Last edited by Tygojar
Saturday, July 25, 2020 | History

3 edition of Investigation of plasma contactors for use with orbiting wires found in the catalog.

Investigation of plasma contactors for use with orbiting wires

Investigation of plasma contactors for use with orbiting wires

final report for the period 1 January 1986 through 30 June 1987

  • 393 Want to read
  • 32 Currently reading

Published by Smithsonian Institution Astrophysical Observatory, National Aeronautics and Space Administration, Lyndon B. Johnson Space Center, National Technical Information Service, distributor in Cambridge, Mass, Houston, Tex, [Springfield, Va .
Written in

    Subjects:
  • Computerized simulation.,
  • Contactors.,
  • Electrodynamics.,
  • Hollow cathodes.,
  • Plasmas (Physics),
  • Tethering.,
  • Tetherlines.

  • Edition Notes

    Statementprincipal investigator, Robert D. Estes ; co-investigators, Mario D. Grossi, Robert Hohlfeld.
    SeriesNASA contractor report -- NASA CR-181422.
    ContributionsGrossi, Mario D., Hohlfeld, Robert., Smithsonian Astrophysical Observatory., Lyndon B. Johnson Space Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17684288M

    documentation of the FUSENET WP 7 proposal “Plasma diagnostics by electrical probes”. The manual is designed to serve as a guide to students and instructors willing to learn and teach, respectively, the basic theoretical and practical principles of plasma diagnostics by electrical probes. The. review of membrane contactor designs and operations, especially in applying of contactors for removing dissolved oxygen from aqueous solutions by vacuum degassing. Keywords: membrane contactor, vacuum degassing, deoxygenating aqueous solutions, hollow fiber membranes 1. INTRODUCTION the membrane, and the dissolved oxygen from the feedFile Size: KB.

    Membrane Contactors: Fundamentals, Applications and Potentialities, Volume 11 covers new operations that could be efficiently used to improve the performance of a variety of industrial production cycles in applications ranging from biotechnology to agrofood. This book focuses on the basic "principles of work": required membrane materials and properties; major operating parameters; the Format: Paperback. Space Tethers and Elevators Les Johnson. When science fiction author Arthur C. Clarke popularized the notion of taking an elevator from the surface of the Earth into space in his novel The Fountains of Paradise (), he thrust the idea into the heads of a generation of space scientists and engineers then in primary school who now dream of rocketless transportation to space in clean.

      Satellite de-orbiting and re-entry is essential to halt the continuous increase in orbital space debris. The BETS project, which ends this month, . Choinière É. and B. Gilchrist, “Investigation of ionospheric plasma flow effects on current collection to Parallel Wires Using Self-Consistent Steady-State Kinetic Simulations, 41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, AIAA Tucson, AZ, July ,


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Investigation of plasma contactors for use with orbiting wires Download PDF EPUB FB2

Investigation of plasma contactors for use with orbiting wires - NASA/ADS The effort to determine the size and shape of the hollow cathode cloud emitted from an orbiting system was continued.

In addition, the results obtained for the ionospheric wave impedance of a tethered system was applied to the experiments under : Robert D. Estes. INVESTIGATION OF PLASMA CONTACTORS FOR USE WITH ORBITING WIRES Grant NAG Semiannual Report #2 For the period 1 July through 31 December Principal Investigator Dr.

Robert D. Estes Co-Investigators Dr. Mario D. Grossi Prof. Robert Hohlfeld June Prepared for National Aeronautics and Space Administration. Get this from a library. Investigation of plasma contactors for use with orbiting wires: final report for the period 1 January through 30 June [Robert D Estes; Mario D Grossi; Robert Hohlfeld; Smithsonian Astrophysical Observatory.; Lyndon B.

Johnson Space Center.]. AIREX: Investigation of plasma contactors for use with orbiting wires The effort to determine the size and shape of the hollow cathode cloud emitted from an orbiting system was continued.

In addition, the results obtained for the ionospheric wave impedance of a tethered system was applied to the experiments under consideration. Get this from a library. Investigation of plasma contactors for use with orbiting wires: grant NAG, semiannual report #1 for the period 1 January through 30 June [Robert D Estes; Mario D Grossi; Robert Hohlfeld; United States.

National Aeronautics and Space Administration.]. Investigation of plasma contactors for use with orbiting wires. By Robert D. Estes. Abstract. The results of a number of orbital simulations for a km orbital height and 28 degrees orbital inclination are included to emphasize the importance of the choice of the timing of the experiments.

