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Plasma flow field measurements downs...
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Colorado State University.
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Plasma flow field measurements downstream of a hollow cathode.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Plasma flow field measurements downstream of a hollow cathode./
作者:
Farnell, Casey Coffman.
面頁冊數:
131 p.
附註:
Source: Dissertation Abstracts International, Volume: 69-01, Section: B, page: 0621.
Contained By:
Dissertation Abstracts International69-01B.
標題:
Engineering, Aerospace. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3299754
ISBN:
9780549443117
Plasma flow field measurements downstream of a hollow cathode.
Farnell, Casey Coffman.
Plasma flow field measurements downstream of a hollow cathode.
- 131 p.
Source: Dissertation Abstracts International, Volume: 69-01, Section: B, page: 0621.
Thesis (Ph.D.)--Colorado State University, 2007.
The focus of the research described herein is to investigate and characterize the plasma produced downstream of a hollow cathode with the goal of identifying groups of ions and possible mechanisms of their formation within a plasma discharge that might cause erosion, especially with respect to the hollow cathode assembly. In space applications, hollow cathodes are used in electrostatic propulsion devices, especially in ion thrusters and Hall thrusters, to provide electrons to sustain the plasma discharge and neutralize the ion beam. This research is considered important based upon previous thruster life tests that have found erosion occurring on hollow cathode, keeper, and ion optics surfaces exposed to the discharge plasma. This erosion has the potential to limit the life of the thruster, especially during ambitious missions that require ultra long periods of thruster operation.
ISBN: 9780549443117Subjects--Topical Terms:
1018395
Engineering, Aerospace.
Plasma flow field measurements downstream of a hollow cathode.
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The focus of the research described herein is to investigate and characterize the plasma produced downstream of a hollow cathode with the goal of identifying groups of ions and possible mechanisms of their formation within a plasma discharge that might cause erosion, especially with respect to the hollow cathode assembly. In space applications, hollow cathodes are used in electrostatic propulsion devices, especially in ion thrusters and Hall thrusters, to provide electrons to sustain the plasma discharge and neutralize the ion beam. This research is considered important based upon previous thruster life tests that have found erosion occurring on hollow cathode, keeper, and ion optics surfaces exposed to the discharge plasma. This erosion has the potential to limit the life of the thruster, especially during ambitious missions that require ultra long periods of thruster operation.
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Results are presented from two discharge chamber configurations that produced very different plasma environments. Four types of diagnostics are described that were used to probe the plasma including an emissive probe, a triple Langmuir probe, a remotely located electrostatic analyzer (ESA), and an ExB probe attached to the ESA. In addition, a simulation model was created that correlates the measurements from the direct and remotely located probes.
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http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3299754
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