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Ion And Electron Transport In An Nstar Derivative Ion Thruster Nasa
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Book Synopsis Ion and Electron Transport in an Nstar-derivative Ion Thruster ... Nasa by : United States. National Aeronautics and Space Administration
Download or read book Ion and Electron Transport in an Nstar-derivative Ion Thruster ... Nasa written by United States. National Aeronautics and Space Administration and published by . This book was released on 2003* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721261611 Total Pages :32 pages Book Rating :4.2/5 (616 download)
Book Synopsis Inter-Cusp Ion and Electron Transport in a Nstar-Derivative Ion Thruster by : National Aeronautics and Space Administration (NASA)
Download or read book Inter-Cusp Ion and Electron Transport in a Nstar-Derivative Ion Thruster written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffusion of electrons and ions to anode surfaces between the magnetic cusps of a NASA Solar Electric Propulsion Technology Application Readiness ion thruster has been characterized. Ion flux measurements were made at the anode and at the screen grid electrode. The measurements indicated that the average ion current density at the anode and at the screen grid were approximately equal. Additionally, it was found that the electron flux to the anode between cusps is best described by the classical cross-field diffusion coefficient. Foster, John E. Glenn Research Center NASA/TM-2001-210669, NAS 1.15:210669, E-12535
Book Synopsis Ion and Electron Transport in an NSTAR-Derivative Ion Thruster by :
Download or read book Ion and Electron Transport in an NSTAR-Derivative Ion Thruster written by and published by . This book was released on 2001 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis INTER-CUSP ION AND ELECTRON TRANSPORT IN A NSTAR-DERIVATIVE ION THRUSTER... NASA/TM-2001-210669... AUG. 16, 2001 by :
Download or read book INTER-CUSP ION AND ELECTRON TRANSPORT IN A NSTAR-DERIVATIVE ION THRUSTER... NASA/TM-2001-210669... AUG. 16, 2001 written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ion and electron transport in an NSTAR-derivative ion thruster by : John E. Foster
Download or read book Ion and electron transport in an NSTAR-derivative ion thruster written by John E. Foster and published by . This book was released on 2001 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhancing Space Transportation : the NASA Program to Develop Electric Propulsion by :
Download or read book Enhancing Space Transportation : the NASA Program to Develop Electric Propulsion written by and published by . This book was released on 1990 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781724087355 Total Pages :40 pages Book Rating :4.0/5 (873 download)
Book Synopsis Plume and Discharge Plasma Measurements of an Nstar-Type Ion Thruster by : National Aeronautics and Space Adm Nasa
Download or read book Plume and Discharge Plasma Measurements of an Nstar-Type Ion Thruster written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-27 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The success of the NASA Deep Space I spacecraft has demonstrated that ion propulsion is a viable option for deep space science missions. More aggressive missions such as Comet Nuclear Sample Return and Europa lander will require higher power, higher propellant throughput and longer thruster lifetime than the NASA Solar Electric Propulsion Technology Application Readiness (NSTAR) engine. Presented here are thruster plume and discharge plasma measurements of an NSTAR-type thruster operated from 0.5 kW to 5 kW. From Faraday plume sweeps, beam divergence was determined. From Langmuir probe plume measurements on centerline, low energy ion production on axis due to charge-exchange and direct ionization was assessed. Additionally, plume plasma potential measurements made on axis were used to determine the upper energy limits at which ions created on centerline could be radially accelerated. Wall probes flush-mounted to the thruster discharge chamber anode were used to assess plasma conditions. Langmuir probe measurements at the wall indicated significant differences in the electron temperature in the cylindrical and conical sections of the discharge chamber. Foster, John E and Soulas, George C. and Patterson, Michael J. Glenn Research Center NASA/TM-2000-210382, E-12438, AIAA Paper 2000-3812, NAS 1.15:210382
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.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721284504 Total Pages :36 pages Book Rating :4.2/5 (845 download)
Book Synopsis Improving the Total Impulse Capability of the Nstar Ion Thruster with Thick-Accelerator-Grid Ion Optics by : National Aeronautics and Space Administration (NASA)
Download or read book Improving the Total Impulse Capability of the Nstar Ion Thruster with Thick-Accelerator-Grid Ion Optics written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-19 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of performance tests with thick-accelerator-grid (TAG) ion optics are presented. TAG ion optics utilize a 50 percent thicker accelerator grid to double ion optics' service life. NSTAR ion optics were also tested to provide a baseline performance for comparison. Impingement-limited total voltages for the TAG ion optics were only 0 to 15 V higher than those of the NSTAR ion optics. Electron backstreaming limits for the TAG ion optics were 3 to 9 V higher than those for the NSTAR optics due to the increased accelerator grid thickness for the TAG ion optics. Screen grid ion transparencies for the TAG ion optics were only about 2 percent lower than those for the NSTAR optics, reflecting the lower physical screen grid open area fraction of the TAG ion optics. Accelerator currents for the TAG ion optics were 19 to 43 percent greater than those for the NSTAR ion optics due, in part, to a sudden increase in accelerator current during TAG ion optics' performance tests for unknown reasons and to the lower-than-nominal accelerator aperture diameters. Beam divergence half-angles that enclosed 95 percent of the total beam current and beam divergence thrust correction factors for the TAG ion optics were within 2 degrees and 1 percent, respectively, of those for the NSTAR ion optics. Soulas, George C. Glenn Research Center; Jet Propulsion Laboratory; Marshall Space Flight Center NASA/TM-2001-211276, NAS 1.15:211276, E-13075
Book Synopsis Ion Engine and Hall Thruster Development at the NASA Glenn Research Center by :
Download or read book Ion Engine and Hall Thruster Development at the NASA Glenn Research Center written by and published by . This book was released on 2002 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781721531929 Total Pages :30 pages Book Rating :4.5/5 (319 download)
Book Synopsis Ion Engine and Hall Thruster Development at the NASA Glenn Research Center by : National Aeronautics and Space Administration (NASA)
