Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009627
Leandro C. Silva, J. O. Rossi, L. R. Raimundi, E. Rangel, E. Schamiloglu
Nonlinear Transmission Lines (NLTLs) have been used for RF generation with great success. Possible applications of NLTLs as an RF generator include aerospace radars, telecommunications, battlefield communication disruption, etc. The RF pulses generated by the NLTLs can be radiated using antennas connected to the output of the lines. Also, there has been a paucity in the literature considering experimental results on the extraction and radiation of the RF signals from the NLTL output. This work reports the results obtained with a low voltage lumped capacitive NLTL in which oscillations of about 230 MHz were produced and radiated using two Double-Ridged Guide (DRG) antennas for signal transmission and reception. The RF signal from the NLTL output was extracted using a high-pass filter decoupling circuit. The performance of the NLTL was evaluated using the analysis in time and frequency domains of the RF pulse signals at the outputs of the line and the DRG receiving antenna. A SPICE line model has been implemented showing a good agreement between the simulation and experimental results.
{"title":"Pulsed RF Signal Irradiation Using a Low Voltage NLTL Coupled to a DRG Antenna","authors":"Leandro C. Silva, J. O. Rossi, L. R. Raimundi, E. Rangel, E. Schamiloglu","doi":"10.1109/PPPS34859.2019.9009627","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009627","url":null,"abstract":"Nonlinear Transmission Lines (NLTLs) have been used for RF generation with great success. Possible applications of NLTLs as an RF generator include aerospace radars, telecommunications, battlefield communication disruption, etc. The RF pulses generated by the NLTLs can be radiated using antennas connected to the output of the lines. Also, there has been a paucity in the literature considering experimental results on the extraction and radiation of the RF signals from the NLTL output. This work reports the results obtained with a low voltage lumped capacitive NLTL in which oscillations of about 230 MHz were produced and radiated using two Double-Ridged Guide (DRG) antennas for signal transmission and reception. The RF signal from the NLTL output was extracted using a high-pass filter decoupling circuit. The performance of the NLTL was evaluated using the analysis in time and frequency domains of the RF pulse signals at the outputs of the line and the DRG receiving antenna. A SPICE line model has been implemented showing a good agreement between the simulation and experimental results.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129168836","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}
Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009914
D. Sanabria, J. Lehr
As opposed to pure water, electrical breakdown in seawater has not been studied broadly. In seawater, the ions are provided via the salt content, leading to a conductivity of about 53mS/cm. In contrast purified water has a theoretical conductivity of 55nS/cm. The hypothesis presented here is that when short pulses are applied to seawater the contribution of the ions to current conduction is weakened due to the low drift velocity of the ions, consequently exhibiting an insulator-like behavior. UNM is testing the properties of seawater breakdown to identify opportunities to exploit different applications of this phenomenon. Tests have been performed with a variety of Na2S2O3 aqueous solutions applying ~6ns pulses in a custom designed chamber. Breakdown events are observed at low concentrations and high voltage, FWHM, rise time, and inter electrode distance are also correlated and different electrode geometries explored. Analysis of the obtained results show that breakdown in seawater is achievable with more energy and will be implemented in future experiments.
{"title":"Breakdown in Seawater and Applications","authors":"D. Sanabria, J. Lehr","doi":"10.1109/PPPS34859.2019.9009914","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009914","url":null,"abstract":"As opposed to pure water, electrical breakdown in seawater has not been studied broadly. In seawater, the ions are provided via the salt content, leading to a conductivity of about 53mS/cm. In contrast purified water has a theoretical conductivity of 55nS/cm. The hypothesis presented here is that when short pulses are applied to seawater the contribution of the ions to current conduction is weakened due to the low drift velocity of the ions, consequently exhibiting an insulator-like behavior. UNM is testing the properties of seawater breakdown to identify opportunities to exploit different applications of this phenomenon. Tests have been performed with a variety of Na2S2O3 aqueous solutions applying ~6ns pulses in a custom designed chamber. Breakdown events are observed at low concentrations and high voltage, FWHM, rise time, and inter electrode distance are also correlated and different electrode geometries explored. Analysis of the obtained results show that breakdown in seawater is achievable with more energy and will be implemented in future experiments.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129462040","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}
Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009986
M. Lapointe, L. Collier, T. Kajiwara, J. Dickens, J. Mankowski, A. Neuber
An innovative gating scheme for wide bandgap semiconductor switches is investigated to fully exploit recent advances of SiC MOSFET properties in hold-off voltage (from single digits to tens of kV) and low on-state resistance (tens of mΩ). Robust gate driving techniques are required to achieve fast risetimes on the order of 10–20 ns. Further, due to the high dI/dt, and subsequent inductive kickback, parasitic inductance may drastically affect the performance of commercially available totem-pole gate drivers. Further, traditionally packaged MOSFETs exhibit additional degradation of switching characteristics due to the introduction of parasitics primarily due to their lead geometry.
