Magnetic Field Effects on the Plume of a Diverging Cusped-Field Thruster

Handle URI:
http://hdl.handle.net/10754/594719
Title:
Magnetic Field Effects on the Plume of a Diverging Cusped-Field Thruster
Authors:
Matlock, Taylor; Gildea, Stephen; Hu, Fuzhou; Becker, Nicholas Michael; Lozano, Paulo; Martinez-Sanchez, Manuel
Abstract:
The Diverging Cusped-Field Thruster (DCFT) uses three permanent ring magnets of alternating polarity to create a unique magnetic topology intended to reduce plasma losses to the discharge chamber surfaces. The magnetic field strength within the DCFT discharge chamber (up to 4 kG on axis) is much higher than in thrusters of similar geometry, which is believed to be a driving factor in the high measured anode efficiencies. The field strength in the near plume region is large as well, which may bear on the high beam divergences measured, with peaks in ion current found at angles of around 30-35 from the thruster axis. Characterization of the DCFT has heretofore involved only one magnetic topology. It is then the purpose of this study to investigate changes to the near-field plume caused by altering the shape and strength of the magnetic field. A thick magnetic collar, encircling the thruster body, is used to lower the field strength outside of the discharge chamber and thus lessen any effects caused by the external field. Changes in the thruster plume with field topology are monitored by the use of normal Langmuir and emissive probes interrogating the near-field plasma. Results are related to other observations that suggest a unified conceptual framework for the important near-exit region of the thruster.
KAUST Department:
Electrical Engineering Program
Publisher:
American Institute of Aeronautics and Astronautics (AIAA)
Journal:
46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit
Conference/Event name:
46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit
Issue Date:
25-Jul-2010
DOI:
10.2514/6.2010-7104
Type:
Conference Paper
Additional Links:
http://arc.aiaa.org/doi/abs/10.2514/6.2010-7104
Appears in Collections:
Conference Papers; Electrical Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorMatlock, Tayloren
dc.contributor.authorGildea, Stephenen
dc.contributor.authorHu, Fuzhouen
dc.contributor.authorBecker, Nicholas Michaelen
dc.contributor.authorLozano, Pauloen
dc.contributor.authorMartinez-Sanchez, Manuelen
dc.date.accessioned2016-01-24T07:37:06Zen
dc.date.available2016-01-24T07:37:06Zen
dc.date.issued2010-07-25en
dc.identifier.doi10.2514/6.2010-7104en
dc.identifier.urihttp://hdl.handle.net/10754/594719en
dc.description.abstractThe Diverging Cusped-Field Thruster (DCFT) uses three permanent ring magnets of alternating polarity to create a unique magnetic topology intended to reduce plasma losses to the discharge chamber surfaces. The magnetic field strength within the DCFT discharge chamber (up to 4 kG on axis) is much higher than in thrusters of similar geometry, which is believed to be a driving factor in the high measured anode efficiencies. The field strength in the near plume region is large as well, which may bear on the high beam divergences measured, with peaks in ion current found at angles of around 30-35 from the thruster axis. Characterization of the DCFT has heretofore involved only one magnetic topology. It is then the purpose of this study to investigate changes to the near-field plume caused by altering the shape and strength of the magnetic field. A thick magnetic collar, encircling the thruster body, is used to lower the field strength outside of the discharge chamber and thus lessen any effects caused by the external field. Changes in the thruster plume with field topology are monitored by the use of normal Langmuir and emissive probes interrogating the near-field plasma. Results are related to other observations that suggest a unified conceptual framework for the important near-exit region of the thruster.en
dc.publisherAmerican Institute of Aeronautics and Astronautics (AIAA)en
dc.relation.urlhttp://arc.aiaa.org/doi/abs/10.2514/6.2010-7104en
dc.titleMagnetic Field Effects on the Plume of a Diverging Cusped-Field Thrusteren
dc.typeConference Paperen
dc.contributor.departmentElectrical Engineering Programen
dc.identifier.journal46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibiten
dc.conference.date25-28 July, 2010en
dc.conference.name46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibiten
dc.conference.locationNashville, TNen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionMassachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge MA, 02139, USAen
kaust.authorBecker, Nicholas Michaelen
kaust.authorMartinez-Sanchez, Manuelen
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