首页 > 最新文献

Journal of electric propulsion最新文献

英文 中文
Hall effect thruster impedance characterization in ground-based vacuum test facilities. 地面真空试验装置中的霍尔效应推力器阻抗特性。
Pub Date : 2024-01-01 Epub Date: 2024-12-02 DOI: 10.1007/s44205-024-00088-9
David R Jovel, Janice D Cabrera, Mitchell L R Walker

Hall effect thrusters (HETs) are typically regarded as DC electric propulsion devices as they are operated with isolated DC power supplies. However, it is well known that the HET's discharge current possesses oscillations of varying magnitudes and frequencies and is thus a function of time with AC characteristics. The observed oscillations are caused by plasma processes associated with ion, electron, and neutral particle dynamics that occur inside the HET's discharge channel and in the plume as the HET electrically interacts with its local operating environment. The extent to which plasma oscillations impact HET discharge dynamics is difficult to quantify due to the complexity of analyzing AC signals, given that the HET is a nonlinear, time-variant electrical load. In this work, we overcome the challenge of nonlinearity and time-variance of HETs by conducting a small-signal impedance analysis to characterize the effective resistance and reactance of the HET discharge with a novel and versatile impedance measurement diagnostic. The impedance magnitude and phase of a 7-kW class HET were measured from 100 Hz to 300 kHz with an excitation signal of ± 2 V pk for two discharge operating conditions on krypton: 4.5 kW, 15 A and 6 kW, 20 A. The results were used to quantify resistive, capacitive, and inducive characteristics present within the HET discharge signature. For the 4.5 kW, 15 A thruster operating condition, the breathing mode capacitance was estimated to be 12.6 µF with an inductance of 15.3 µH. Furthermore, the impedance characteristics of the breathing mode are within ± 2.4 kHz of the power spectral density plots independently generated by time-resolved oscilloscope traces indicating good agreement in the frequency domain. Thus, the impedance measurement tool is a new diagnostic for characterizing the impedance and associated AC characteristics of HETs.

霍尔效应推力器通常被认为是直流电推进装置,因为它们是用隔离的直流电源运行的。然而,众所周知,HET的放电电流具有不同幅度和频率的振荡,因此是具有交流特性的时间函数。观测到的振荡是由等离子体过程引起的,这些等离子体过程与离子、电子和中性粒子动力学有关,这些过程发生在HET的放电通道内部和羽流中,因为HET与局部操作环境发生了电相互作用。由于分析交流信号的复杂性,等离子体振荡对HET放电动力学的影响程度难以量化,因为HET是一个非线性、时变的电负载。在这项工作中,我们通过进行小信号阻抗分析来表征HET放电的有效电阻和电抗,从而克服了HET非线性和时变的挑战,并采用了一种新颖而通用的阻抗测量诊断方法。在±2 V pk的激励信号下,在氪气4.5 kW, 15 a和6 kW, 20 a两种放电工况下,在100 Hz ~ 300 kHz范围内测量了7kw级HET的阻抗幅值和相位。结果用于量化电阻,电容和感应特性存在于HET放电特征。对于4.5 kW, 15 A的推力器工作条件,呼吸模式电容估计为12.6µF,电感为15.3µH。此外,呼吸模式的阻抗特性与时间分辨示波器走线独立生成的功率谱密度图的误差在±2.4 kHz以内,在频域上具有良好的一致性。因此,阻抗测量工具是表征HETs阻抗和相关交流特性的一种新的诊断方法。
{"title":"Hall effect thruster impedance characterization in ground-based vacuum test facilities.","authors":"David R Jovel, Janice D Cabrera, Mitchell L R Walker","doi":"10.1007/s44205-024-00088-9","DOIUrl":"10.1007/s44205-024-00088-9","url":null,"abstract":"<p><p>Hall effect thrusters (HETs) are typically regarded as DC electric propulsion devices as they are operated with isolated DC power supplies. However, it is well known that the HET's discharge current possesses oscillations of varying magnitudes and frequencies and is thus a function of time with AC characteristics. The observed oscillations are caused by plasma processes associated with ion, electron, and neutral particle dynamics that occur inside the HET's discharge channel and in the plume as the HET electrically interacts with its local operating environment. The extent to which plasma oscillations impact HET discharge dynamics is difficult to quantify due to the complexity of analyzing AC signals, given that the HET is a nonlinear, time-variant electrical load. In this work, we overcome the challenge of nonlinearity and time-variance of HETs by conducting a small-signal impedance analysis to characterize the effective resistance and reactance of the HET discharge with a novel and versatile impedance measurement diagnostic. The impedance magnitude