Pulsed laser propulsion for low cost, high volume launch to orbit
Pulsed laser propulsion offers the prospect of delivering high thrust at high specific impulse (500-1000 seconds) from a very simple thruster, using the energy of a remote ground-based laser to heat an inert propellant. Current analyses indicate that payloads of approximately 1 kg per megawatt of average laser power can be launched at a rate of one payload every 15 minutes and a marginal cost of $20 to $200 per kg. A 20 MW entry-level launch system could be built using current technology at a cost of $500 million or less; it would be capable of placing 600 tons per year into LEO. The SDIO Laser Propulsion Program has been developing the technology for such a launch system since 1987. The program has conducted theoretical and experimental research on a particular class of laser-driven thruster, the planar double-pulse LSD-wave thruster, which could be used for a near-term launcher. The double-pulse thruster offers several advantages, including extreme simplicity, design flexibility, and the ability to guide a vehicle remotely by precise control of the laser beam. Small-scale experiments have demonstrated the operation of this thruster at a specific impulse of 600 seconds and 10% efficiency; larger experiments now under way are expected to increase this to at least 20% efficiency. Systems-level issues, from guidance and tracking to possible unique applications, have also been considered and will be briefly discussed. There appear to be no fundamental obstacles to creating, in the next five to ten years, a new low-cost ''pipe-line to space.'' 7 refs., 2 figs., 1 tab.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5978932
- Report Number(s):
- UCRL-101139; CONF-8906169-1; ON: DE89014049
- Resource Relation:
- Conference: International Astronautics Federation conference on space power, Cleveland, OH, USA, 5-7 Jun 1989; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
PROPULSION
LASER POWER TRANSMISSION
SPACE VEHICLES
CARBON DIOXIDE LASERS
COST
PROPELLANTS
SPACE TRANSPORT
TECHNOLOGY ASSESSMENT
TELEMETRY
TELESCOPES
COMMUNICATIONS
DATA TRANSMISSION
GAS LASERS
LASERS
POWER TRANSMISSION
TRANSPORT
VEHICLES
NESDPS Office of Nuclear Energy Space and Defense Power Systems
320201* - Energy Conservation
Consumption
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420300 - Engineering- Lasers- (-1989)