, with a concentration of 200 grams per liter of deionized water. Water resistors were used for the load as an inexpensive alternative to low inductance, high voltage resistors. Peaking capacitors, (approximately 4 nF), were placed in parallel with the load to provide a boost to the rise time of the output current. The equivalent circuit can be seen in Figure 1. To study the graphite failure mechanism, a system with a high di/dt must be employed. In this case, the target dddt is 350 Nns. The system is designed for a medium current, with a moderately fast rise time, for the following two reasons: (1) to correlate the failure to high dddt and not high current (2) limited availability of very fast diagnostic equipment At maximum charging voltage, the system will deliver a 12 kA pulse with a 30 ns rise time. Current rate of rise is proportional to voltage and inversely proportional to inductance. A Marx bank is used to provide a high enough voltage to the load to overcome the inductance of the system. It also allows a range of output voltage to the load. Although the system geometry was designed for minimal inductance, peaking capacitors were included to insure a fast initial current. The first goal is to establish consistent failure of the graphite electrodes. After that, steps are taken to reduce the liielihood and amount of damage. One simple parameter to change is the size and geometry","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126654768","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}

{"title":"Some Lessons From Two Generations Of Pulsed Power Electronic Systems","authors":"N. Nicholls","doi":"10.1109/MODSYM.1994.597026","DOIUrl":"https://doi.org/10.1109/MODSYM.1994.597026","url":null,"abstract":"","PeriodicalId":330796,"journal":{"name":"Twenty-First International Power Modulator Symposium, Conference","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126067074","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}