Overview of the effects of neutral gas releases on high-voltage sounding rocket platforms

Details Overview of the effects of neutral gas releases on high-voltage sounding rocket platforms Overview of the effects of neutral gas releases on high-voltage sounding rocket platforms

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..15...83b&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 15, no. 12, p. (12)83-(12)86

Computer Science

Sound

3

Electrical Grounding, Gas Discharges, Neutral Gases, Plasma Potentials, Rocket Sounding, Sounding Rockets, Space Platforms, Spacecraft Charging, Argon, Nitrogen, Outgassing, Payloads, Spacecraft Performance

Scientific paper

Four recent sounding rocket experiments demonstrate that the release of neutral gas from both positively and negatively charged vechicles returns the vehicle potential to near the plasma potential. Early active experiment payloads, CHARGE-2 and Space Power Experiments Aboard Rockets 1 (SPEAR-1) observed enhanced currents from/to the vehicles during unplanned attitude thruster firings. The follow-on CHARGE-2B ad SPEAR-3 payloads directly measured the changes to the vehicle potential caused by both planned argon and unplanned nitrogen releases. The gas releases from positively charged CHARGE-2B consistently reduced the potential to 20-50 V, wheras the gas releases from negatively charged SPEAR-3 brought the potential to between -200 and -500 V. The difference in grounding levels for positively and negatively charged payloads suggests that the gas responsible for grounding is near the vehicle, within a small fraction of the sheath size.

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