and phase of a 7-kW class HET were measured from 100 Hz to 300 kHz with an excitation signal of ± 2 <i>V</i> <sub><i>pk</i></sub> for two discharge operating conditions on krypton: 4.5 kW, 15 A and 6 kW, 20 A. The results were used to quantify resistive, capacitive, and inducive characteristics present within the HET discharge signature. For the 4.5 kW, 15 A thruster operating condition, the breathing mode capacitance was estimated to be 12.6 <i>µ</i>F with an inductance of 15.3 <i>µ</i>H. Furthermore, the impedance characteristics of the breathing mode are within ± 2.4 kHz of the power spectral density plots independently generated by time-resolved oscilloscope traces indicating good agreement in the frequency domain. Thus, the impedance measurement tool is a new diagnostic for characterizing the impedance and associated AC characteristics of HETs.</p>","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":"3 1","pages":"31"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11611958/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142782021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characterization of a C12A7 electride plasma-based cathode using different keeper orifice sizes 使用不同保持器孔径的 C12A7 电解等离子阴极的特性分析
Pub Date : 2023-12-01 DOI: 10.1007/s44205-023-00061-y
C. Drobny, Martin Tajmar
{"title":"Characterization of a C12A7 electride plasma-based cathode using different keeper orifice sizes","authors":"C. Drobny, Martin Tajmar","doi":"10.1007/s44205-023-00061-y","DOIUrl":"https://doi.org/10.1007/s44205-023-00061-y","url":null,"abstract":"","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":"131 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138622486","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
Operational demonstration and experimental characterisation of a central cathode electrostatic thruster equipped with a high temperature superconducting magnet 配备高温超导磁体的中央阴极静电推进器的运行演示和实验表征
Pub Date : 2023-12-01 DOI: 10.1007/s44205-023-00060-z
Chris Acheson, Jakub Glowacki, Ryota Nakano, Daiki Maeshima, Dominik Saile, B. Pavri, Ryohei Takagi, Ryoyu Mori, Randy Pollock, Jamal R. Olatunji, Max Goddard-Winchester, Nicholas M. Strickland, Daisuke Ichihara, Stuart C. Wimbush, Kiyoshi Kinefuchi
{"title":"Operational demonstration and experimental characterisation of a central cathode electrostatic thruster equipped with a high temperature superconducting magnet","authors":"Chris Acheson, Jakub Glowacki, Ryota Nakano, Daiki Maeshima, Dominik Saile, B. Pavri, Ryohei Takagi, Ryoyu Mori, Randy Pollock, Jamal R. Olatunji, Max Goddard-Winchester, Nicholas M. Strickland, Daisuke Ichihara, Stuart C. Wimbush, Kiyoshi Kinefuchi","doi":"10.1007/s44205-023-00060-z","DOIUrl":"https://doi.org/10.1007/s44205-023-00060-z","url":null,"abstract":"","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":" 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138615720","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
Aromatic hydrocarbons as Molecular Propellants for Electric Propulsion Thrusters 芳香烃作为电推进推进器的分子推进剂
Pub Date : 2023-11-16 DOI: 10.1007/s44205-023-00059-6
André Nyberg Borrfors, Dan J. Harding, Jonas Weissenrieder, Simone Ciaralli, Ashley Hallock, Tore Brinck
{"title":"Aromatic hydrocarbons as Molecular Propellants for Electric Propulsion Thrusters","authors":"André Nyberg Borrfors, Dan J. Harding, Jonas Weissenrieder, Simone Ciaralli, Ashley Hallock, Tore Brinck","doi":"10.1007/s44205-023-00059-6","DOIUrl":"https://doi.org/10.1007/s44205-023-00059-6","url":null,"abstract":"","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139266988","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
Emission measurements and in-situ observation of ionic liquid electrospray thrusters with longitudinally grooved emitters 纵向沟槽型离子液体电喷雾推进器的发射测量与现场观测
Pub Date : 2023-10-19 DOI: 10.1007/s44205-023-00057-8
Koki Matsukawa, Yuiko Nakashima, Momoko Naemura, Yoshinori Takao
