The Resource Advanced ion thruster research, Paul J. Wilbur ; prepared for Lewis Research Center, National Aeronautics and Space Administration, (microform)

Advanced ion thruster research, Paul J. Wilbur ; prepared for Lewis Research Center, National Aeronautics and Space Administration, (microform)

Label
Advanced ion thruster research
Title
Advanced ion thruster research
Statement of responsibility
Paul J. Wilbur ; prepared for Lewis Research Center, National Aeronautics and Space Administration
Creator
Contributor
Subject
Language
eng
Summary
A series of experiments conducted on a ring cusp magnetic field ion thruster; in which the anode, cathode and discharge chamber backplate were moved relative to the magnetic cusp; are described. Optimum locations for the anode, cathode and backplate which yield the lowest energy cost per plasma ion and highest extracted ion fraction are identified. The results are discussed in terms of simple physical models. The results of preliminary experiments into the operation of hollow cathodes on nitrogen and xenon over a large pressure range (0.1 to 100 Torr) are presented. They show that the cathode discharge transfers from the cathode insert to the exterior edge of the orifice plate as the interelectrode pressure is increased. Experimental evidence showing that a new ion extractor grid concept can be used to stabilize the plasma sheath at the screen grid is presented. This concept, identified by the term constrained sheath optics, is shown to hold ion beamlet divergence and impingement characteristics to stable values as the beamlet current and the net and total accelerating voltages are changed. The current status of a study of beamlet vectoring induced by displacing the accelerator and/or decelerator grids of a three grid ion extraction system relative to the screen grid is discussed
Member of
Cataloging source
COD
http://library.link/vocab/creatorName
Wilbur, Paul J
Funding information
NASA grant
Government publication
federal national government publication
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • bibliography
  • technical reports
Period covered
[1 Oct. 1983-1 Nov. 1984].
http://library.link/vocab/relatedWorkOrContributorName
  • Lewis Research Center
  • Colorado State University
Series statement
NASA CR
Series volume
174862
http://library.link/vocab/subjectName
  • Ion rockets
  • Space vehicles
  • Cathodes
  • Anodes
  • Cathodes
  • Deflection
  • Divergence
  • Electric potential
  • Gas pressure
  • Hollow cathodes
  • Ion beams
  • Ion engines
  • Ion propulsion
  • Ion sheaths
  • Magnetic fields
  • Nitrogen
  • Ring discharge
  • Xenon
Type of report
Annual report;
Label
Advanced ion thruster research, Paul J. Wilbur ; prepared for Lewis Research Center, National Aeronautics and Space Administration, (microform)
Instantiates
Publication
Note
"Jan. 1985."
Base of film
safety base undetermined
Bibliography note
Includes bibliographical references (pages 57-58)
Carrier category
microfiche
Carrier category code
he
Carrier MARC source
rdacarrier
Color
black and white
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Control code
ocm276306801
Dimensions
4x6 in. or 11x15 cm.
Emulsion on film
diazo
Extent
iv, 58 pages
Form of item
microfiche
Generation
service copy
Media category
microform
Media MARC source
rdamedia
Media type code
h
Other physical details
illustrations.
Positive negative aspect
negative
http://bibfra.me/vocab/marc/reductionRatio
02
ReductionRatioRange
normal reduction
Reproduction note
Microfiche.
Specific material designation
microfiche
Stock number
N 85-19021
System control number
(Sirsi) a1067126
Label
Advanced ion thruster research, Paul J. Wilbur ; prepared for Lewis Research Center, National Aeronautics and Space Administration, (microform)
Publication
Note
"Jan. 1985."
Base of film
safety base undetermined
Bibliography note
Includes bibliographical references (pages 57-58)
Carrier category
microfiche
Carrier category code
he
Carrier MARC source
rdacarrier
Color
black and white
Content category
text
Content type code
txt
Content type MARC source
rdacontent
Control code
ocm276306801
Dimensions
4x6 in. or 11x15 cm.
Emulsion on film
diazo
Extent
iv, 58 pages
Form of item
microfiche
Generation
service copy
Media category
microform
Media MARC source
rdamedia
Media type code
h
Other physical details
illustrations.
Positive negative aspect
negative
http://bibfra.me/vocab/marc/reductionRatio
02
ReductionRatioRange
normal reduction
Reproduction note
Microfiche.
Specific material designation
microfiche
Stock number
N 85-19021
System control number
(Sirsi) a1067126

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