Conversion of Sub-Millimeter Waves to Gas Flow in Sonic Region

Details Conversion of Sub-Millimeter Waves to Gas Flow in Sonic Region Conversion of Sub-Millimeter Waves to Gas Flow in Sonic Region

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..664..257j&link_type=abstract

BEAMED ENERGY PROPULSION: First International Symposium on Beamed Energy Propulsion. AIP Conference Proceedings, Volume 664, pp

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Spaceborne And Space Research Instruments, Apparatus, And Components, Laser Applications, Ion And Plasma Propulsion

Scientific paper

Study shows potential for efficient energy conversion from sub-millimeter electromagnetic beam to hydrogen or helium gas at sonic and low supersonic speeds. Higher gas enthalpy is possible, compared with subsonic heating, leading to higher specific impulse for propulsion. Electrons driven by the beam E-field are excited to high temperature and transfer energy to the gas by collision. This process is limited to a narrow frequency range by gas breakdown at lower frequencies and low beam attenuation at higher frequencies. Propulsion system design factors, comparing IR vs. sub-millimeter beamed propulsion are discussed.

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