Analysis of chamber simulations of long probes in high-speed, dense plasmas

Brian E. Gilchrist, Sven G. Bilen, Alec D. Gallimore

Research output: Contribution to conferencePaper

1 Citation (Scopus)

Abstract

We describe chamber tests of simulated electrodynamic tethers (EDTs) of different geometries operating in a dense, high-speed plasma. The geometries tested and described here were cylindrical and flat-ribbon. Several important conclusions that can be drawn from the tests are as follows: the currents collected by cylinder are close to what would be predicted via orbital-motion-limited (OML) current collection theory. The tape tether had comparable current levels to a theoretical equal area OML cylinder collector. However, I-V behavior clearly is different at nearest distances (~ 16 Ad tape width) as compared to furthest test distances (~ 6 \D tape width). The tape tether did better than a theoretical equal mass solid cylinder. A knee in the I-V curves can be seen in the tape data at a potential that is near the estimated Below this knee the current increases rapidly as voltage is increased. Above the knee the current increases at a rate near that expected from OML current-collection models depending on the relative width. This likely is an example of high-speed plasma flow effect. Perpendicular tape orientation performed slightly better than parallel.

Original languageEnglish (US)
StatePublished - Dec 1 2001
Event39th Aerospace Sciences Meeting and Exhibit 2001 - Reno, NV, United States
Duration: Jan 8 2001Jan 11 2001

Other

Other39th Aerospace Sciences Meeting and Exhibit 2001
CountryUnited States
CityReno, NV
Period1/8/011/11/01

Fingerprint

dense plasmas
Tapes
tapes
chambers
probe
high speed
Plasmas
plasma
probes
simulation
geometry
electrodynamics
orbits
test chambers
Plasma flow
Geometry
Electrodynamics
magnetohydrodynamic flow
accumulators
ribbons

All Science Journal Classification (ASJC) codes

  • Space and Planetary Science
  • Aerospace Engineering

Cite this

Gilchrist, B. E., Bilen, S. G., & Gallimore, A. D. (2001). Analysis of chamber simulations of long probes in high-speed, dense plasmas. Paper presented at 39th Aerospace Sciences Meeting and Exhibit 2001, Reno, NV, United States.
Gilchrist, Brian E. ; Bilen, Sven G. ; Gallimore, Alec D. / Analysis of chamber simulations of long probes in high-speed, dense plasmas. Paper presented at 39th Aerospace Sciences Meeting and Exhibit 2001, Reno, NV, United States.
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Gilchrist, BE, Bilen, SG & Gallimore, AD 2001, 'Analysis of chamber simulations of long probes in high-speed, dense plasmas', Paper presented at 39th Aerospace Sciences Meeting and Exhibit 2001, Reno, NV, United States, 1/8/01 - 1/11/01.

Analysis of chamber simulations of long probes in high-speed, dense plasmas. / Gilchrist, Brian E.; Bilen, Sven G.; Gallimore, Alec D.

2001. Paper presented at 39th Aerospace Sciences Meeting and Exhibit 2001, Reno, NV, United States.

Research output: Contribution to conferencePaper

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AU - Gilchrist, Brian E.

AU - Bilen, Sven G.

AU - Gallimore, Alec D.

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N2 - We describe chamber tests of simulated electrodynamic tethers (EDTs) of different geometries operating in a dense, high-speed plasma. The geometries tested and described here were cylindrical and flat-ribbon. Several important conclusions that can be drawn from the tests are as follows: the currents collected by cylinder are close to what would be predicted via orbital-motion-limited (OML) current collection theory. The tape tether had comparable current levels to a theoretical equal area OML cylinder collector. However, I-V behavior clearly is different at nearest distances (~ 16 Ad tape width) as compared to furthest test distances (~ 6 \D tape width). The tape tether did better than a theoretical equal mass solid cylinder. A knee in the I-V curves can be seen in the tape data at a potential that is near the estimated Below this knee the current increases rapidly as voltage is increased. Above the knee the current increases at a rate near that expected from OML current-collection models depending on the relative width. This likely is an example of high-speed plasma flow effect. Perpendicular tape orientation performed slightly better than parallel.

AB - We describe chamber tests of simulated electrodynamic tethers (EDTs) of different geometries operating in a dense, high-speed plasma. The geometries tested and described here were cylindrical and flat-ribbon. Several important conclusions that can be drawn from the tests are as follows: the currents collected by cylinder are close to what would be predicted via orbital-motion-limited (OML) current collection theory. The tape tether had comparable current levels to a theoretical equal area OML cylinder collector. However, I-V behavior clearly is different at nearest distances (~ 16 Ad tape width) as compared to furthest test distances (~ 6 \D tape width). The tape tether did better than a theoretical equal mass solid cylinder. A knee in the I-V curves can be seen in the tape data at a potential that is near the estimated Below this knee the current increases rapidly as voltage is increased. Above the knee the current increases at a rate near that expected from OML current-collection models depending on the relative width. This likely is an example of high-speed plasma flow effect. Perpendicular tape orientation performed slightly better than parallel.

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Gilchrist BE, Bilen SG, Gallimore AD. Analysis of chamber simulations of long probes in high-speed, dense plasmas. 2001. Paper presented at 39th Aerospace Sciences Meeting and Exhibit 2001, Reno, NV, United States.