{"title":"Improving Fast SiC MOSFET Switching Using an Inductive Gate Drive Approach","authors":"M. Lapointe, L. Collier, T. Kajiwara, J. Dickens, J. Mankowski, A. Neuber","doi":"10.1109/PPPS34859.2019.9009986","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009986","url":null,"abstract":"An innovative gating scheme for wide bandgap semiconductor switches is investigated to fully exploit recent advances of SiC MOSFET properties in hold-off voltage (from single digits to tens of kV) and low on-state resistance (tens of mΩ). Robust gate driving techniques are required to achieve fast risetimes on the order of 10–20 ns. Further, due to the high dI/dt, and subsequent inductive kickback, parasitic inductance may drastically affect the performance of commercially available totem-pole gate drivers. Further, traditionally packaged MOSFETs exhibit additional degradation of switching characteristics due to the introduction of parasitics primarily due to their lead geometry.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117033168","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}
Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009740
M. Hinojosa, A. Ogunniyi, H. O’Brien
This work presents preliminary measurements of recently-fabricated, state-of-the-art SiC Insulated-Gate Bipolar Transistors (IGBTs) and Junction Barrier Schottky (JBS) diodes co-packaged in a high-performance module. The IGBT devices have an active area of 0.3 cm2, a drift region of 160 µm, and are rated for 20 kV and 20 A. The dual JBS diodes have a chip area of 0.65 cm2 and are rated for 10 kV each and 20 A. The IGBTs were co-packaged with JBS diodes in a boost-chopper configuration and utilize Al2O3 substrates for improved thermal performance. The devices-under-test were successfully tested at bus voltages up to 15 kV under resistive and inductive loads.
{"title":"Performance of 18-kV Silicon Carbide High-Voltage Boost-Chopper Modules","authors":"M. Hinojosa, A. Ogunniyi, H. O’Brien","doi":"10.1109/PPPS34859.2019.9009740","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009740","url":null,"abstract":"This work presents preliminary measurements of recently-fabricated, state-of-the-art SiC Insulated-Gate Bipolar Transistors (IGBTs) and Junction Barrier Schottky (JBS) diodes co-packaged in a high-performance module. The IGBT devices have an active area of 0.3 cm2, a drift region of 160 µm, and are rated for 20 kV and 20 A. The dual JBS diodes have a chip area of 0.65 cm2 and are rated for 10 kV each and 20 A. The IGBTs were co-packaged with JBS diodes in a boost-chopper configuration and utilize Al2O3 substrates for improved thermal performance. The devices-under-test were successfully tested at bus voltages up to 15 kV under resistive and inductive loads.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124570550","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}
Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009672
A. Plaçais, Mohamed Belhaj, Julien Hillairet, Jérôme Puech
Characterized by a very fast growth of the electron population in vacuum of Radio-Frequency (RF) devices, the multipactor effect has been widely studied during the past decades. As it limits the transmitted RF power and may degrade RF devices, its understanding is primordial. Multipactor simulation tools give accurate results in the simplest cases, but are less accurate for advanced configurations: complex geometries, dielectric materials, presence of magnetic fields, etc. In such cases, an accurate modelling of the electron emission phenomena becomes essential. We extended a one-dimension electron emission (EE) model to three dimensions. The obtained model is compared to measured electron emission yields. The impact of this new model on the simulated multipactor threshold of parallel plane wave-guide is also investigated.
{"title":"POTOMAC: Towards a Realistic Secondary and Backscattered Emission Model for the Multipactor","authors":"A. Plaçais, Mohamed Belhaj, Julien Hillairet, Jérôme Puech","doi":"10.1109/PPPS34859.2019.9009672","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009672","url":null,"abstract":"Characterized by a very fast growth of the electron population in vacuum of Radio-Frequency (RF) devices, the multipactor effect has been widely studied during the past decades. As it limits the transmitted RF power and may degrade RF devices, its understanding is primordial. Multipactor simulation tools give accurate results in the simplest cases, but are less accurate for advanced configurations: complex geometries, dielectric materials, presence of magnetic fields, etc. In such cases, an accurate modelling of the electron emission phenomena becomes essential. We extended a one-dimension electron emission (EE) model to three dimensions. The obtained model is compared to measured electron emission yields. The impact of this new model on the simulated multipactor threshold of parallel plane wave-guide is also investigated.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122657438","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}
Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009858
Bailey Hall, Eric Bauer, Will Perdikakis, Jin Wang, D. Schweickart, D. Grosjean
Series arcs in dc power systems can occur if energized wires split, or load connections become relaxed. Compared to their parallel counterparts, series dc arcs decrease load current, making detection more challenging. Series dc arc models, along with accompanying detection methods have been studied in the past. However, few studies link load and source impedance to the timing of series dc arcs. Using a broad set of data taken at different RC loads with a fixed loop impedance, the minimum required time for a sustained series dc arc to occur was defined. Analytic models describing the transient behavior of series dc arcs are used to link the load and line impedance to this necessary timing condition. The findings in this paper can guide the design of future dc power systems, ensuring current detection and protection schemes may operate within the minimum time window.
