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Multi-Frequency Harmonic Magnetically Insulated Line Oscillator 多频谐波磁绝缘线路振荡器
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/icops45751.2022.9813019
N. Jordan, R. Revolinsky, D. Packard, C. Swenson, S. Langellotti, L. Welch, E. Guerin, Y. Lau, R. Gilgenbach
{"title":"Multi-Frequency Harmonic Magnetically Insulated Line Oscillator","authors":"N. Jordan, R. Revolinsky, D. Packard, C. Swenson, S. Langellotti, L. Welch, E. Guerin, Y. Lau, R. Gilgenbach","doi":"10.1109/icops45751.2022.9813019","DOIUrl":"https://doi.org/10.1109/icops45751.2022.9813019","url":null,"abstract":"Magnetically insulated line oscillators (MILOs) are crossed-field devices capable of generating intense bursts of high power microwaves. A typical MILO operates with a low (5-10 Ohm) impedance, and uses a large drive current (10s of kA) to generate a self-insulating magnetic field. Through analytic theory [1] , simulation, and experimental work [2] , researchers at the University of Michigan have developed and tested higher-impedance 1 GHz and 2 GHz MILOs.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122312659","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
Portable X-Pinch Driver Development for Dense Plasma Measurements 用于致密等离子体测量的便携式X-Pinch驱动器的开发
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813102
S. Bland, J. Strucka, Y. Yao, S. Parker, J. Yan, N. Schwartz, S. Bott-Suzuki
{"title":"Portable X-Pinch Driver Development for Dense Plasma Measurements","authors":"S. Bland, J. Strucka, Y. Yao, S. Parker, J. Yan, N. Schwartz, S. Bott-Suzuki","doi":"10.1109/ICOPS45751.2022.9813102","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813102","url":null,"abstract":"We report on new, portable X-pinch systems presently under development at Imperial College for probing dense plasmas. Presently 3 drivers have been built, each weighing ~50kg, and capable of driving currents >100kA. With a simple X-pinch load ~100mJ of radiation are emitted in ~1ns duration from a spot size of a few microns. The emission spectra depends on wire material, typically with strong emission in the k-lines, along with a broadband continuum stretching to many 10s of KeV. Radiography, X-ray absorption spectrometry and X-ray diffraction diagnostic tests are discussed, along with the first results utilizing X-ray polycapillary lenses with an X-pinches source to increase flux on target and enable large standoff distances.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125224772","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
Observation of Self-Generated Plasma Rotation and its Effects in A Z-Pinch With Preembedded Axial Magnetic Field 预嵌入轴向磁场的z箍缩中自生等离子体旋转及其影响的观察
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813228
M. Cvejić, D. Mikitchuk, P. Sharma, E. Kroupp, T. Queller, R. Doron, Y. Maron, A. Velikovich, A. Fruchtman, I. Ochs, E. Kolmes, N. Fisch
{"title":"Observation of Self-Generated Plasma Rotation and its Effects in A Z-Pinch With Preembedded Axial Magnetic Field","authors":"M. Cvejić, D. Mikitchuk, P. Sharma, E. Kroupp, T. Queller, R. Doron, Y. Maron, A. Velikovich, A. Fruchtman, I. Ochs, E. Kolmes, N. Fisch","doi":"10.1109/ICOPS45751.2022.9813228","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813228","url":null,"abstract":"Z-pinches with preembedded magnetic field $left({{B_{{z^0}}}}right)$ undergo radial implosion due to the J × B force while compressing the plasma and the embedded magnetic flux. In this work, we demonstrate for the first time a self-generated plasma rotation for a cylindrical Z-pinch implosion with ${B_{{z^0}}}$ [1] . The rotation direction is found to depend on the direction of ${B_{{z^0}}}$ . The observed rotation velocity is found to be comparable to the implosion velocity. The rotation is found to affect the implosion dynamics by exerting a centrifugal force and by mitigating plasma instabilities. The evolution of the rotation is seen to be consistent with magnetic flux surface isorotation, a novel observation in a Z pinch, which is a prototypical time-dependent system.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131105746","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
Modeling of a Nanosecond Pulsed Atmospheric Pressure Plasma on Water 纳秒脉冲大气压等离子体在水中的模拟
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/icops45751.2022.9813031
T. Petrova, M. Johnson, D. Boris, S. Walton
