Journal of electric propulsion最新文献_第3页

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

Journal of electric propulsion 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

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

Journal of electric propulsion 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

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

Journal of electric propulsion Pub Date : 2023-10-19 DOI: 10.1007/s44205-023-00057-8

Koki Matsukawa, Yuiko Nakashima, Momoko Naemura, Yoshinori Takao

{"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

Journal of electric propulsion Pub Date : 2023-10-13 DOI: 10.1007/s44205-023-00055-w

Kevin D. Sampson, Mark W. Crofton

{"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> BMA> 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

Journal of electric propulsion 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

{"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

Journal of electric propulsion Pub Date : 2023-09-11 DOI: 10.1007/s44205-023-00056-9

Ninad Joshi, Christian Heiliger

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

Journal of electric propulsion Pub Date : 2023-08-24 DOI: 10.1007/s44205-023-00054-x

Oliver Jia-Richards, Y. Marzouk, P. Lozano

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

Journal of electric propulsion 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

引用次数: 0

A scaling methodology for high-power magnetically shielded Hall thrusters 大功率磁屏蔽霍尔推进器的标度方法

Journal of electric propulsion Pub Date : 2023-05-18 DOI: 10.1007/s44205-023-00049-8

Guido Giammarinaro, Francesco Marconcini, G. Becatti, M. Saravia, M. Andrenucci, F. Paganucci

引用次数: 0

Plasma parameter measurement on a RIT-10 using empirical correlations between non-invasive optical emission spectroscopy and Langmuir diagnostics 利用非侵入性光学发射光谱和朗缪尔诊断法之间的经验相关性测量RIT-10的等离子体参数

Journal of electric propulsion Pub Date : 2023-05-10 DOI: 10.1007/s44205-023-00052-z

Felix Becker, B. Nauschütt, Limei Chen, K. Holste, P. Klar

引用次数: 0