1 Possibilities for Traveling to Mars Charles C. Renn.

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Presentation transcript:

1 Possibilities for Traveling to Mars Charles C. Renn

2 Topics of Interest Solar Sails Plasma Sails Laser Lightcraft

3 Solar Sails: History ’s Johannes Kelper -1920’s Russian scientists st scientific paper (Garwin, Defense Department consultant with IBM) st Master Thesis (Villers, MIT) & 1 st class UCLA NASA proposal for a rendezvous with Halley’s comet

4 How Does It Work? -general concepts of photons transferring momentum -S.S. is launched (Volna) into space and deploys highly reflective sails -Sails reflect photons from sunlight, gradually accelerating sails (NOT FROM SOLAR WINDS) -F(sunlight) = 1e3 to 1e5 * F(solar wind) -Individual blades rotate to change velocity

5 Materials -Cosmos-1 (launch early ’04, funded by The Planetary Society and Cosmos Studios) – 5-micron thin aluminized Mylar –8 -15m blades, total area = 600m^2 –Solar powered electronics - GPS, cameras, sun sensors

6 Uses -Mars Transportation? – one way trip = 400 days, slow increasing acceleration -Advantages – rendezvous with comets, provide roundtrip transportation of heavy payloads with ease -Ideal for large masses over great distances -Interstellar Travel? – lasers instead of photons -Cosmos-1 animationanimation

7 Plasma Sails Concept -Use of magnetosphere to reflect solar wind to apply force to space craft,. Ex heliopause & interstellar medium -Magnetic cloud to be km radius (similar to ion gyro- radius) -Accelerate kg payload to km/s

8 Components -magnetic field on spacecraft ~ 700G -Plasma injected from spacecraft to inflate magnetic field -Power source to power magnetic field and plasma

9 Plasma Pressure -Helium or Argon heated by power source, becomes plasma -Injected into magnetic field supported by solenoid coils on spacecraft -Pressure causes both the plasma and magnetic field to expand -Potentially expands to needed km

10 Uses -Mars – possibility once technology develops, provide low cost to Mars orbital -Heliosphere – analyze interactions with the interstellar medium (10 - yr trip)

11 Laser Lightcraft: History -1970’s US Missile Defense System – used high powered lasers Myrabo develops 1 st lightcraft st successful flight with no onboard engine lightcraft flies 233ft

12 How It Works -Carbon dioxide laser – ground based laser, rapidly pulsed, creating thrust -Parabolic mirror – focuses beam into ring shaped absorption chamber - (heats air to 5 times T(sun)) -Absorption chamber – inlet air directed to chamber, air then heated by beam, expands, propels lightcraft -Onboard Hydrogen – used when atm. is too thin to provide enough air -Lightcraft stabilizes by spinning rapidly.rapidly -Ex - similar to how a football spins rapidly when thrown with accuracy

13 Material -the model – aircraft-grade aluminum -Full size – silicon carbide

14 Uses -Mars – possibility -Satellite launch services -Parcel delivery -Advantages - high thrust, simplicity, reliability (few moving parts) -Limits – power available, absorption/distortion through atm.

15 Conclusion -Technology -Funding -Creativity