{"title":"Modeling of a Nanosecond Pulsed Atmospheric Pressure Plasma on Water","authors":"T. Petrova, M. Johnson, D. Boris, S. Walton","doi":"10.1109/icops45751.2022.9813031","DOIUrl":"https://doi.org/10.1109/icops45751.2022.9813031","url":null,"abstract":"Recently, there is a rapidly growing body of work studying plasma-based water treatment for applications within the medical, environmental, and agriculture sectors. Atmospheric pressure plasmas produced by high voltage pulses with 10’s of nanoseconds in duration are well suited for treatment of liquids 1 , 2 , 3 and surfaces. Modeling of nanosecond pulsed plasma is challenging due to plasma complexity, as well as different reaction time-scales; from nanoseconds to seconds. Moreover, the plasma is affected by sheath formation 4 and reactions of aqueous species with gas phase plasma species at the plasma/liquid interface 5 . We present a time-dependent global model to study the decay of various plasma species in helium carrier gas and obtain the trends with changing the pulse frequency and pulse duration. The model in conjunction of voltage measurements and OES diagnostics provide a useful tool for such analyses.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116517523","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
Sensitivity of Multipactor on Variations in SEY using a Continuum Vlasov-Poisson Model* 使用连续Vlasov-Poisson模型的多因子对SEY变化的敏感性*
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813001
L. Silvestre, R. Joshi, J. Stephens, J. Dickens, J. Mankowksi, A. Neuber
{"title":"Sensitivity of Multipactor on Variations in SEY using a Continuum Vlasov-Poisson Model*","authors":"L. Silvestre, R. Joshi, J. Stephens, J. Dickens, J. Mankowksi, A. Neuber","doi":"10.1109/ICOPS45751.2022.9813001","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813001","url":null,"abstract":"The impact of secondary electron yield (SEY) variations on multipactor in a parallel plate geometry is probed. In this contribution, electron swarm dynamics are simulated via the continuum approach across a variety of SEY curves. The objective is to determine which changes and shifts in the SEY curve are most sensitive to the final multipactor outcome. For instance, will a variation in the maximum SEY yield while retaining the first crossover energy produce significant changes in the MP susceptibility? To parameterize, the probed SEY curves are approximated by suitable square, triangular, or trapezoidal shapes and fed into the Vlasov-Poisson-based MP model to evaluate the impact of chosen energy-dependent deviations on multipactor. A shaped approximation of the SEY curve has already shown to produce signifigant changes in multipacotr susceptibility especially in the 1 st order regime. Variations in the 1 st and 2 nd crossover points of the SEY curve are also compared within the same susceptibility graphs. The results of this Vlasov-Poisson method are benchmarked against commercial software, particularly Spark3D. The results obtained and implications of SEY deviations on multipactor will be presented and discussed.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128017368","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
A 0.2THz Convergence Angular Radial Extended Interaction Oscillator 一种0.2THz收敛角径向扩展相互作用振荡器
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813179
Y. Li, Y. Dong, S. Wang, Y. Gong
{"title":"A 0.2THz Convergence Angular Radial Extended Interaction Oscillator","authors":"Y. Li, Y. Dong, S. Wang, Y. Gong","doi":"10.1109/ICOPS45751.2022.9813179","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813179","url":null,"abstract":"A 0.22THz convergence-angular radial extended interaction oscillator is proposed in this paper. The convergence-angular radial cavity has higher characteristic impedance and lower loss area than sheet beam cavity. And the current density of the convergence-angular radial beam will increase along the propagation. The cavity consists nine gaps and the operating mode is 2π mode. The Particle-in-cell (PIC) simulation results show that the peak output power of the oscillator can reach 870 W at 222 GHz, under the conditions of lossy metal (Copper, conductivity of 5.8×107 S/m) and angular radial beam (21.5 kV, 0.6 A). As the working voltage changes from 19.5kv to 21.5kv, the output power changes from 121w to 870w, and the frequency changes from 222.28GHz to 222.53GHz.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133973592","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
Effects of Repetition Frequency and Rising Edge Time on Uniformity of Air Dielectric Barrier Discharge 重复频率和上升沿时间对空气介质阻挡放电均匀性的影响
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813351
J. Chen, F. Liu, Y. Zhao, Z. Fang
{"title":"Effects of Repetition Frequency and Rising Edge Time on Uniformity of Air Dielectric Barrier Discharge","authors":"J. Chen, F. Liu, Y. Zhao, Z. Fang","doi":"10.1109/ICOPS45751.2022.9813351","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813351","url":null,"abstract":"Nanosecond pulse excited dielectric barrier discharge (DBD) with fast rising edge and high breakdown voltage can enhance the discharge uniformity and reactivity. In this paper, the discharge image and the voltage-current waveforms of the nanosecond pulsed air DBD with grounded ITO electrode are measured to reveal the effects of the pulse repetition frequency (PRF) and rising edge time on the discharge uniformity. The discharge uniformity is quantitatively analyzed by the observed discharge images and the gray analysis method. The results show that when the PRF is less than 5kHz, the discharge is uniform. With the frequency increases, the residual charged particles will lead to the deterioration of the electrical field and decrease the uniformity. The rapid voltage slew rate can increase the reduced electric field strength in space, which promotes the electron avalanche merging and increase the discharge uniformity. It is also found that the increase of PRF would lead to the increase of the peak values of the gap voltage and the discharge current first (from 500Hz to 3kHz) and then decrease. The increase of pulse rising time leads the decrease of the peak values of the gap voltage and the discharge current. The results contribute to the realization of uniform and reactive plasmas.