{"title":"Characterization of Sustained Series dc Arc Duration for Advanced Detection Schemes","authors":"Bailey Hall, Eric Bauer, Will Perdikakis, Jin Wang, D. Schweickart, D. Grosjean","doi":"10.1109/PPPS34859.2019.9009858","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009858","url":null,"abstract":"Series arcs in dc power systems can occur if energized wires split, or load connections become relaxed. Compared to their parallel counterparts, series dc arcs decrease load current, making detection more challenging. Series dc arc models, along with accompanying detection methods have been studied in the past. However, few studies link load and source impedance to the timing of series dc arcs. Using a broad set of data taken at different RC loads with a fixed loop impedance, the minimum required time for a sustained series dc arc to occur was defined. Analytic models describing the transient behavior of series dc arcs are used to link the load and line impedance to this necessary timing condition. The findings in this paper can guide the design of future dc power systems, ensuring current detection and protection schemes may operate within the minimum time window.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"412 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115923903","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}
Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009673
Yonggang Wang, Min Jiang, Jinxing Xie, Yifan Huang, P. Chu
Nanosecond high voltage pulse generators are widely used in dielectric barrier discharge, plasma jet, corona discharge in water, et al. In this paper, a novel bipolar pulse adder with output parameters adjustable is proposed. Several full bridge units are connected in series, and the storage capacitor in each unit is charged individually by a high-frequency resonant power supply. The charging process is analyzed. The influence of balance windings on voltage difference between storage capacitors is also studied. The results show that voltage difference changes with switching frequency. Without the balance windings, voltage unbalance is small at the switching frequency from 20 to 30 kHz. Optic fibers, together with gate drivers, are used to drive the Insulated-Gate Bipolar Transistors (IGBTs). Each switch can be turned on or off independently to change the rise/falling time. Finally, a 6-stage prototype has been developed in laboratory, which can generate bipolar pulses with amplitude, repetition rate, pulse width, and rise/falling time adjustable independently.
{"title":"All-solid-state Bipolar High Voltage Nanosecond Pulse Adder with Output Parameters Adjustable","authors":"Yonggang Wang, Min Jiang, Jinxing Xie, Yifan Huang, P. Chu","doi":"10.1109/PPPS34859.2019.9009673","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009673","url":null,"abstract":"Nanosecond high voltage pulse generators are widely used in dielectric barrier discharge, plasma jet, corona discharge in water, et al. In this paper, a novel bipolar pulse adder with output parameters adjustable is proposed. Several full bridge units are connected in series, and the storage capacitor in each unit is charged individually by a high-frequency resonant power supply. The charging process is analyzed. The influence of balance windings on voltage difference between storage capacitors is also studied. The results show that voltage difference changes with switching frequency. Without the balance windings, voltage unbalance is small at the switching frequency from 20 to 30 kHz. Optic fibers, together with gate drivers, are used to drive the Insulated-Gate Bipolar Transistors (IGBTs). Each switch can be turned on or off independently to change the rise/falling time. Finally, a 6-stage prototype has been developed in laboratory, which can generate bipolar pulses with amplitude, repetition rate, pulse width, and rise/falling time adjustable independently.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"279 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132020162","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}
Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009657
I. Lavrinovich, S. Vagaytsev, A. Erfort, D. Rybka, D. Molchanov, A. Artemov, A. Zhigalin, A. Lensky
The paper proposes a compact LTD generator design based on an HCEIcsa 160-0.1 capacitor-switch assembly (CSA) with an output current of ~1 MA and rise time of 100 ns. The generator design is presented in single- and two-cavity versions with respective numerical data on the operation of LTD cavities and their output parameters.
