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Field Emission Electric Propulsion Feep
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Book Synopsis Modeling and Parametric Performance Analysis of Field Emission Electric Propulsion by : Dinaol Gadisa
Download or read book Modeling and Parametric Performance Analysis of Field Emission Electric Propulsion written by Dinaol Gadisa and published by GRIN Verlag. This book was released on 2023-03-22 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2023 in the subject Engineering - Aerospace Technology, grade: 3,4, , language: English, abstract: Space electric propulsion is required not only for orbit raising and transfer, position control, and station keeping, but also for spacecraft attitude control, advanced thermal material testing, and end-of-life de-orbiting that is much more fuel efficient than conventional chemical rockets. FEEP thruster is one type of ion propulsion system that provides a low thrust of the order of micro-Newton (μN) to milli-Newton (mN) that is primarily used for precise spacecraft attitude control with extremely high efficiency and small impulse bits based on the exhaust velocity of an ejected ion from a thruster. This thesis report includes a mathematical and 3D CAD model of a FEEP thruster with the overarching goal of investigating and analyzing the thruster’s parametric performance. To accomplish this, a MATLAB program was used to simulate the change in thrust and exhaust velocity over time using various types of liquid metal as a propellant, assuming the fuel mass is equal to the atomic mass of the propellant, the wet mass of the spacecraft is assumed to be 4kg, and the charge of an ion is assumed to be 1.602 × 10−19 while the supplied voltage is held constant at 10 kV. Furthermore, because the porous crown emitter is the heart of the FEEP thruster, its stiffness and topology optimization were investigated. The simulation results show that the thrust value of the FEEP thruster over time ranges from 0.213μN to 211mN during stable ion flow rate and mass expulsion of indium propellant, implying that the result is comparable to realistic FEEP parameters. Furthermore, as expected, increasing the voltage between the emitter and extractor electrodes and decreasing the mass expulsion of the propellant increased the thrust value of the FEEP thruster.
Book Synopsis Field Emission Electric Propulsion (FEEP) by : D. Laurini
Download or read book Field Emission Electric Propulsion (FEEP) written by D. Laurini and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Field-emission-electric-propulsion (FEEP) Plasma Modeling by : M. Tajmar
Download or read book Field-emission-electric-propulsion (FEEP) Plasma Modeling written by M. Tajmar and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a Performance Model for a Field Emission Electric Propulsion System by : David Michael Jelem
Download or read book Development of a Performance Model for a Field Emission Electric Propulsion System written by David Michael Jelem and published by . This book was released on 2016 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within this master's thesis the performance of a field emission ion thruster using Indium as propellent is investigated. The core element of this propulsion system is a crown made of porous tungsten needles, infiltrated with liquid indium. If high voltage is applied to this crown, the field strength is sufficiently high to start ionic field emission at the needle tips. This highly energetic ion beam is then directed in one direction to create thrust of up to 400 $\mu N$. An established analytical method for the emission current, which up to now relied on the assumption of a parabolically shaped needle, was extended by taking the actual field geometry of the emitting needle tips into account. To solve the electric potential for a set of boundary condition points obtained from a 3D scan of the needles, a numeric algorithm was developed that computes an approximate solution of the Laplace equation. This way a significantly improved agreement with experimentally measured current - voltage characteristics could be achieved. Combining the impedance model with empirical data for the mass efficiency as a function of the emitted current, the form factor of the ion beam and the electrical efficiency, allowed to model the performance of a FEEP thruster within the entire operational envelope. This model was used to predict the performance envelope of the newly developed IFM nano thruster with different emitters and to identify the engineering challenges that need to be overcome to improve FEEP systems in the future.*****Within this master's thesis the performance of a field emission ion thruster using Indium as propellent is investigated. The core element of this propulsion system is a crown made of porous tungsten needles, infiltrated with liquid indium. If high voltage is applied to this crown, the field strength is sufficiently high to start ionic field emission at the needle tips. This highly energetic ion beam is then directed in one direction to create thrust of up to 400 $\mu N$. An established analytical method for the emission current, which up to now relied on the assumption of a parabolically shaped needle, was extended by taking the actual field geometry of the emitting needle tips into account. To solve the electric potential for a set of boundary condition points obtained from a 3D scan of the needles, a numeric algorithm was developed that computes an approximate solution of the Laplace equation. This way a significantly improved agreement with experimentally measured current - voltage characteristics could be achieved. Combining the impedance model with empirical data for the mass efficiency as a function of the emitted current, the form factor of the ion beam and the electrical efficiency, allowed to model the performance of a FEEP thruster within the entire operational envelope. This model was used to predict the performance envelope of the newly developed IFM nano thruster with different emitters and to identify the engineering challenges that need to be overcome to improve FEEP systems in the future.
