2 edition of Titanium optics for ion thrusters found in the catalog.
Titanium optics for ion thrusters
by National Aeronautics and Space Administration, Glenn Research Center, National Technical Information Service, distributor in [Cleveland, Ohio], [Springfield, Va
Written in English
|Statement||George C. Soulas ... [et al.].|
|Series||[NASA technical memorandum] -- NASA/TM-1999-209650., NASA technical memorandum -- 209650.|
|Contributions||Soulas, George C., NASA Glenn Research Center.|
|The Physical Object|
Titanium nitride and/or nitrogen ion implanted coated dental materials have been investigated since the mids and considered in various applications in dentistry such as implants, abutments, orthodontic wires, endodontic files, periodontal/oral hygiene instruments, and casting alloys for fixed restorations. Multiple methodologies have been employed to create the Cited by: A very brief introduction to Ion Thrusters. Solo Survival: How to Survive Alone in the Wilderness for 1 week --Eastern Woodlands - Duration: Tom McElroy-Wild Survival Recommended for you.
The main parts of ion thrusters are ion optics and the keeper, with optics playing a main role in the geometry of the engine. Their erosion, however, is what restricts the longevity of ion thrusters. Colorado State University Electric Propulsion & Plasma Engineering (CEPPE) Laboratory. The CEPPE Laboratory researches ion and hall thrusters, plasma propulsion technologies, and spacecraft propulsion systems as well as other applications of plasma technology including hydroxyapatite thin films, erosion and sputtering problems, ion optics, and computational .
Ion engines produce very little thrust, so in order to reach speeds of km/s they must accelerate continuously for months or years. The Dawn spacecraft, for example, was built with three redundant ion thrusters to extend its lifetime, and got nowhere near km/s; it carried enough propellant to change its speed by about 10km/s, and took. Performance Evaluation of Titanium Ion Optics for the NASA 30 cm Ion Thruster IEPC Carbon-based Ion Optics Development at NASA GRC: IEPC Status of Ion Engine Development for High Power, High Specific Impulse Missions: IEPC
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The sections thereafter describe the process used to select titanium. Material properties are also examined to determine if titanium could be fabricated, operated, and would survive launch loads. Optics Design and Fabrication Process The NSTAR 30 cm ion thruster uses two grids made of perforated, domed molybdenum.
Titanium optics for ion thrusters (OCoLC) Material Titanium optics for ion thrusters book Government publication, National government publication: Document Type: Book: All Authors / Contributors: George C Soulas; NASA Glenn Research Center.
A titanium grid set was mounted onto an NSTAR 30 cm engineering model ion thruster and tested to determine optics performance. The titanium optics operated successfully over the entire NSTAR power. Titanium optics for ion thrusters (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors: George C.
While steel, titanium and aluminum parts are selectively laser melted for different industries [21, 22], metals like molybdenum, which is an option for ion engine components such as ion optics, hollow cathode keepers and Hall thruster anodes, have not been fabricated through this : Ning Guo, Kan Xie, Miguel Sangregorio, Ningfei Wang, Zun Zhang, Stephen B.
Gabriel. performance of titanium optics on a nasa 30 cm ion thruster George C. Soulas, John E. Foster, and Michael J. Patterson National Aeronautics and Space Administration.
voltages for titanium ion optics were up to 55 V greater than those for molybdenum ion optics. Comparisons of electron backstreaming limits as a function of peak beam current density for molybdenum and titanium ion optics demonstrated that titanium ion optics operated with a higher electron backstreaming limit than molybdenum ion optics for a given peak beam Author: George C.
Soulas. Performance of titanium optics on a NASA 30 cm ion thruster. George Soulas, John Foster and Michael Patterson. The first systematic analysis of electric propulsion systems was made by Ernst Stuhlinger  in his book Ion Propulsion for Space Flight, publishedinand the physics of electric propulsion thrusters was first described comprehensively in a book by Robert Jahn  in A real ion thruster used on satellites.
While it may sound like something that Captain Kirk asks Sulu to set to maximum, an ion thruster is not science fiction but actually a working technology.
Dan M. Goebel, PhD, is a Senior Research Scientist in the Advanced Propulsion Technology Group at JPL in Pasadena, California. Since joining JPL inhe has worked on the development of high-efficiency ion thrusters, advanced long life cathodes and grids, and electric-thruster life models for deep space by: Afterwards, performance characterizations were conducted.
This permitted proper performance comparisons of titanium and molybdenum ion optics. Ion optics' performance A,as characterized over a broad thruster input power range of to kW. All performance parameters for titanium ion optics of achieved steady state values after processing Author: George C.
Soulas. 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 t hours during a period of over 2 years.
The ion thrusters being developed now are being designed to operate for 7 to 10 years. Performance measurements, such as perveance, electron backstreaming limit and screen grid ion transparency, were also made to confirm that this ion optics assembly performed similarly to past testing.
Results are compared to a prior test of 30 cm titanium ion by: 7. 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).
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 : Alexander Reifsnyder. Lithium-Ion Batteries also explores the concepts of nanostructured materials, as well as the importance of battery management systems.
This handbook is an invaluable resource for electrochemical engineers and battery and fuel cell experts everywhere, from research institutions and universities to a worldwide array of professional industries.
High operation temperatures in ion thrusters with metallic ion optics lead to unequal thermal expansion of screen and accelerator grids. Larger normal and tangential displacements of the screen grid result in grid-to-grid gap change and aperture misalignment, which affects the perveance of the optics and modifies ion : Miguel Sangregorio, Kan Xie, Ningfei Wang, Zun Zhang.
Sections 4 Ion optics of significant thrusters, 5 Extraction system configurations and potential profile, 6 Grids’ thickness, apertures and gaps focus on the geometric parameters (D, ts, ta, td, ds, da, dd, lsa, lad) of significant ion engine grids and Section 5 Cited by: 4.
Ion thruster. 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.
NASA’s Evolutionary Xenon Thruster (NEXT) is a gridded-ion thruster. 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.
Each set of electrodes, called ion optics or grids, contains thousands of coaxial apertures.Full text of "Ion and Electron Transport in an NSTAR-Derivative Ion Thruster" See other formats NASA/TM— /REVl Ion and Electron Transport in an NSTAR-Derivative Ion Thruster JohnE.
Foster Glenn Research Center, Cleveland, Ohio June The NASA STI Program Office in Profile Since its founding, NASA has been dedicated to the advancement of .NASA’s New Ion Thruster Breaks Records, Could Take Humans to Mars Capable of record-breaking speeds and highly efficient, the X3 Hall thruster is .