Abstract An externally wetted emitter array with longitudinally grooved structures for ionic liquid electrospray thrusters was fabricated to improve ionic liquid transport to the emitter tips. Two grooved emitter shapes with different groove depths were successfully fabricated using microelectromechanical system processing techniques. We evaluated the current–voltage characteristics, measured the mass spectra using time-of-flight (ToF) spectrometry, and conducted in-situ observations using a high-speed microscope. The experimental results of ion emission show that the absolute emission current increases compared with that of our previous emitter without grooves. This tendency is strengthened with deeper grooves. Moreover, the slope of the current–voltage curve for the grooved emitters does not decrease even when high voltages are applied, indicating that the grooved structure improves the ionic liquid transport to the emitter tips. This improvement is attributed to the low hydraulic impedance of the emitter structure. However, deeper grooving also increases the percentage of current intercepted by the extractor electrode, and electrochemical reactions are not avoided at an alternation frequency of 1 Hz. Although the first current–voltage measurement tended to have unstable characteristics, the ToF results indicated that the emission in the center line was in the pure-ion regime, composed mostly of monomer and dimer ions, under all the measured conditions. High-speed microscope observations showed that too much ionic liquid deposited on the extractor causes ion emission from the extractor to the emitter, known as backspray, and implies that no large droplets are emitted for either grooved emitter structure, which is consistent with the ToF results.
摘要为提高离子液体向电喷雾推进器尖端的输运,设计了一种具有纵向沟槽结构的外湿润发射极阵列。利用微机电系统加工技术,成功制备了两种不同槽深的沟槽型发射极。我们评估了电流-电压特性,使用飞行时间(ToF)光谱法测量了质谱,并使用高速显微镜进行了原位观察。离子发射实验结果表明,与没有沟槽的发射体相比,绝对发射电流有所增加。沟槽越深,这种趋势就越明显。此外,即使在高电压下,沟槽结构的电流-电压曲线斜率也没有减小,表明沟槽结构改善了离子液体向发射极尖端的输运。这种改进归功于发射器结构的低液压阻抗。然而,更深的沟槽也增加了提取电极截获电流的百分比,并且在1hz的交替频率下无法避免电化学反应。虽然第一次电流-电压测量具有不稳定的特征,但ToF结果表明,在所有测量条件下,中心线的发射都处于纯离子状态,主要由单体和二聚体离子组成。高速显微镜观察发现,离子液体沉积过多会导致离子从提取器向发射器发射,称为反向喷射,这表明沟槽式发射器结构都没有发射大液滴,这与ToF结果一致。
{"title":"Emission measurements and in-situ observation of ionic liquid electrospray thrusters with longitudinally grooved emitters","authors":"Koki Matsukawa, Yuiko Nakashima, Momoko Naemura, Yoshinori Takao","doi":"10.1007/s44205-023-00057-8","DOIUrl":"https://doi.org/10.1007/s44205-023-00057-8","url":null,"abstract":"Abstract An externally wetted emitter array with longitudinally grooved structures for ionic liquid electrospray thrusters was fabricated to improve ionic liquid transport to the emitter tips. Two grooved emitter shapes with different groove depths were successfully fabricated using microelectromechanical system processing techniques. We evaluated the current–voltage characteristics, measured the mass spectra using time-of-flight (ToF) spectrometry, and conducted in-situ observations using a high-speed microscope. The experimental results of ion emission show that the absolute emission current increases compared with that of our previous emitter without grooves. This tendency is strengthened with deeper grooves. Moreover, the slope of the current–voltage curve for the grooved emitters does not decrease even when high voltages are applied, indicating that the grooved structure improves the ionic liquid transport to the emitter tips. This improvement is attributed to the low hydraulic impedance of the emitter structure. However, deeper grooving also increases the percentage of current intercepted by the extractor electrode, and electrochemical reactions are not avoided at an alternation frequency of 1 Hz. Although the first current–voltage measurement tended to have unstable characteristics, the ToF results indicated that the emission in the center line was in the pure-ion regime, composed mostly of monomer and dimer ions, under all the measured conditions. High-speed microscope observations showed that too much ionic liquid deposited on the extractor causes ion emission from the extractor to the emitter, known as backspray, and implies that no large droplets are emitted for either grooved emitter structure, which is consistent with the ToF results.","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135730524","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