Book Synopsis Fundamentals of Electric Propulsion by : Dan M. Goebel
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.
Book Synopsis 3D Numerical Plasmasimulation and Backflow Contamination of a Cesium Field-emission-electric-propulsion (FEEP) Emitter and Thermionic Neutralizer by : Martin Tajmar
Download or read book 3D Numerical Plasmasimulation and Backflow Contamination of a Cesium Field-emission-electric-propulsion (FEEP) Emitter and Thermionic Neutralizer written by Martin Tajmar and published by . This book was released on 1999 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cold Cathodes II written by M. Cahay and published by The Electrochemical Society. This book was released on 2002 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Micropropulsion for Small Spacecraft by : Michael Matthew Micci
Download or read book Micropropulsion for Small Spacecraft written by Michael Matthew Micci and published by AIAA. This book was released on 2000 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Smaller Satellites: Bigger Business? by : Michael J Rycroft
Download or read book Smaller Satellites: Bigger Business? written by Michael J Rycroft and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt: Y. Fujimori, Symposium Programme Committee Chair, and Faculty Member, International Space University e-mail: [email protected] M.Rycroft, Faculty Member, International Space University e-mail: [email protected] N. Crosby, International Space University e-mail: [email protected] For the sixth annual ISU Symposium the theme was "Smaller Satellites: Bigger Business? Concepts, Applications and Markets for Micro/Nanosatellites in a New Information World". Thus, the Symposium addressed the crucial question: are small satellites the saviour of space programmes around the world It did this from the unique perspective of the International Space today? University - the interdisciplinary, international and intercultural perspective. This Symposium brought together a variety of people working on small satellites - engineers, scientists, planners, providers, operators, policy makers and business executives, together with representatives from regulatory bodies, from national and international organizations, and from the finance sector, and also entrepreneurs. Discussion and debate were encouraged, based on the papers presented and those published here.
Book Synopsis Galileo Galilei (GG) by : Anna Maria Nobili
Download or read book Galileo Galilei (GG) written by Anna Maria Nobili and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics of Electric Propulsion by : Robert G. Jahn
Download or read book Physics of Electric Propulsion written by Robert G. Jahn and published by Courier Corporation. This book was released on 2012-12-19 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geared toward advanced undergraduates and graduate students, this text develops the concepts of electrical acceleration of gases for propulsion, from primary physical principles to realistic space thruster designs. 1968 edition.
Book Synopsis Design and Validation of a Low Backsputtering Facility for FEEP Lifetime Testing by : Álvaro Blay Sempere
Download or read book Design and Validation of a Low Backsputtering Facility for FEEP Lifetime Testing written by Álvaro Blay Sempere and published by . This book was released on 2019 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field-emission electric propulsion (FEEP) technology can reach a very high specific impulse and is therefore a competitive candidate for missions that require very high total momentum, delivered over a long mission lifespan. Therefore, it is especially relevant to maximize the time that such thrusters can be tested. Previous life-time testing has often resulted in contamination of the emission sites with Aluminium, which is most likely caused by back-sputtered material from the testing facility. This contamination is not representative for operation in orbit, but for testing purposes, Enpulsion seeks to develop a new vacuum facility that is optimized to reduce the Aluminium backflow by using high voltage electrodes to redirect the ion beam. By deflecting the beam to a location without direct line of sight with the thruster, back-sputtered particles cannot directly flow from the chamber wall to the emitter, and the sputtering contamination can be minimised. In this thesis, the feasibility of such facility will be proven, to be later designed and validated experimentally. The design of the facility will be supported by simulations in COMSOL Multiphysics, using the AC/DC and Charged Particle Tracing modules.*****Field-emission electric propulsion (FEEP) technology can reach a very high specific impulse and is therefore a competitive candidate for missions that require very high total momentum, delivered over a long mission lifespan. Therefore, it is especially relevant to maximize the time that such thrusters can be tested. Previous life-time testing has often resulted in contamination of the emission sites with Aluminium, which is most likely caused by back-sputtered material from the testing facility. This contamination is not representative for operation in orbit, but for testing purposes, Enpulsion seeks to develop a new vacuum facility that is optimized to reduce the Aluminium backflow by using high voltage electrodes to redirect the ion beam. By deflecting the be
Book Synopsis Space Vehicle Maneuvering, Propulsion, Dynamics and Control by : Ranjan Vepa
Download or read book Space Vehicle Maneuvering, Propulsion, Dynamics and Control written by Ranjan Vepa and published by Springer Nature. This book was released on with total page 553 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nanosatellites by : Rogerio Atem de Carvalho
Download or read book Nanosatellites written by Rogerio Atem de Carvalho and published by John Wiley & Sons. This book was released on 2020-03-16 with total page 703 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanosatellites: Space and Ground Technologies, Operations and Economics Rogerio Atem de Carvalho, Instituto Federal Fluminense, Brazil Jaime Estela, Spectrum Aerospace Group, Germany and Peru Martin Langer, Technical University of Munich, Germany Covering the latest research on nanosatellites Nanosatellites: Space and Ground Technologies, Operations and Economics comprehensively presents the latest research on the fast-developing area of nanosatellites. Divided into three distinct sections, the book begins with a brief history of nanosatellites and introduces nanosatellites technologies and payloads, also explaining how these are deployed into space. The second section provides an overview of the ground segment and operations, and the third section focuses on the regulations, policies, economics, and future trends. Key features: Payloads for nanosatellites Nanosatellites components design Examines the cost of development of nanosatellites. Covers the latest policies and regulations. Considers future trends for nanosatellites. Nanosatellites: Space and Ground Technologies, Operations and Economics is a comprehensive reference for researchers and practitioners working with nanosatellites in the aerospace industry.
