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Numerical Modelling Of A Radio Frequency Micro Ion Thruster
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Book Synopsis Numerical Modelling of a Radio-frequency Micro Ion Thruster by : Michael Meng-Tsuan Tsay
Download or read book Numerical Modelling of a Radio-frequency Micro Ion Thruster written by Michael Meng-Tsuan Tsay and published by . This book was released on 2006 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple performance model is developed for an inductively-coupled radio-frequency micro ion thruster. Methods of particle and energy balance are utilized for modeling the chamber plasma discharge. A transformer model is incorporated in the equations of energy balance for investigating the effect of plasma on the primary circuit and for calculating the absorbed power by the plasma. A simple and one-dimensional ion extraction model is developed based on experimental observation and the result is validated with experimental data. Performance of the RF micro ion thruster is satisfactory with thrust and specific impulse of approximately 2 mN and 2000 seconds, respectively. Comparison is made with a miniature bombardment-type ion thruster, and the RF ion thruster is found to be more efficient when the coupling efficiency is above 80%. Optimization in driving frequency increases power absorption and ionization fraction tremendously. It has a positive but limited effect on propulsive performance as the ion beam current is space-charge limited.
Book Synopsis Numerical Modelling and Optimisation of Radio-frequency Ion Thrusters by : Martin Felix Closs
Download or read book Numerical Modelling and Optimisation of Radio-frequency Ion Thrusters written by Martin Felix Closs and published by Herbert Utz Verlag. This book was released on 2002 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Results from Numerical Modelling of RF Ion Thrusters by : Martin F. Cross
Download or read book Results from Numerical Modelling of RF Ion Thrusters written by Martin F. Cross and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Two-dimensional Numerical Modeling of Radio-Frequency Ion Engine Discharge by : Michael Meng-Tsuan Tsay
Download or read book Two-dimensional Numerical Modeling of Radio-Frequency Ion Engine Discharge written by Michael Meng-Tsuan Tsay and published by . This book was released on 2010 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small satellites are gaining popularity in the space industry and reduction in spacecraft size requires scaling down its propulsion system. Low-power electric propulsion poses a unique challenge due to various scaling penalties. Of high-performance plasma thrusters, the radio-frequency ion engine is most likely to succeed in scaling as it does not require an externally applied magnetic field and is structurally simple to construct. As part of a design package an original two-dimensional simulation code for radio-frequency ion engine discharge is developed. The code models the inductive plasma with fluid assumption and resolves the electromagnetic wave in the time domain. Major physical effects considered include magnetic field diffusion and coupling, plasma current induction and ambipolar plasma diffusion. The discharge simulation is benchmarked with data from an experimental thruster. It shows excellent performance in predicting the load power and the internal power loss of the plasma. Predictability of anode current depends on the operating power but is generally adequate. Optimum skin depth on the order of half of chamber radius is suggested by the simulation. The code also demonstrates excellent scaling ability as it successfully predicts the performance of a smaller thruster with errors less than 10%. Using the code a brief optimization study was conducted and the results suggest the maximum thrust efficiency does not necessarily occur at the same frequency that maximizes the power coupling efficiency of the matching circuit.
Book Synopsis Numerical Modeling of Ion Dynamics in a Carbon Nanotube Field-ionized Thruster by : Sarah F. Michael
Download or read book Numerical Modeling of Ion Dynamics in a Carbon Nanotube Field-ionized Thruster written by Sarah F. Michael and published by . This book was released on 2011 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon nanotube field ionization technology has the potential to make ion propulsion feasible for use in micro and nano-satellites. To better understand the phenomenon and optimize the ion thruster design, it is useful to have an accurate model of the system. Numerical modeling of large-scale electron bombardment ion engines is a relatively mature field, but modeling of field-ionized ion engines is in its infancy. A simpler code may be appropriate for the early modeling stages of carbon nanotube field ionization technology; one such software package is spiffe. Spiffe is intended for modeling axisymmetric radio frequency guns, but it contains all the code necessary for basic modeling of ion optics in a field-ionized ion thruster. This work analyzes the feasibility of spiffe software for use in modeling field-ionized ion thrusters. It also provides detailed procedures for its use. In this work, spiffe is first verified to agree with theoretical predictions of limits in a one-dimensional approximation using electrons. Two primary geometries and their boundary conditions are investigated. The geometry is then varied to test the limits of the one-dimensional approximation. This was further altered to simulate singly-charged Argon ions and verified against theoretical onedimensional limits. A supplemental user's guide was developed to aid students with minimal programming experience to quickly become familiar with the methods used in spiffe and the impact of program options on the results. A guide to quickly post-processing the data was also developed.
