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Author : Robert Francis Eckman
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.:/5 (412 download)
Download or read book Langmuir Probe Measurements in the Plume of a Pulsed Plasma Thruster written by Robert Francis Eckman and published by . This book was released on 1999 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Lawrence Thomas Byrne
Publisher :
ISBN 13 :
Total Pages : 102 pages
Book Rating : 4.:/5 (518 download)
Download or read book Langmuir Probe Measurements in the Plume of a Pulsed Plasma Thruster written by Lawrence Thomas Byrne and published by . This book was released on 2002 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Eckman
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Triple Langmuir Probe Measurements in the Plume of a Pulsed Plasma Thruster written by Robert Eckman and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Eckman
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Analysis of Triple Langmuir Probe Measurements in the Plume of a Pulsed Plasma Thruster written by Robert Eckman and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : L. Byrne
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Pulsed Plasma Thruster Plume Measurements Using a Triple Langmuir Probe Method written by L. Byrne and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : L. Byrne
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Triple Langmuir Probe Measurements in the Plume and Backflow Region of a Pulsed Plasma Thruster written by L. Byrne and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jurg C. Zwahlen
Publisher :
ISBN 13 :
Total Pages : 71 pages
Book Rating : 4.:/5 (519 download)
Download or read book Investigation Or a Pulsed Plasma Thruster Plume Using a Quadruple Langmuir Probe Technique written by Jurg C. Zwahlen and published by . This book was released on 2003 with total page 71 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : N. A. Gatsonis
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Characterization of a Pulsed Plasma Thruster Plume Using a Quadruple Langmuir Probe Method written by N. A. Gatsonis and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (317 download)
Download or read book Stationary Plasma Thruster Plume Characteristics written by and published by . This book was released on 1994 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Rohit Shastry
Publisher : BiblioGov
ISBN 13 : 9781289113049
Total Pages : 22 pages
Book Rating : 4.1/5 (13 download)
Download or read book Plasma Potential and Langmuir Probe Measurements in the Near-Field Plume of the Nasa-457mv2 Hall Thruster written by Rohit Shastry and published by BiblioGov. This book was released on 2013-06 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Technical Reports Servcr (NTRS) houses half a million publications that are a valuable means of information to researchers, teachers, students, and the general public. These documents are all aerospace related with much scientific and technical information created or funded by NASA. Some types of documents include conference papers, research reports, meeting papers, journal articles and more. This is one of those documents.
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781721235506
Total Pages : 38 pages
Book Rating : 4.2/5 (355 download)
Download or read book Plume and Discharge Plasma Measurements of an Nstar-Type Ion Thruster written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-16 with total page 38 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
Author : Daniel A. Herman
Publisher : BiblioGov
ISBN 13 : 9781289018184
Total Pages : 22 pages
Book Rating : 4.0/5 (181 download)
Download or read book Plasma Potential and Langmuir Probe Measurements in the Near-Field Plume of the Nasa 300m Hall Thruster written by Daniel A. Herman and published by BiblioGov. This book was released on 2013-06 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to aid in the design of high-power Hall thrusters and provide experimental validation for existing modeling efforts, plasma potential and Langmuir probe measurements were performed in the near-field plume of the NASA 300M Hall thruster. A probe array consisting of a Faraday probe, Langmuir probe, and emissive probe was used to interrogate the plume from approximately 0.1 - 2.0 DT, m downstream of the thruster exit plane at four operating conditions: 300 V, 400 V, and 500 V at 20 kW as well as 300 V at 10 kW. Results show that the acceleration zone and high-temperature region were contained within 0.3 DT, m from the exit plane at all operating conditions. Isothermal lines were shown to strongly follow magnetic field lines in the nearfield, with maximum temperatures ranging from 19 - 27 eV. The electron temperature spatial distribution created large drops in measured floating potentials in front of the magnetic pole surfaces where the plasma density was small, which suggests strong sheaths at these surfaces. The data taken have provided valuable information for future design and modeling validation, and complements ongoing internal measurement efforts on the NASA 300
Author : Dominic J. Palumbo
Publisher :
ISBN 13 :
Total Pages : 37 pages
Book Rating : 4.:/5 (227 download)
Download or read book Experimental and Theoretical Analysis of Pulsed Plasma Exhaust Plumes written by Dominic J. Palumbo and published by . This book was released on 1978 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pulsed plasma plume diagnostic studies performed in the past have shown that considerable uncertainty exists because of the degree of backscatter encountered in ground test facilities. The large level of backscatter is attributable to the extremely high mass expulsion rate characteristic of solid propellant pulsed plasma thrusters (30 to 40 g/s on the average). The study reported upon herein had the objective of obtaining a suitable analytic model and computational scheme for calculation of the plume characteristics of a 23 mN-s pulsed plasma thruster. The calculated results were compared to experimental measurements of electron number density and temperature, obtained using specially designed Langmuir probes, only up to the point in the time when backscatter of plume effluents off the vacuum chamber walls became significant. A secondary objective of the program was to design a suitable driver circuit for the Langmuir Sangmuir probes so that a voltage ramp could be pulsed for one microsecond at any given time subsequent to thruster discharge initiation and the volt-ampere characteristic could be displayed on an XY oscilloscope.