Download or read book Ion Engine and Hall Thruster Development at the NASA Glenn Research Center written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-20 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: NASA's Glenn Research Center has been selected to lead development of NASA's Evolutionary Xenon Thruster (NEXT) system. The central feature of the NEXT system is an electric propulsion thruster (EPT) that inherits the knowledge gained through the NSTAR thruster that successfully propelled Deep Space 1 to asteroid Braille and comet Borrelly, while significantly increasing the thruster power level and making improvements in performance parameters associated with NSTAR. The EPT concept under development has a 40 cm beam diameter, twice the effective area of the Deep-Space 1 thruster, while maintaining a relatively-small volume. It incorporates mechanical features and operating conditions to maximize the design heritage established by the flight NSTAR 30 cm engine, while incorporating new technology where warranted to extend the power and throughput capability. The NASA Hall thruster program currently supports a number of tasks related to high power thruster development for a number of customers including the Energetics Program (formerly called the Space-based Program), the Space Solar Power Program, and the In-space Propulsion Program. In program year 2002, two tasks were central to the NASA Hall thruster program: 1.) the development of a laboratory Hall thruster capable of providing high thrust at high power; 2.) investigations into operation of Hall thrusters at high specific impulse. In addition to these two primary thruster development activities, there are a number of other on-going activities supported by the NASA Hall thruster program, These additional activities are related to issues such as thruster lifetime and spacecraft integration. Domonkos, Matthew T. and Patterson, Michael J. and Jankovsky, Robert S. Glenn Research Center NASA/TM-2002-211969, NAS 1.15:211969, E-13612, IMECE-2002-34444
Book Synopsis NASA 30 Cm Ion Thruster Development Status by : Michael J. Patterson
Download or read book NASA 30 Cm Ion Thruster Development Status written by Michael J. Patterson and published by . This book was released on 1995 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722204389 Total Pages :34 pages Book Rating :4.2/5 (43 download)
Book Synopsis Enhancing Space Transportation by : National Aeronautics and Space Administration (NASA)
Download or read book Enhancing Space Transportation written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-02 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Office of Aeronautics, Exploration, and Technology (OAET) supports a research and technology (R and T) program in electric propulsion to provide the basis for increased performance and life of electric thruster systems which can have a major impact on space system performance, including orbital transfer, stationkeeping, and planetary exploration. The program is oriented toward providing high-performance options that will be applicable to a broad range of near-term and far-term missions and vehicles. The program, which is being conducted through the Jet Propulsion Laboratory (JPL) and Lewis Research Center (LeRC) includes research on resistojet, arcjets, ion engines, magnetoplasmadynamic (MPD) thrusters, and electrodeless thrusters. Planning is also under way for nuclear electric propulsion (NEP) as part of the Space Exploration Initiative (SEI). Bennett, Gary L. and Watkins, Marcus A. and Byers, David C. and Barnett, John W. Glenn Research Center; Jet Propulsion Laboratory ...
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781793987747 Total Pages :40 pages Book Rating :4.9/5 (877 download)
Book Synopsis Status of Nasa's Evolutionary Xenon Thruster (Next) Long-Duration Test as of 50,000 H and 900 Kg Throughput by : National Aeronautics and Space Adm Nasa
Download or read book Status of Nasa's Evolutionary Xenon Thruster (Next) Long-Duration Test as of 50,000 H and 900 Kg Throughput written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-14 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA's Evolutionary Xenon Thruster (NEXT) project is developing the next-generation solar electric propulsion ion propulsion system with significant enhancements beyond the state-of-the-art NASA Solar Electric Propulsion Technology Application Readiness (NSTAR) ion propulsion system in order to provide future NASA science missions with enhanced propulsion capabilities. As part of a comprehensive thruster service life assessment, the NEXT Long-Duration Test (LDT) was initiated in June 2005 to demonstrate throughput capability and validate thruster service life modeling. The NEXT LDT exceeded its original qualification throughput requirement of 450 kg in December 2009. To date, the NEXT LDT has set records for electric propulsion lifetime and has demonstrated 50,170 h of operation, processed 902 kg of propellant, and delivered 34.9 MN-s of total impulse. The NEXT thruster design mitigated several life-limiting mechanisms encountered in the NSTAR design, dramatically increasing service life capability. Various component erosion rates compare favorably to the pretest predictions based upon semi-empirical ion thruster models. The NEXT LDT either met or exceeded all of its original goals regarding lifetime demonstration, performance and wear characterization, and modeling validation. In light of recent budget constraints and to focus on development of other components of the NEXT ion propulsion system, a voluntary termination procedure for the NEXT LDT began in April 2013. As part of this termination procedure, a comprehensive post-test performance characterization was conducted across all operating conditions of the NEXT throttle table. These measurements were found to be consistent with prior data that show minimal degradation of performance over the thruster's 50 kh lifetime. Repair of various diagnostics within the test facility is presently planned while keeping the thruster under high vacuum conditions. These diagnostics will provide additional critical informat
Book Synopsis Thermal Environmental Testing of NSTAR Engineering Model Ion Thrusters by :
Download or read book Thermal Environmental Testing of NSTAR Engineering Model Ion Thrusters written by and published by . This book was released on 1999 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development Status of the NASA 30-cm Ion Thruster and Power Processor by :
Download or read book Development Status of the NASA 30-cm Ion Thruster and Power Processor written by and published by . This book was released on 1994 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scaling of Ion Thrusters to Low Power by :
Download or read book Scaling of Ion Thrusters to Low Power written by and published by . This book was released on 1998 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
