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Record Details

Record 46 of 2252
Modeling of induced currents from electrodynamic tethers in a laboratory plasma
Author and Affiliation:
Urrutia, J. M.(California Univ., Los Angeles, CA, United States)
Stenzel, R. L.(California, University, Los Angeles, United States)
Abstract: The presently accepted picture of the current path for electrodynamic tethers envisions a quasi-dc current flow in a 'phantom loop' consisting of the tether, two field-aligned current channels into the ionosphere and a cross-field closing current in the E-layer. Predictions are made on the establishment and maintenance of a current loop in space based on observations of time-dependent currents between tethered electrodes in a large laboratory magnetoplasma. In addition to radiation from the contactors ('whistler wings'), the insulated tether is observed to emit waves (a 'whistler wedge'). The 'wedge' provides closure during loop formation by carrying cross-field polarization currents. Whistler spread within the ray cone leads to overlapping of the current wings not far from the tether hence minimizing the role of the ionospheric closure. Maintenance of the loop requires the continuous emission of whistler waves by the entire tether thereby providing severe radiation losses.
Publication Date: Sep 01, 1990
Document ID:
19900065462
(Acquired Nov 28, 1995)
Accession Number: 90A52517
Subject Category: PLASMA PHYSICS
Document Type: Journal Article
Publication Information: Geophysical Research Letters (ISSN 0094-8276); 17; 1589-159
Publisher Information: United States
Contract/Grant/Task Num: NSF ATM-87-02793; NSF PHY-87-13829; NAGW-1570
Financial Sponsor: NASA; United States
Organization Source: California Univ.; Los Angeles, CA, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ATMOSPHERIC MODELS; CURRENT DENSITY; E REGION; MAGNETIC FIELD CONFIGURATIONS; PLASMA CURRENTS; TETHERING; IONOSPHERIC DISTURBANCES; PLASMA CONDUCTIVITY
Imprint And Other Notes: Geophysical Research Letters (ISSN 0094-8276), vol. 17, Sept. 1990, p. 1589-1592.
Availability Source: Other Sources
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