Simulations of xenon beam ions emitted from electric thrusters in Earth’s magnetosphere 地球磁层中电推力器发射氙束离子的模拟
Pub Date : 2023-10-13 DOI: 10.1007/s44205-023-00055-w
Kevin D. Sampson, Mark W. Crofton
Abstract This study sought to characterize the behavior of exhausted electric thruster xenon ions in the near-Earth magnetospheric environment as functions of various trajectory and particle attributes, neglecting effects of electric fields, plasma waves and particle collisions. This was done via simulation using the AeroTracer program, a software tool which computes ion trajectories within the magnetosphere by applying an adaptive step-size Runge-Kutta technique to the fully relativistic Lorentz equation. Over 3,800 independent simulations were performed, with variables including release position, release energy and direction, ion charge, and orbital phase. Initial release altitude was a major driver in determining whether the ion eventually fell to Earth (“Below Minimum Altitude” or BMA), remained trapped by the simulation’s end (“Maximum Number of Steps” or MNS), or traveled beyond the magnetosphere (“Lost to Space” or LTS). Ions expelled at the highest altitudes investigated - 60,000 km and above - almost invariably were lost to space. Like altitude, increasing inclination and energy were important factors that reduced trapping, affecting the outcome probabilities. Higher charge state produced strong improvement of trapping capability. Effects of orbital phase, day of year and solar cycle phase were also apparent. A transition region was found in the 20,000 km to 60,000 km altitude range, within which the sensitivity of outcomes to parameter variation increased. The ordered sequence MNS> BMA> LTS was found to be consistent with decreasing confinement capability, and it was manifested consistently as parameters were varied.
在忽略电场、等离子体波和粒子碰撞影响的情况下,研究了近地磁层环境中耗尽的电推力器氙离子在各种轨迹和粒子属性下的行为特征。这是通过AeroTracer程序的模拟完成的,AeroTracer程序是一个软件工具,通过将自适应步长龙格-库塔技术应用于完全相对论的洛伦兹方程来计算磁层内的离子轨迹。进行了超过3800次独立模拟,变量包括释放位置、释放能量和方向、离子电荷和轨道相位。初始释放高度是决定离子最终落向地球(“低于最低高度”或BMA),在模拟结束时仍被困住(“最大步数”或MNS),或超出磁层(“迷失太空”或LTS)的主要驱动因素。在所调查的最高海拔(60000公里及以上)发射的离子几乎无一例外地消失在太空中。与海拔高度一样,增加倾角和能量是减少捕获和影响结果概率的重要因素。较高的电荷态对捕获性能有较强的改善。轨道相位、年初一和太阳周期相位的影响也很明显。在海拔2万~ 6万km范围内存在过渡区,在过渡区内,结果对参数变化的敏感性增大。有序序列MNS>BMA>LTS与约束能力的降低是一致的,且随参数的变化而变化。
{"title":"Simulations of xenon beam ions emitted from electric thrusters in Earth’s magnetosphere","authors":"Kevin D. Sampson, Mark W. Crofton","doi":"10.1007/s44205-023-00055-w","DOIUrl":"https://doi.org/10.1007/s44205-023-00055-w","url":null,"abstract":"Abstract This study sought to characterize the behavior of exhausted electric thruster xenon ions in the near-Earth magnetospheric environment as functions of various trajectory and particle attributes, neglecting effects of electric fields, plasma waves and particle collisions. This was done via simulation using the AeroTracer program, a software tool which computes ion trajectories within the magnetosphere by applying an adaptive step-size Runge-Kutta technique to the fully relativistic Lorentz equation. Over 3,800 independent simulations were performed, with variables including release position, release energy and direction, ion charge, and orbital phase. Initial release altitude was a major driver in determining whether the ion eventually fell to Earth (“Below Minimum Altitude” or BMA), remained trapped by the simulation’s end (“Maximum Number of Steps” or MNS), or traveled beyond the magnetosphere (“Lost to Space” or LTS). Ions expelled at the highest altitudes investigated - 60,000 km and above - almost invariably were lost to space. Like altitude, increasing inclination and energy were important factors that reduced trapping, affecting the outcome probabilities. Higher charge state produced strong improvement of trapping capability. Effects of orbital phase, day of year and solar cycle phase were also apparent. A transition region was found in the 20,000 km to 60,000 km altitude range, within which the sensitivity of outcomes to parameter variation increased. The ordered sequence MNS&gt; BMA&gt; LTS was found to be consistent with decreasing confinement capability, and it was manifested consistently as parameters were varied.","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135855635","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
