3 edition of Ion beamlet steering for two-grid electrostatic thrusters found in the catalog.
Ion beamlet steering for two-grid electrostatic thrusters
by Dept. of Mechanical Engineering, Colorado State University, For sale by the National Technical Information Service in Fort Collins, Colo, [Springfield, Va
Written in English
|Statement||by John M. Homa|
|Series||NASA CR -- 174671, NASA contractor report -- 174671|
|Contributions||Colorado State University. Dept. of Mechanical Engineering, Lewis Research Center|
|The Physical Object|
implications of these findings for future gridded ion thruster developments and future missions will be addressed. DUAL-STAGE 4-GRID (DS4G) CONCEPT Electrostatic grid systems used in conventional state-of-the-art ion thrusters perform ion extraction & acceleration simultaneously in . Ion Propulsion NASA Facts National Aeronautics and Space Administration Glenn Research Center Cleveland, Ohio – FS––11––GRC In an ion thruster, ions are accelerated by electrostatic forces. The electric fields used for acceleration are generated by electrodes positioned at the downstream end of the thruster.
April 6, The ion propulsion system on Deep Space 1 is the culmination of over 50 years of development on electric engine systems in abcdfestivalgoa.comed on Oct. 24, , Deep Space 1 will be the first spacecraft to actually use ion propulsion to reach another planetary body. Oct 02, · OVERVIEW OF HALL THRUSTERS: Hall thrusters are a gridless type of ion thruster that expels ions to create thrust. They provide higher thrust than other types of ion propulsion. What Is an Ion? An ion is simply an atom or molecule that is electrically charged. Ionization is the process of electrically charging an atom or molecule by adding.
A second type of electrostatic propulsion system is the Hall Effect thruster. Considered as both electrostatic and electromagnetic propulsion systems (European Space Agency, ), Hall Effect thrusters contain both a radial magnetic field and an axial electric current, which interact to provide propulsion to the system (Jahn & Choueiri, ). An ion thruster or ion drive is a form of electric propulsion used for spacecraft abcdfestivalgoa.com creates thrust by accelerating ions using electricity.. An ion thruster ionizes a neutral gas by extracting some electrons out of atoms, creating a cloud of positive abcdfestivalgoa.com ion thrusters rely mainly on electrostatics as ions are accelerated by the Coulomb force along an electric field.
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Get this from a library. Ion beamlet steering for two-grid electrostatic thrusters. [John M Homa; Colorado State University. Department of Mechanical Engineering.; Lewis Research Center.]. beamlet steering has been investigated for many years in both ion sources and ion thrusters [22–25].
The beamlet is steered in the direction opposite to that of the aperture displacement due to the higher focusing electric field induced at the accel grid aperture edge.
Studies of this effect in ion thruster grid. ION BEAMLET STEERING FOR TWO-GRID ELECTROSTATIC THRUSTERS PREPARED FOR LEWIS RESEARCH CENTER NATIONAL AERONAUTICS AND SPACE ADMINISTRATION GRANT NGRll2 by John M.
Homa Approved by Paul J. Wilbur July Department of Mechanical Engineeri Colorado State University Fort Collins, Colorado abcdfestivalgoa.com CIBPY.
Can Ion Thrusters work in Earth's Atmosphere. Electrostatic ion thrusters Asked in Authors, John M Homa has written: 'Ion beamlet steering for two-grid electrostatic thrusters' -- subject.
An experimental study of ion beamlet steering in which the direction of beamlets emitted from a two grid aperture system is controlled by relative translation of the grids, is described.
The results can be used to design electrostatic accelerating devices for which the direction and focus of emerging beamlets are abcdfestivalgoa.com: J.
Homa. Plasma particle simulation of electrostatic ion thrusters. Ion beamlet divergence characteristics of two-grid multiple-hole ion-accelerator systems. Impingement-current erosion characteristics of accelerator grids on two-grid thrusters. Timothy Barker and Author: G.