Book Synopsis Fundamentals of Electric Propulsion by : Dan M. Goebel
Download or read book Fundamentals of Electric Propulsion written by Dan M. Goebel and published by John Wiley & Sons. This book was released on 2023-11-30 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.
Book Synopsis MEMS and Microstructures in Aerospace Applications by : Robert Osiander
Download or read book MEMS and Microstructures in Aerospace Applications written by Robert Osiander and published by CRC Press. This book was released on 2018-10-03 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: The promise of MEMS for aerospace applications has been germinating for years, and current advances bring the field to the very cusp of fruition. Reliability is chief among the challenges limiting the deployment of MEMS technologies in space, as the requirement of zero failure during the mission is quite stringent for this burgeoning field. MEMS and Microstructures in Aerospace Applications provides all the necessary tools to overcome these obstacles and take MEMS from the lab bench to beyond the exosphere. The book begins with an overview of MEMS development and provides several demonstrations of past and current examples of MEMS in space. From this platform, the discussion builds to fabrication technologies; the effect of space environmental factors on MEMS devices; and micro technologies for space systems, instrumentation, communications, thermal control, guidance navigation and control, and propulsion. Subsequent chapters explore factors common to all of the described systems, such as MEMS packaging, handling and contamination control, material selection for specific applications, reliability practices for design and application, and assurance practices. Edited and contributed by an outstanding team of leading experts from industry, academia, and national laboratories, MEMS and Microstructures in Aerospace Applications illuminates the path toward qualifying and integrating MEMS devices and instruments into future space missions and developing innovative satellite systems.
Download or read book Plasma Propulsion written by Fouad Sabry and published by One Billion Knowledgeable. This book was released on 2021-10-13 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: What Is Plasma Propulsion A SpaceX Starship powered by chemical methylox engines will take up to six months to reach Mars. On Earth, radiation exposure is less than 2.5 milliseiverts per year. On their approach to Mars, colonists will face levels 300 times higher than that. Can we use superconducting advanced plasma propulsion technologies to cut the time down to 30 days? Neutron Star Systems has developed an improved magnetoplasmadynamic thruster system that uses rare earth barium copper oxide high temperature superconducting electromagnets to significantly improve plasma propulsion performance while consuming less electricity. This could be the way of the future for spaceflight propulsion. Technically, there are two types of propulsion systems namely chemical and electric depending on the sources of the fuel. Electrostatic thrusters are used for launching small satellites in low earth orbit which are capable to provide thrust for long time intervals. These thrusters consume less fuel compared to chemical propulsion systems. Therefore for the cost reduction interests, space scientists are interested to develop thrusters based on electric propulsion technology. Can SpaceX use Advanced Plasma Propulsion for Starship? How You Will Benefit (I) Insights, and validations about the following topics: Chapter 1: Plasma Propulsion Engine Chapter 2: Spaceflight Chapter 3: Wingless Electromagnetic Air Vehicle Chapter 4: Electrically Powered Spacecraft Propulsion Chapter 5: Ion thruster Chapter 6: Stellarator Chapter 7: Electric sail Chapter 8: MagBeam Chapter 9: Spacecraft propulsion Chapter 10: Advanced Electric Propulsion System Chapter 11: Anti-gravity Chapter 12: Artificial gravity (II) Answering the public top questions about plasma propulsion. (III) Real world examples for the usage of plasma propulsion in many fields. (IV) 17 appendices to explain, briefly, 266 emerging technology in each industry to have 360-degree full understanding of plasma propulsion' technologies. Who This Book Is For Professionals, undergraduate and graduate students, enthusiasts, hobbyists, and those who want to go beyond basic knowledge or information for any kind of plasma propulsion.
