Download or read book The SPT 100 Plasma Plume and Its Interaction with a Spacecraft from Modeling to Ground and Flight Characterization written by Franck Darnon and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Plasma Parameters in the Stationary Plasma Thruster SPT 100 Plume and Its Effects on Spacecraft Components written by S. K. Absalamov and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plume Characterization of the SPT 100 written by Alec D. Gallimore and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Electric Propulsion written by Dan M. Goebel and published by John Wiley & Sons. This book was released on 2023-10-25 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Electric Propulsion Understand the fundamental basis of spaceflight with this cutting-edge guide As spacecraft engineering continues to advance, so too do the propulsion methods by which human beings can seek out the stars. Ion thrusters and Hall thrusters have been the subject of considerable innovation in recent years, and spacecraft propulsion has never been more efficient. For professionals within and adjacent to spacecraft engineering, this is critical knowledge that can alter the future of space flight. Fundamentals of Electric Propulsion offers a thorough grounding in electric propulsion for spacecraft, particularly the features and mechanisms underlying Ion and Hall thrusters. Updated in the light of rapidly expanding knowledge, the second edition of this essential guide detailed coverage of thruster principles, plasma physics, and more. It reflects the historic output of the legendary Jet Propulsion Laboratory and promises to continue as a must-own volume for spacecraft engineering professionals. Readers of the second edition of Fundamentals of Electric Propulsion readers will also find: Extensive updates to chapters covering hollow cathodes and Hall thrusters, based on vigorous recent research New sections covering magnetic shielding, cathode plume instabilities, and more Figures and homework problems in each chapter to facilitate learning and retention Fundamentals of Electric Propulsion is an essential work for spacecraft engineers and researchers working in spacecraft propulsion and related fields, as well as graduate students in electric propulsion, aerospace science, and space science courses.
Download or read book Computational Modeling of Expanded Plasma Plumes in Vacuum and in a Tank written by Bernard Kwaku Asare and published by . This book was released on 1999 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerospace America written by and published by . This book was released on 2000 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterizing Dusty Hypervelocity Impact Plasma Plume Dynamics and Effects written by Benjamin Troy Estacio and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Impacts on spacecraft by dust and orbital debris are a common occurrence. These impacts are termed hypervelocity impacts and have enough energy to vaporize and ionize some of the material in the area of the impact, creating a plasma. Complicating the dynamics is the possibility of non-vaporized ejecta which can interact with the plasma altering the plume dynamics or forming a dusty plasma. An electromagnetic pulse (EMP) can result from these impacts and subsequent expansion of plasma that is potentially dangerous to spacecraft electronics. The focus of this dissertation is understanding and putting in context the results from an experimental campaign at the NASA Ames Vertical Gun Range light gas gun. Non-vaporized charged ejecta is successfully measured with a new set of plasma sensors designed specifically for this experiment. Dust is found to transport a significant amount of plasma through dust-plasma interactions and was found to be unaffected by the applied external electric fields. The neutral background affected the plume dynamics during the experiments. Plumes resulting from impacts on metal targets are separated into two expansion regions. A Rayleigh-Taylor instability is found to form on the inner expansion region at the contact surface between the plume and background gas as the plume is slowed by around 10 km/s. Two different types of FLASH hydrodynamic modeling is used for the first time to expand on analytic modeling and capture how the plume properties evolve under the influence of the gas dynamics. These simulations show that significant plume heating occurs at the contact surface where there is an increased plume density due to the plume bunching as it slows. The heating may contribute to additional ionization leading to the dust moving through a more dense plasma than would be present during an impact in a vacuum. A new EMP mechanism, rapid target charging, is observed to occur from the interaction between the outer expansion and the charged target. Additional evidence for this EMP is newly found in past experiment campaigns. This type of EMP would be explicitly dangerous to spacecraft as it involves the plume coupling to the spacecraft surface or even internal wiring.
