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Sunday, February 9, 2020 | History

3 edition of Closed-drift thruster investigations found in the catalog.

Closed-drift thruster investigations

Closed-drift thruster investigations

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Published by Dept. of Physics, Colorado State University, Lewis Research Center, National Aeronautics and Space Administration, National Technical Information Service, distributor in Fort Collins, Colo, [Cleveland, Ohio], [Springfield, Va .
Written in English

    Subjects:
  • Engine design.,
  • Hall effect.,
  • Ion engines.,
  • Ion propulsion.,
  • Plasma engines.

  • Edition Notes

    Other titlesClosed drift thruster investigations.
    StatementRaymond S. Robinson, Terry D. Schemmel, and Michael J. Patterson.
    SeriesNASA contractor report -- NASA CR-179497.
    ContributionsSchemmel, Terry D., Patterson, Michael J., 1955-, Lewis Research Center.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL15408332M

    Figure 5. Thus microwaves have long been considered the ideal source. Such flooding would have been a significant sonic event, and no evidence of that can be found in the recorded data. The photograph with bright light near the channel exit right indicates that the discharge region was pushed outside the ceramic channel, as expected in the WL configuration. Komurasaki and Y.

    CrossRef Google Scholar 2. The inability to blow Closed-drift thruster investigations book ballast tanks was later attributed to excessive moisture in the submarine's high-pressure air flasks, moisture which froze and plugged the flasks' flowpaths while passing through the valves. The temperature of the walls remains relatively low, since the resulting power deposition on this structure is minimal. However, if the thruster adopts a traditional anode configuration and anode location, it will experience a drop in its performance, as this configuration may cause an inadequate homogenization of neutral gas. Figure 12 shows a picture of the W prototype Hall thruster and plume discharge with titanium wall material [ 31 ].

    JPL Navy and remains on "Eternal Patrol". Normal procedure was to drive the submarine to periscope depth, raise the periscope to verify the area was clear, then blow the tanks and surface the submarine. Primary ionization Closed-drift thruster investigations book be maintained inside the channel, and the primary acceleration can be directed toward the plume region, which can maintain a high level of propellant utilization while decreasing the energy, flux of electrons, and the ions that bombard the ceramic channel wall. The microwave-plasma electrothermal rocket MWPETR shows promise for spacecraft propulsion and maneuvering, without some of the drawbacks of competitive electric propulsion systems. An improved Hall thruster based on PPS-Flex, which is capable of forming a stronger magnetic field intensity, is currently under development.


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Closed-drift thruster investigations Download PDF Ebook

High-power thrusters which operate at 1. This thesis is an experimental investigation of the physical and chemical properties of a hydrogen discharge in a flowing microwave plasma system. Maslennikov, and A. Magnetic structure and configuration. The inability to blow the ballast tanks was later attributed to excessive moisture in the submarine's high-pressure air flasks, moisture which froze and plugged the flasks' flowpaths while passing through the valves.

Considered as a whole, the publications on closed drift thrusters constitute an impressive body of information that, for Closed-drift thruster investigations book most part, was generated in Russia independently of US research on electric thrusters.

Several hours later, the backup generator broke down Closed-drift thruster investigations book the electrical load was transferred to the ship's battery.

A distinct difference between the two Closed-drift thruster investigations book is that the boundary of the ion beam with WL configuration is less distinct, which means that the divergence angle of the plume region in a wall-less configuration is much larger.

In addition, the reduction of the plasma-wall interaction can lead to higher electron temperatures and positive points, which should result in efficient ionization of the propellants such as krypton and argon. Figure 5.

The underlying cause of this problem is channel wall erosion caused by the bombardment of high-energy electrons and ions. Thus microwaves have long been considered the ideal source. Janes and R. Naval nuclear-powered craft. The other is that the ionization and acceleration region are too short for effective electron-atom collision.

It found and photographed major sections of Thresher, including the sailsonar dome, bow section, engineering spaces section, operations spaces section, and the stern planes. Second, the gas distributor and the anode are made of nonmagnetic stainless steel, while the other metal structures of the thruster are made of titanium.

In addition, due to its shorter ionization region and relatively shorter channel, it also has a poor overall performance compared to that of the hollow anode [ 28 ]. In addition, JPL also applied a magnetic shielding technique to a miniature Hall thruster.

This significantly impacts the operation at high voltage, and further optimization is necessary to reduce discharge current oscillations and increase the thruster efficiency.

Kaufman, K. The concept was then proposed based on the idea of a Hall thruster, with an external electric field. To facilitate more effective and uniform distribution of the xenon gas, a 3-mm-thick gridded anode which covers the channel exit was designed, as shown in Figure 4.

The captain, returning to the ship from a shore function, arrived just after the battery ran down. Having been "lost at sea", Thresher was not decommissioned by the U. Navy has periodically monitored the environmental conditions of the site since the sinking and has reported the results in an annual public report on environmental monitoring for U.

She remained submerged overnight and re-established underwater communications with Skylark at on 10 April to commence deep-dive trials.Throughout most of the twentieth century, electric propulsion was considered the technology of the future.

The criterion of optimal configuration of magnetic field in a thruster with closed electron drift

Now, the future has arrived. This important new Closed-drift thruster investigations 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.5/5(1).

Design and Experimental Investigation of a Small Closed Drift Thruster A.I. Bugrova,a A.D. Desiatskov,a H.R. Kaufman,b V.K. Kharchevnikov,a A.I. Morozov,c and V.V. Zhurind aMoscow Institute of Radioelectronics, Moscow, Russia bFront Range Research, Fort Collins, Colorado cKurchatov's Russian Research Center, Moscow, Russia dFront Range Fakel, Fort Collins.

May 23,  · Electric Thruster Capabilities for Orbit-Raising and Maneuvering Missions Orbit-Raising and Maneuvering Propulsion: Research Status and Needs August Scale effects on solid propellant MPD thruster performanceCited by: Jul 30,  · The criterion of optimal configuration pdf magnetic field in a thruster with closed electron drift The pdf investigation of the effect of magnetic field structure on the efficiency and specific impulse of plasma thruster revealed correlation between the results of application of the criterion and the parameters of efficiency of the Cited by: 6.Design and Experimental Investigation of a Small Closed Drift Thruster A.I.

Bugrova,a A.D. Desiatskov,a H.R. Kaufman,b V.K. Kharchevnikov,a A.I.

Ion Source Design for Industrial Applications

Morozov,c and V.V. Zhurind aMoscow Institute of Radioelectronics, Moscow, Russia bFront Range Research, Fort Collins, Colorado cKurchatov's Russian Research Center, Moscow, Russia dFront Range Fakel, Fort Collins.

EXPERIMENTAL INVESTIGATION OF HALL Ebook INTERNAL MAGNETIC FIELD TOPOGRAPHY Peter Y. Peterson, Alec D. Gallimore, and James M. Haas Plasmadynamics and Electric Propulsion Laboratory University of Michi gan Ann Arbor, MI 37th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit 8—11 July Salt Lake City, UtahCited by: 1.