Aston, H. Kaufman, P. Wilbur. Ion beam divergence characteristics of two-grid accelerator systems. Plasma particle simulation of electrostatic ion thrusters. Xiaohang Peng, Ion Beamlet Divergence Characteristics of Two-Grid Multiple-Hole Ion-Accelerator Systems. Yukio Hayakawa and Cited by: The thruster ion optics assembly serves three main purposes 1: (A) extract ions from the discharge chamber, (B) accelerate ions to generate thrust and (C) prevent the backstreaming of the electrons from the neutralizer hollow cathode.
Fig. 1 shows the main parts of a Kaufman type ion thruster with a two-grid extraction abcdfestivalgoa.com by: 3. 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.5/5(1). The ion thruster then processes the propellant and power to propel the spacecraft.
The first ion thrusters did not last very long, but the ion thruster on Deep Space 1 exceeded expectations and was used more than 16, hours during a period of over 2 years. The ion thrusters being developed now are being designed to operate for 7 to 10 years. Sep 09, · A gridded ion thruster uses electrical energy to create, accelerate and neutralize positively charged ions to generate thrust.
The discharge. Fundamentals of Electric Propulsion: Ion and Hall Thrusters [Dan M. Goebel, Ira Katz] on abcdfestivalgoa.com *FREE* shipping on qualifying offers.
Throughout most of the twentieth century, electric propulsion was considered the technology of the future. NowCited by: Apr 24, · A very brief introduction to Ion Thrusters. Loading and moving the World's largest hydrostatic bulldozer, the Liebherr PR - Duration: Awesome Earthmovers Recommended for you.
Session Electrostatic Thrusters (Kaufman Ion Engines) Electrostatic thrusters (“ion engines”) are the best developed type of electric propulsion de vice, dating in conception to the ’s, and having been demonstrated in space in on a suborbital ﬂight of the SERT I spacecraft. The early history and concepts are well doc.
Particle Simulation of Three-Grid ECR Ion Thruster Optics and Erosion Prediction. thruster is a type of electrostatic thruster, developed Particle Simulation of Three-Grid ECR Ion Thruster.
The gridded ion thruster is a common design for ion thrusters, a highly efficient low-thrust spacecraft propulsion running on electrical power.
These designs use high-voltage grid electrodes to accelerate ions with electrostatic forces. Design of an ion thruster movable grid thrust vectoring system.
The resulting change in electrostatic field between the grids causes ions to change The actuation system is responsible for moving and positioning the grid in the plane perpendicular to the thruster axis. Two grid suspension designs and three types of actuators were Cited by: 8.
AE Rocket Propulsion Electrostatic Thrusters • Thrust provided by “static” electric field in the direction of the acceleration • Propellant is often an ionized gas – so often denoted ion thruster • Typically operate at low pressure (near vacuum) • Handful of different technologies – gridded ion thruster or ion engine.
Aug 27, · An ion thruster produces a flow of air even though it has no moving parts. A version of this seemingly impossible device is used on a larger scale to propel deep space probes for NASA.
The advantage to this system over others is that you need only an electrical source to power the device and it has no moving parts so it is almost abcdfestivalgoa.com: Alexander Reifsnyder. Particle Simulation of Three-Grid ECR Ion Thruster Optics and ion thruster is a type of electrostatic thruster, developed CEX-3D code for two-grid ion optics .
Dec 28, · NASA’s NEXT ion drive breaks world record, will eventually power interplanetary missions; will eventually power interplanetary missions. A diagram of an electrostatic ion thruster .Chapter 2 Thruster Principles In contrast, an ion thruster with a km/s exhaust velocity, corresponding to an Isp of s, would accomplish the same mission Therefore, the thrust in an ion engine is transferred by the electrostatic force between the ions and the two grids.Jul 31, · Plasmas for spacecraft propulsion.
The beam parameters are strongly coupled in the two grid configurations and adequate extraction is achieved for a limited beam energy range.
Schematic of the 3 grid extraction system in an ion gridded thruster showing one ion beamlet and the corresponding axial potential profile (not to scale).