Characterization of a circular arc electron source for a self-neutralizing air-breathing plasma thruster 自中和空气呼吸等离子体推力器用圆弧电子源的特性研究
Pub Date : 2023-10-12 DOI: 10.1007/s44205-023-00058-7
Anmol Taploo, Vikas Soni, Halen Solomon, Marshall McCraw, Li Lin, Jake Spinelli, Steven P. Shepard, Santiago D. Solares, Michael Keidar
Abstract The paper presents an enhanced version of an arc electron source designed for air ionization applications in a self-neutralizing air-breathing plasma thruster. The arc electron source is specifically suited for the air-breathing plasma thruster, as it allows precise control of mean electron energy levels. This paper focuses on the ionization aspects of air-breathing thrusters through the development of axially magnetized arc electron sources. The sources consist of a circular and coaxial configuration of a metallic arc plasma source coupled with a positively biased grid to extract electrons and control mean electron energy. The average mean electron energy of electrons in the arc electron source is regulated by adjusting the bias voltage of the grid within the range of 0 V – 300 V. To investigate the behavior of ion current density and electron density concerning pressure and mean electron energy, the current probe and magnetic filter were utilized. It was demonstrated that the circular electron source leads to enhanced ionization of airflow by achieving plasma densities greater than 10 18 m −3 . By utilizing a high-speed camera for the circular arc electron source, the arc spot was seen to move azimuthally due to the magnetic field. Furthermore, scanning electron microscopy and a conductance measurement system were employed for the coaxial arc electron source to examine the deposition and conductance of the electron extraction grid. While the grid underwent deposition of about 600 microns, the conductance was observed to increase/saturate with time and bias voltage, indicating an electrically “self-healing material”.
摘要:本文介绍了一种用于自中和空气呼吸等离子体推力器中空气电离应用的增强型电弧电子源。电弧电子源特别适合于空气呼吸等离子体推进器,因为它允许精确控制平均电子能量水平。本文通过研制轴向磁化电弧电子源,重点研究了吸气式推进器的电离问题。该源由金属弧等离子体源的圆形和同轴结构组成,并与正偏置栅格耦合以提取电子并控制平均电子能量。通过调节栅极的偏置电压,在0 V ~ 300 V范围内调节电弧电子源中电子的平均电子能。为了研究离子电流密度和电子密度随压力和平均电子能的变化规律,采用了电流探针和磁滤波器。结果表明,当等离子体密度大于10 18 m−3时,圆形电子源会导致气流的电离增强。利用高速摄像机作为圆弧电子源,观察到圆弧光斑在磁场作用下的方位运动。此外,利用扫描电镜和电导测量系统对同轴电弧电子源的沉积和电导进行了检测。当栅格进行约600微米的沉积时,观察到电导随着时间和偏置电压的增加而增加/饱和,表明电“自愈材料”。
{"title":"Characterization of a circular arc electron source for a self-neutralizing air-breathing plasma thruster","authors":"Anmol Taploo, Vikas Soni, Halen Solomon, Marshall McCraw, Li Lin, Jake Spinelli, Steven P. Shepard, Santiago D. Solares, Michael Keidar","doi":"10.1007/s44205-023-00058-7","DOIUrl":"https://doi.org/10.1007/s44205-023-00058-7","url":null,"abstract":"Abstract The paper presents an enhanced version of an arc electron source designed for air ionization applications in a self-neutralizing air-breathing plasma thruster. The arc electron source is specifically suited for the air-breathing plasma thruster, as it allows precise control of mean electron energy levels. This paper focuses on the ionization aspects of air-breathing thrusters through the development of axially magnetized arc electron sources. The sources consist of a circular and coaxial configuration of a metallic arc plasma source coupled with a positively biased grid to extract electrons and control mean electron energy. The average mean electron energy of electrons in the arc electron source is regulated by adjusting the bias voltage of the grid within the range of 0 V – 300 V. To investigate the behavior of ion