Author : Jeremiah Daniel Hanna
Publisher :
ISBN 13 :
Total Pages : 103 pages
Book Rating : 4.:/5 (116 download)
Download or read book Liquid Pulsed Plasma Thruster Plasma Plume Investigation and MR-SAT Cold Gas Propulsion System Performance Analysis written by Jeremiah Daniel Hanna and published by . This book was released on 2017 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The plasma plume produced by a liquid pulsed plasma thruster is investigated using a Langmuir triple probe and a nude Faraday probe. The Langmuir triple probe failed to produce results which are suspected caused by the presence of ionic liquid in the plume resulting in shorting of the probe. The nude Faraday probe is able to record the ion current density which revealed a high level of inconsistency in the plasma plume. Ion current density recorded by the nude Faraday probe had a relative standard deviation of upwards of 100% of the mean value. Controlling the amount of propellant used during each pulse was extremely difficult. Investigating the plasma plume with more complex probes was not done due to the inconsistency measured by the nude Faraday probe and the expulsion of ionic liquid from the thruster which is highly corrosive to metals. Examining the historical thrust test data performed by the Missouri Satellite Research Team, a revised model with new assumptions was created and resulted in an improvement in accuracy to within 4.5%. The cold gas propulsion system developed over the years had undergone testing which resulted in measured thrust half of what was predicted. Developing a thrust prediction scheme that incorporates the effects of the solenoid control valve decreases the error to between 1-3% depending on temperature considerations. This thrust prediction scheme can be applied to the current design for the NanoSat 8 competition and results in an accurate prediction of thrust"--Abstract, page iii.
Author : Yassir Azziz
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (544 download)
Download or read book Instrument Development and Plasma Measurements on a 200-watt Hall Thruster Plume written by Yassir Azziz and published by . This book was released on 2003 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : National Aeronautics and Space Administration (NASA)
Publisher : Createspace Independent Publishing Platform
ISBN 13 : 9781720663096
Total Pages : 28 pages
Book Rating : 4.6/5 (63 download)
Download or read book Plasma Characteristics Measured in the Plume of a Next Multi-Thruster Array written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-03 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plasma properties in the plume produced by a 3+1 NEXT thruster array operating at full power were mapped using a series of planar Langmuir probes. The Langmuir probes were swept across the diameters of each thruster as well as the centerline of the array at multiple downstream axial locations to produce a plasma map of the plume produced by the array. Such maps yielded the spatial distribution of the plasma density, the electron temperature and the plasma potential in the near field of the array. This spatial information provides insight into local plasma particle flow. Flow direction is particularly important from both an array lifetime and spacecraft-plume plasma interaction standpoint. The variation in the plume plasma parameters tended to vary in a manner consistent with both plume shape and overlap of adjacent plumes.Foster, John E. and Patterson, Michael and Pencil, Eric and McEwen, Heather and Diaz, EstherGlenn Research CenterPLUMES; PLASMAS (PHYSICS); THRUSTORS; PLASMA POTENTIALS; ELECTROSTATIC PROBES; SPATIAL DISTRIBUTION; ELECTRON ENERGY; PLASMA DENSITY; NEAR FIELDS
Author : J.Z. Ma
Publisher : Trans Tech Publications Ltd
ISBN 13 : 3038261653
Total Pages : 3960 pages
Book Rating : 4.0/5 (382 download)
Download or read book Instruments, Measurement, Electronics and Information Engineering written by J.Z. Ma and published by Trans Tech Publications Ltd. This book was released on 2013-08-08 with total page 3960 pages. Available in PDF, EPUB and Kindle. Book excerpt: Collection of selected, peer reviewed papers from the 2013 International Conference on Precision Mechanical Instruments and Measurement Technology (ICPMIMT 2013), May 25-26, 2013, Shenyang, Liaoning, China. The 804 papers are grouped as follows: Chapter 1: Mechatronics, Control and Management, Measurement and Instrumentation, Monitoring Technologies; Chapter 2: Materials Science and Manufacturing Engineering; Chapter 3: Power Systems, Electronics and Microelectronics, Embedded and Integrated Systems, Communication; Chapter 4: Computational Methods and Algorithms, Applied Information Technologies.