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132006740","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
Study of a Current Loss at A Z-Pinch Stagnation Due to Fast Current Redistribution 快速电流再分配引起的z箍缩滞胀的电流损失研究
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813073
C. Stollberg, E. Kroupp, D. Mikitchuk, P. Sharma, V. Bernshtam, M. Cvejić, R. Doron, E. Stambulchik, Y. Maron, A. Fruchtman, I. Ochs, N. Fisch, U. Shumlak
{"title":"Study of a Current Loss at A Z-Pinch Stagnation Due to Fast Current Redistribution","authors":"C. Stollberg, E. Kroupp, D. Mikitchuk, P. Sharma, V. Bernshtam, M. Cvejić, R. Doron, E. Stambulchik, Y. Maron, A. Fruchtman, I. Ochs, N. Fisch, U. Shumlak","doi":"10.1109/ICOPS45751.2022.9813073","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813073","url":null,"abstract":"We report on the observation of a fast current switching from a Z-pinch stagnating plasma (SP) to a low density plasma (LDP) that resides at larger radii. A small-scale Z-pinch experiment, optimized for a symmetric and reproducible compression, is investigated by polarization sensitive spectroscopy (magnetic field measured by using the separation of σ+ and σ- components) with particularly high spatial resolution. Utilizing a pronounced charge state distribution [1] , we measure the radial distribution of the magnetic field and the plasma properties throughout the entire implosion and stagnation, and down to the small radius of the stagnating plasma.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134230513","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 a Fully Kinetic Particle Simulation Code For Coupled Plasma-Dust Transport 等离子体-尘埃耦合输运全动力学粒子模拟程序的开发
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813088
J. Zhao, D. Han
{"title":"Development of a Fully Kinetic Particle Simulation Code For Coupled Plasma-Dust Transport","authors":"J. Zhao, D. Han","doi":"10.1109/ICOPS45751.2022.9813088","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813088","url":null,"abstract":"We present our ongoing effort of developing a fully kinetic particle simulation code for coupled plasma-dust transport in order to study localized plasma-dust environment near the lunar surface. The electrostatic field caused by charged species including plasma and charged dust grains will be resolved by a finite-difference (FD) particle-in-cell (PIC) code. Trajectories of lofted charged dust grains will be traced coupled with plamsa species including solar wind electrons and ions, and photoelectrons. The new code will be employed to study localized plasma and dust environment. Results will be compared against decoupled methods.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114751351","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
Short Pulse Laser Driven Shocks In Aluminum 铝中的短脉冲激光驱动冲击
2022 IEEE International Conference on Plasma Science (ICOPS) Pub Date : 2022-05-22 DOI: 10.1109/ICOPS45751.2022.9813018
S. E. Parsons, M. Armstrong, R. Turner, C. M. Childs, P. Grivickas, H. Radousky, J. Garay, F. Beg
{"title":"Short Pulse Laser Driven Shocks In Aluminum","authors":"S. E. Parsons, M. Armstrong, R. Turner, C. M. Childs, P. Grivickas, H. Radousky, J. Garay, F. Beg","doi":"10.1109/ICOPS45751.2022.9813018","DOIUrl":"https://doi.org/10.1109/ICOPS45751.2022.9813018","url":null,"abstract":"To better understand laser induced shock wave experiments, a joint theoretical and experimental campaign is being conducted focusing specifically on short pulse experiments in aluminum. The goal of this study is to increase laser energy coupling in shock wave experiments by probing the reaction of aluminum under laser induced compression. The samples consist of a tamper -- either cover slip glass, sapphire, or lithium fluoride -- and the thickness of the aluminum layer is also varied. For each sample geometry, the hot electron penetration depth is determined, improving our understanding of the amount of aluminum that is turned into plasma from the incident laser energy. The shock wave induced pressure is further studied as a function of sample geometry and intensity.","PeriodicalId":175964,"journal":{"name":"2022 IEEE International Conference on Plasma Science (ICOPS)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114858643","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
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