{"title":"Concept Designs of a Compact LTD Generator with a Pulse Rise Time of 100 ns","authors":"I. Lavrinovich, S. Vagaytsev, A. Erfort, D. Rybka, D. Molchanov, A. Artemov, A. Zhigalin, A. Lensky","doi":"10.1109/PPPS34859.2019.9009657","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009657","url":null,"abstract":"The paper proposes a compact LTD generator design based on an HCEIcsa 160-0.1 capacitor-switch assembly (CSA) with an output current of ~1 MA and rise time of 100 ns. The generator design is presented in single- and two-cavity versions with respective numerical data on the operation of LTD cavities and their output parameters.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114514386","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}
Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009669
T. Ueji, Y. Suzuki, T. Namihira, D. Wang
Atmospheric pressure low temperature plasma has been applied in various research fields. In biological applications using atmospheric pressure plasma, various chemically active species can be generated in gas phase by the plasma. The chemically active species are generated in the liquid phase such as blood, body fluid, and culture media, they are thought that it contributes to the growth and sterilization of cells and fungi. In this study, in order to investigate the mechanism of inactivation of cancer cells induced by atmospheric pressure plasma, we used electron beam which is useful to avoid complicated plasma reaction and study the radical reaction with cells and mediums. Difference between influence in H2O2 production and the death feature of cell were studied. Three kinds of seeding gases (nitrogen, oxygen and helium) were used. By the results of this study, in the HeLa cells death caused by EB plasma, it is suggested that the products other than H2O2 can be the cause of cell inactivation. Moreover, it was also confirmed that the feature of cell death changes from apoptosis to necrosis by the accumulation of the stress in plasma irradiation.
{"title":"Inactivation process observation of HeLa cells induced by EB irradiated atmospheric-pressure plasma","authors":"T. Ueji, Y. Suzuki, T. Namihira, D. Wang","doi":"10.1109/PPPS34859.2019.9009669","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009669","url":null,"abstract":"Atmospheric pressure low temperature plasma has been applied in various research fields. In biological applications using atmospheric pressure plasma, various chemically active species can be generated in gas phase by the plasma. The chemically active species are generated in the liquid phase such as blood, body fluid, and culture media, they are thought that it contributes to the growth and sterilization of cells and fungi. In this study, in order to investigate the mechanism of inactivation of cancer cells induced by atmospheric pressure plasma, we used electron beam which is useful to avoid complicated plasma reaction and study the radical reaction with cells and mediums. Difference between influence in H2O2 production and the death feature of cell were studied. Three kinds of seeding gases (nitrogen, oxygen and helium) were used. By the results of this study, in the HeLa cells death caused by EB plasma, it is suggested that the products other than H2O2 can be the cause of cell inactivation. Moreover, it was also confirmed that the feature of cell death changes from apoptosis to necrosis by the accumulation of the stress in plasma irradiation.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114536249","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}
Pub Date : 2019-06-01DOI: 10.1109/PPPS34859.2019.9009646
C. Rousculp, P. M. Donovan, J. Dunwoody, F. Fierro, J. C. Lamar, F. Mariam, L. Neukirch, R. Randolph, W. Reass, A. Saunders, S. Sjue, M. Freeman, Z. Tang, P. Turchi, T. Voorhees, D. Fredenburg, J. Griego, D. Oró, A. Patten, J. Bradley, R. Reinovsky
The PHELIX portable pulsed power driver has recently completed a set of experiments examining the response of granular material to convergent shock loading. Here a nearly 4 MA peak current is delivered to a Z-pinch load with a quarter wave cycle time of ~3 us. This produces B ~ 0.30 MG field at the surface of a ~3 cm diameter, 1 mm thick, 3 cm tall Al liner. The liner is accelerated to ~800 km/s before shock impacting a target cylinder filled with fine-grain CeO2 powder. Design and analysis simulations are performed with 2D MHD Lagrangian/ALE code to predict the liner performance and material response. Computational results are compared to the PHELIX Faraday rotation measurements for load current as well as proton radiographic imaging of the evolution of the density profile in the CeO2.
{"title":"MHD Modeling of Shock Physics Experiments with the Phelix Portable High Magnetic Field Drive","authors":"C. Rousculp, P. M. Donovan, J. Dunwoody, F. Fierro, J. C. Lamar, F. Mariam, L. Neukirch, R. Randolph, W. Reass, A. Saunders, S. Sjue, M. Freeman, Z. Tang, P. Turchi, T. Voorhees, D. Fredenburg, J. Griego, D. Oró, A. Patten, J. Bradley, R. Reinovsky","doi":"10.1109/PPPS34859.2019.9009646","DOIUrl":"https://doi.org/10.1109/PPPS34859.2019.9009646","url":null,"abstract":"The PHELIX portable pulsed power driver has recently completed a set of experiments examining the response of granular material to convergent shock loading. Here a nearly 4 MA peak current is delivered to a Z-pinch load with a quarter wave cycle time of ~3 us. This produces B ~ 0.30 MG field at the surface of a ~3 cm diameter, 1 mm thick, 3 cm tall Al liner. The liner is accelerated to ~800 km/s before shock impacting a target cylinder filled with fine-grain CeO2 powder. Design and analysis simulations are performed with 2D MHD Lagrangian/ALE code to predict the liner performance and material response. Computational results are compared to the PHELIX Faraday rotation measurements for load current as well as proton radiographic imaging of the evolution of the density profile in the CeO2.","PeriodicalId":103240,"journal":{"name":"2019 IEEE Pulsed Power & Plasma Science (PPPS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121842866","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}
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