current density and electron density concerning pressure and mean electron energy, the current probe and magnetic filter were utilized. It was demonstrated that the circular electron source leads to enhanced ionization of airflow by achieving plasma densities greater than 10 18 m −3 . By utilizing a high-speed camera for the circular arc electron source, the arc spot was seen to move azimuthally due to the magnetic field. Furthermore, scanning electron microscopy and a conductance measurement system were employed for the coaxial arc electron source to examine the deposition and conductance of the electron extraction grid. While the grid underwent deposition of about 600 microns, the conductance was observed to increase/saturate with time and bias voltage, indicating an electrically “self-healing material”.","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135969000","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
Fluid-Kinetic-hybrid simulation for ion thruster using polymorphic particles 基于多态粒子的离子推力器流体-动力学混合仿真
Pub Date : 2023-09-11 DOI: 10.1007/s44205-023-00056-9
Ninad Joshi, Christian Heiliger
Abstract A hybrid Fluid-Kinetic model based on a polymorphic Particle-in-Cell method is developed for the simulation of plasmas in ion thruster. The numerical scheme is suited for scenarios in which thermal ions or electrons undergo strong acceleration. The polymorphic PIC model is tested for the extraction region of an ion thruster. In this paper, we report the results achieved by implementing the scheme on a single extraction orifice and compare our results with the simulation from known IGUN software for ion extraction.
摘要建立了一种基于多态粒子胞内法的混合流体动力学模型,用于离子推力器等离子体的模拟。该数值格式适用于热离子或电子承受强加速度的情况。对离子推力器萃取区多态PIC模型进行了测试。在本文中,我们报告了在单个提取孔上实现该方案所获得的结果,并将我们的结果与已知的IGUN软件中离子提取的模拟结果进行了比较。
{"title":"Fluid-Kinetic-hybrid simulation for ion thruster using polymorphic particles","authors":"Ninad Joshi, Christian Heiliger","doi":"10.1007/s44205-023-00056-9","DOIUrl":"https://doi.org/10.1007/s44205-023-00056-9","url":null,"abstract":"Abstract A hybrid Fluid-Kinetic model based on a polymorphic Particle-in-Cell method is developed for the simulation of plasmas in ion thruster. The numerical scheme is suited for scenarios in which thermal ions or electrons undergo strong acceleration. The polymorphic PIC model is tested for the extraction region of an ion thruster. In this paper, we report the results achieved by implementing the scheme on a single extraction orifice and compare our results with the simulation from known IGUN software for ion extraction.","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135980773","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 method for direct in-space thrust estimation from low-acceleration orbital maneuvers 一种低加速度轨道机动直接估算空间推力的方法
Pub Date : 2023-08-24 DOI: 10.1007/s44205-023-00054-x
Oliver Jia-Richards, Y. Marzouk, P. Lozano
{"title":"A method for direct in-space thrust estimation from low-acceleration orbital maneuvers","authors":"Oliver Jia-Richards, Y. Marzouk, P. Lozano","doi":"10.1007/s44205-023-00054-x","DOIUrl":"https://doi.org/10.1007/s44205-023-00054-x","url":null,"abstract":"","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47517645","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
96 kN-sec endurance test of the R-200 low power hall thruster R-200低功率霍尔推力器的96千秒耐力试验
Pub Date : 2023-07-21 DOI: 10.1007/s44205-023-00053-y
D. Lev, Daniel Katz Franco, R. Zimmerman, Moshe Tordjman, Boaz Auslender, Oren Epstein
{"title":"96 kN-sec endurance test of the R-200 low power hall thruster","authors":"D. Lev, Daniel Katz Franco, R. Zimmerman, Moshe Tordjman, Boaz Auslender, Oren Epstein","doi":"10.1007/s44205-023-00053-y","DOIUrl":"https://doi.org/10.1007/s44205-023-00053-y","url":null,"abstract":"","PeriodicalId":73724,"journal":{"name":"Journal of electric propulsion","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44712707","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
期刊
Journal of electric propulsion
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1