During nine months of Vesta orbit operations, the ion engine will be used to ensure a changing series of circular near-polar orbits, allowing Dawn to study the entire surface of the asteroid. Christensen Hughes Electron Dynamics, Torrance, California Prepared under Contract NAS3-27560 National Aeronautics and Space Administration Glenn Research Center November 1999. 1 Usage. ... 2000 the ion engine had accumulated 6630 hours of thrusting. It will then use ion propulsion to brake itself into a polar mapping orbit around Vesta. Ion thrusters are characterized by the electrostatic acceleration of ions extracted from a plasma source. The Deep Space mission carried out a flyby of asteroid 9969 Braille and Comet Borrelly. After the encounter with comet Borrelly, the ion engine will have operated for more than 10,000 hours. 30-cm NSTAR-type Ion Engine Single Langmuir probe measurements are presented for a two-dimensional array of locations in the near Discharge Cathode Assembly (DCA) region of a 30-cm diameter ring-cusp ion thruster over a range of thruster operating conditions encompassing the high-power half of the NASA throttling table. A five-year test of NASA's latest ion drive for future spacecraft has set a new world record for the longest single space engine test. The greater the exhaust speed, the more efficient the rocket engine. All data were analyzed assuming an electron population … 24 The ion accelerator consists of electrically biased multi-aperture grids, typically two or three, which are called ion optics.
The Dawn mission, which launched on Thursday, is equipped with NASA’s first generation of ion engines, called NSTAR.
By the time it reaches the asteroid, Dawn will have accumulated about 1,000 days … For comparison, NASA’s Dawn spacecraft used an Nstar ion engine that produced only 92 mN. The Dawn mission, which launched on Thursday, is equipped with NASA’s first generation of ion engines, called NSTAR. and the Wikipedia article subsection Dawn (spacecraft); Propulsion system says: The Dawn spacecraft was propelled by three xenon ion thrusters derived from NSTAR technology used by the Deep Space 1 spacecraft, using one at a time. Contents. ion propulsion system on DS1: 1. Propellant throughput is an approximate signature of total impulse capability.
The IX-6315 "Dawn" Electric Propulsion System is a tiny-sized engine which runs on electricity and xenon gas propellant. NSTAR Ion Thrusters and Power Processors T.A. The NSTAR ion thruster was first used on the Deep Space 1 (DS1) spacecraft, launched on 24 October 1998.
It produced 2.3 kW and was the primary propulsion for the probe. An ion thruster or ion drive is a form of electric propulsion used for spacecraft propulsion.It 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 ions.These ion thrusters rely mainly on electrostatics as ions are accelerated by the Coulomb force along an electric field. For comparison purposes, a SERT II ion engine expended about 9 kg of mercury. Both numerical values are about 3,000. It's modeled after the real-world Hall effect thruster. They have a specific impulse of 3,100 s and produce a thrust of 90 mN. NSTAR Ion Thruster: The NASA Solar Technology Application Readiness (NSTAR) program provided a single string, primary IPS to the Deep Space 1 spacecraft. Propelled by ion engines, the spacecraft achieved many firsts until its extended mission concluded on Nov. 1, 2018.
Adequate engine life—Prior to the NSTAR project, no ion engine intended for primary propulsion had ever been successfully operated for its full design life. Dawn launched in 2007 on a journey that put about 4.3 billion miles (6.9 billion kilometers) on its odometer.
By the time it reaches the asteroid, Dawn will have accumulated about 1,000 days of ion engine operation.
2. As it approaches, Dawn will conduct a survey of the region around the asteroid for any possible natural satellites, dust and debris. 1.1 Electrical vs Xenon consumption; 2 Product description; 3 Trivia; 4 Gallery; 5 Changes; 6 References; Usage. The highest orbit will be roughly 2,500 kilometers altitude, the lowest under 200 kilometers. NASA Center for Aerospace Information 7121 Standard Drive Hanover, MD 21076 Price Code: A08 Available from National Technical Information … Image right: Employing a complex commingling of solar derived electric power and xenon gas, Dawn's ion engines must fire for months at a time to propel as well as steer Dawn. Bond and J.A. The NSTAR ion engine has already demonstrated a propellant throughput in excess of 30 kg.
The 30-cm ion thruster operates over a 0.5 kW to 2.3 kW input power range providing thrust from 19 mN to 92 mN.
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