The bulk of the effort has gone into trying to Author: Robert D. Estes. A critical property for hollow cathode effectiveness as a plasma contactor is the cross magnetic field conductivity of the emitted plasma. The different effects of hollow cathode cloud overlap in the cases of motion-driven and battery-driven operation are emphasized.

INVESTIGATION OF PLASMA CONTACTORS FOR USE WITH ORBITING WIRES Grant NAG Final Report For the period 1 January through 30 June Principal Investigator Dr. Robert D. Estes Co-Investigators Dr. Mario D. Grossi Prof. Robert Hohlfeld September The effect of a plasma velocity could play a role for a tether orbiting in the F layer, where O is the dominant ion species and the ion (ram) energy is large as compared with the thermal energy.

Plasma contactors for use with electrodynamic tethers for power generation Acta Astronautica, Vol. 17, No. 8 Hollow cathodes as electron emitting plasma contactors - Theory and computer modelingCited by: Investigation of plasma contactors for use with orbiting wires [microform]: final report for the period Investigation of plasma contactors for use with orbiting wires [microform]: grant NAG, semiannual Investigation of plasma contactors for use with orbiting wires [microform]: semiannual report #2 for th.

SATELLITE DE-ORBITING BY MEANS OF ELECTRODYNAMIC TETHERS PART II: SYSTEM CONFIGURATION AND PERFORMANCE Probably the most important use is related to orbiting upper stages and satellite constellations, because the device acts essentially as a plasma contactor clamping the lower termination to a potential close to the plasma by: The Swedish small satellite program for space plasma investigations The Mars Orbiting Plasma Surveyor (MOPS) A Pre-Phase A Technical Study, Swedish Space Corporation Jan Spacecraft and satellites orbiting the Earth are exposed to the electrostatic environments of the Earth's atmosphere.

There are three main orbital regions around the Earth: low Earth orbit (LEO), medium Earth orbit (MEO), and geosynchronous Earth orbit (GEO). LEO. The mechanical power dissipated by the drag force can be related to the electrical power on the basis of energy conservation: (5) P=Fv=Φ ind 2 /R tot.

This power corresponds also to the rate of change of the orbital energy: (6) P=− d E/ d t. The energy can in turn be expressed as (7) E=−1/2(GM m tot /a), where G is the gravitational constant (G=×10 −11 N m 2 / kg 2), M is the mass Cited by: The plasma properties and electron emission characteristics of near-zero differential resistance of hollow cathode-based plasma contactors with a discharge chamber Physics of Plasmas, Vol.

21, No. 8 Direct Vlasov simulations of electron-attracting cylindrical Langmuir probes in flowing plasmasCited by: only the radiation from embedded atoms. Therefore, we must use indirect evidence to deduce plasma properties, like density, temperature and motion.

Each time my students have grasped the principle of a plasma process, I ask what we can learn about the plasma by studying this process.

In preparing this book, I have been supported by many Size: 5MB. Plasma Treatment of Wire Insulation Materials Tri-Star Technologies Rosecrans Ave, El Segundo, CA Tel: Fax: @   A space tether is a kilometer long wire connecting two satellites.

Assuming that the tether remains vertical in a circular orbit, and its mass is small compared with end masses m 1 and m 2 at the bottom and the top, the common rotation velocity ω orb, in the absence of any other force, is determined by the overall balance of gravitational and centrifugal forces in the orbiting frame.

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A contactor is also a type of relay. Although they have been explained in earlier posts, their wide use and significance needs to be explained in detail.

Features of Contactors. A contactor is a relay that is used for switching power. They usually handle very heavy loads like an electric motor, lighting and heating equipments and so on.Plasma contactor. From Wikipedia, the free encyclopedia.

(Redirected from Plasma Contactor) Jump to navigation Jump to search. Plasma contactors are devices used on spacecraft in order to prevent accumulation of electrostatic charge through the expulsion of plasma (often Xenon). An electrical contactor is an electrically controlled switch which closes a power or high voltage electrical circuit.Plasma contactors 3 The TSS-1R experiment and the subsequent tether failure The experiment Events before and after the tether break The significance of the events surrounding the break The hollow-cathode plasma contactor as a starting point 4 Analysis of the hollow cathode conceptFile Size: 2MB.