Download or read book 39th AIAA ASME SAE ASEE Joint Propulsion Conference Exhibit July 20 23 2003 Huntsville Alabama 03 4400 03 4449 written by and published by . This book was released on 2003 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Thruster Plume Plasma Diagnostics written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-24 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although detailed near field (0 to 3 cm) information regarding the exhaust plume of a two kilowatt arc jet is available (refs. 1 to 6), there is virtually little or no information (outside of theoretical extrapolations) available concerning the far field (2.6 to 6.1 m). Furthermore real information about the plasma at distances between (3 to 6 m) is of critical importance to high technology satellite companies in understanding the effect of arc jet plume exhausts on space based power systems. It is therefore of utmost importance that one understands the exact nature of the interaction between the arc jet plume, the spacecraft power system and the surrounding electrical plasma environment. A good first step in understanding the nature of the interactions lies in making the needed plume parameter measurements in the far field. All diagnostic measurements are performed inside a large vacuum system (12 m diameter by 18 m high) with a full scale arc jet and solar array panel in the required flight configuration geometry. Thus, necessary information regarding the plume plasma parameters in the far field is obtained. Measurements of the floating potential, the plasma potential, the electron temperature, number density, density distribution, debye length, and plasma frequency are obtained at various locations about the array (at vertical distances from the arc jet nozzle: 2.6, 2.7, 2.8, 3.2, 3.6, 4.0, 4.9, 5.0, 5.4, 5.75, and 6.14 m). Plasma diagnostic parameters are measured for both the floating and grounded configurations of the arc jet anode and array. Spectroscopic optical measurements are then acquired in close proximity to the nozzle, and contamination measurements are made in the vicinity of the array utilizing a mass spectrometer and two Quartz Crystal Microbalances (QCM's). Galofaro, Joel T. and Vayner, Boris V. and Hillard, G. Barry and Chornak, Michael T. Glenn Research Center NASA/TM-2005-213837, E-15207
Download or read book Performance Evaluation of the SPT 140 written by and published by . This book was released on 1997 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Comparison of Sputtering Models for Plasma Surface Interactions written by and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interaction of electric propulsion plumes with spacecraft surfaces is studied in order to predict possible spacecraft contamination. For example, ions in the plume may cause surface sputtering and this sputtered material may be deposited on other surfaces. Several models exist for the sputtering of surface material by ion bombardment based on various experimental data. These models depend on the ion species and materials from the data. In order to assess the uncertainty in sputtering predictions, this paper will present a comparison of models for sputtering of spacecraft materials due to operation of Hall-effect thrusters using xenon as a propellent. How this sputtering affects the redeposition will also be examined. The sputter yield versus angle for 300eV ions hitting aluminum and silver is shown in the figure below for two models. The one labeled "R" is from Roussel et al., "Numerical Simulation of Induced Environment, Sputtering and Contamination of Satellite due to Electric Propulsion," Proc. Second European Spacecraft Propulsion Conf. 1997. The other (labeled "Y") is from Yamamura et al., "Angular Dependence of Sputtering Yields on Monatomic Solids", Institute of Plasma Physics, Nagoya University, June 1983. A 3-D plasma interaction modeling system named COLISEUM has been developed and will be used as a tool to test these models as well as others - (for example Kannenberg et al., "Validation of Hall Thruster Plume Sputter Model', 37th IPC, July 2001).
Download or read book Modelling of Plasma Thruster Plumes for Spacecraft Plume impingement Analysis written by and published by . This book was released on 2010 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Electric Propulsion written by Dan M. Goebel and published by John Wiley & Sons. This book was released on 2008-12-22 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout most of the twentieth century, electric propulsion was considered the technology of the future. Now, the future has arrived. This important new book explains the fundamentals of electric propulsion for spacecraft and describes in detail the physics and characteristics of the two major electric thrusters in use today, ion and Hall thrusters. The authors provide an introduction to plasma physics in order to allow readers to understand the models and derivations used in determining electric thruster performance. They then go on to present detailed explanations of: Thruster principles Ion thruster plasma generators and accelerator grids Hollow cathodes Hall thrusters Ion and Hall thruster plumes Flight ion and Hall thrusters Based largely on research and development performed at the Jet Propulsion Laboratory (JPL) and complemented with scores of tables, figures, homework problems, and references, Fundamentals of Electric Propulsion: Ion and Hall Thrusters is an indispensable textbook for advanced undergraduate and graduate students who are preparing to enter the aerospace industry. It also serves as an equally valuable resource for professional engineers already at work in the field.
Download or read book Computational Modeling of Expanding Plasma Plumes in Space Using a PIC DSMC Algorithm written by and published by . This book was released on 1997 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive computational model of the plume of a Hall Thruster is presented. Spacecraft-plume interaction issues are addressed by studying how a partially ionized plasma expands in three dimensions and interacts with the surfaces it encounters. A quantitative analysis of fundamental parameters is used to show that the plume is an unmagnetized, quasi-neutral plasma in which Charge Exchange collisions play a significant role. The electrons are shown to be isothermal and collisionless and the electron momentum equation is shown to reduce to the Boltzmann relationship. An axisymmetric computational model of the plume is described in detail. The model combines the Particle-in-Cell (PIC) and Direct Simulation Monte Carlo (DSMC) methods to create a quasi-neutral PIC-DSMC model. The resulting model is relatively fast and is used to model meter scale objects on workstation class computers. Comparisons are made to experimental data from multiple sources. The model is shown to have good agreement with macroscopic quantities such as current densities and sputtering rates but poor agreement with microscopic quantities like the ion distribution function. Disagreement is thought to be due to inadequicies in the plasma source model. Further results are presented showing the thruster operating in vacuum. 'Rules of thumb' are recommended for scaling erosion rates.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plasma Turbulence in the Solar System written by Yasuhito Narita and published by Springer Science & Business Media. This book was released on 2012-01-21 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamics of astrophysical systems is often described by plasma physics, yet understanding the nature of plasma turbulence remains as a challenge in physics in both theories and experiments. This book is an up-to-date summary and review of recent results in research on waves and turbulence in near-Earth space plasma turbulence, obtained by Cluster, the multi-spacecraft mission. Spatial and temporal structures of solar wind turbulence as well as its interaction with the bow shock ahead of the Earth are presented using Cluster data. The book presents (1) historical developments, (2) theoretical background of plasma physics, turbulence theories, and the plasma physical picture of the solar system, (3) analysis methods for multi-spacecraft data, (4) results of Cluster data analysis, and (5) impacts on astrophysics and Earth sciences.