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 Numerical Simulation of Ion Thruster Optics by :
Download or read book Numerical Simulation of Ion Thruster Optics written by and published by . This book was released on 2003 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulation of Ion Thruster and Stationary Plasma Thruster Exhaust Beam Electrostatic Potential Fields by : Michael Sanghun Rhee
Download or read book Numerical Simulation of Ion Thruster and Stationary Plasma Thruster Exhaust Beam Electrostatic Potential Fields written by Michael Sanghun Rhee and published by . This book was released on 1995 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a Plasma Simulation Tool for Radio Frequency Ion Thrusters by : Robert Henrich
Download or read book Development of a Plasma Simulation Tool for Radio Frequency Ion Thrusters written by Robert Henrich and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulations of the Plumes of Electric Propulsion Thrusters by : Douglas Bryan VanGilder
Download or read book Numerical Simulations of the Plumes of Electric Propulsion Thrusters written by Douglas Bryan VanGilder and published by . This book was released on 2000 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modelling and Design of Inductively Coupled Radio Frequency Gridded Ion Thrusters with an Application to Ion Beam Shepherd Type Space Missions by : Mantas Dobkevicius
Download or read book Modelling and Design of Inductively Coupled Radio Frequency Gridded Ion Thrusters with an Application to Ion Beam Shepherd Type Space Missions written by Mantas Dobkevicius and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulation of Ion Thruster Optics by : Cody C. Farnell
Download or read book Numerical Simulation of Ion Thruster Optics written by Cody C. Farnell and published by . This book was released on 2003 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Models of Hall Thruster Ionization Oscillations by : Ewan Samuel Kay
Download or read book Numerical Models of Hall Thruster Ionization Oscillations written by Ewan Samuel Kay and published by . This book was released on 2016 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, low frequency ionization oscillations in Hall thrusters resembling the breathing mode are studied through computational simulation. The relationship between wall erosion and discharge current oscillations is analyzed using particle-in-cell simulation, and a series of parametric simulations is used to determine the effects of macro-particle size, floating body potential, electron injection region, ion time step size, grid refinement, heavy particle mass reduction, and an artificial permittivity factor. These studies help to determine the parameters that will produce accurate simulations in the future, and identify the parts of the model that need improvement. One-dimensional steady and unsteady Hall thruster models, as well as a generalized sheath model are then developed, and the effects of the parameters that determine stability on the thruster’s operating conditions are determined.
Book Synopsis Monthly Catalog of United States Government Publications by : United States. Superintendent of Documents
Download or read book Monthly Catalog of United States Government Publications written by United States. Superintendent of Documents and published by . This book was released on 1991 with total page 1434 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Book Synopsis Monthly Catalogue, United States Public Documents by :
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1995 with total page 1208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of a Miniature Radio Frequency Ion Thruster with an Inductively Coupled Plasma Source by : Peter Paul Bumbarger
Download or read book Analysis of a Miniature Radio Frequency Ion Thruster with an Inductively Coupled Plasma Source written by Peter Paul Bumbarger and published by . This book was released on 2013 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Journal of Propulsion and Power by :
Download or read book Journal of Propulsion and Power written by and published by . This book was released on 2008 with total page 822 pages. Available in PDF, EPUB and Kindle. Book excerpt:
