Bohn, W.L. and Schall, W.O. (2002) Laser Propulsion Activities in Germany. First International Symposium on Beamed Energy Propulsion, Huntsville, Alabama, 5. -7. November 2002.
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Activities related to laser supported propulsion concentrate on investigations of the fundamental phenomena arising from the interaction of high-power CO_2 laser pulses with a simple bell engine. Breakdown dynamics, plasma, and lightcraft accelerations are carefully measured using optical and laser diagnostics. In a first-order approach the expanding plasma can be described by the point explosion model with counterpressure. Wire guided vertical flight experiments in the laboratory have been undertaken and analyzed. Comparative impulse measurements in ambient air and ablated material are presented for a series of experiments performed either at atmospheric pressure or at reduced pressures down to vacuum. Impulse coupling coefficients, average exhaust velocities,specific impulse, and jet efficiencies are derived from the experimental data. The repetitively-pulsed CO_2 laser device used in all experiments shows a potential of achieving 50 kW average power. Finally, long-term perspectives of laser propulsion will be addressed.
|Document Type:||Conference or Workshop Item (Speech)|
|Title:||Laser Propulsion Activities in Germany|
|Event Title:||First International Symposium on Beamed Energy Propulsion, Huntsville, Alabama, 5. -7. November 2002|
|Organizer:||University of Alabama in Huntsville|
|HGF - Research field:||Energy|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||other|
|DLR - Research area:||Energy|
|DLR - Program:||L - no assignement|
|DLR - Research theme (Project):||L - Laser Research and Technology|
|Institutes and Institutions:||Institute of Technical Physics|
|Deposited By:||Dr.rer.nat. Hans-Albert Eckel|
|Deposited On:||16 Sep 2005|
|Last Modified:||06 Jan 2010 14:50|
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