DOW-UAP-D145, AAWSAP DIRD, הנעת היתוך אנייטרונית I, נובמבר 2010

Aneutronic Fusion Propulsion
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Contents
Comparison of Specific Impulse for Various Rocket Designs .............................. 5
Chapter 5: Aneutronic Fusion Propulsion Projects............................................... 21
Chapter 6: Speculation on Research Needs Over the Next 30 Years ..................... 25
ii

LEO to the Moons of Jupiter and Saturn (460 to 940 million miles) .................. 28
LEO to Alpha Centauri (4.22 light-years or 24.8 trillion miles) ......................... 28
Figures
Figure 2. Mass Ratio Increases as Objects Approach Speed of Light ................ 2
Figure 3. Spherical Radiation Shield Surrounding Point Source ....................... 8
Figure 5. Schematic Design of a Magnetohydrodynamic (MHD) Generator ..... 13
Figure 6. Nuclear Fusion of Deuterium and Tritium ....................................... 14
Figure 8. Fusion Ignition Energies for D-T, D-D, and D-He3 ........................... 15
Figure 10. Fusion of Hydrogen-1 and Boron-11 Produces 3 Alpha Particles .. 19
Figure 12. Time Dilation at Relativistic Velocities .......................................... 31
Figure 13. Maximum Achievable Velocity Versus Fuel Usage ......................... 33
Figure 14. Acceleration and Rocket "Clock" Ratio Vs Mission Time on Earth .. 33
Figure 15. Spreadsheet for Sample Mission to Alpha Centauri........................34
iii

Aneutronic Fusion Propulsion
Introduction
Space exploration is limited by existing propulsion technology. Up to now, chemical
rockets have been used to reach low-Earth orbit, the Moon, and the outer regions of the
solar system. Chemical rockets can use either solid or liquid fuel. Regardless of the
type of fuel, their design is similar to that shown in Figure 1. Oxygen is combined with
hydrogen or a hydrocarbon fuel in a combustion chamber where high temperatures and
pressures cause the exhaust to be ejected through a supersonic nozzle to provide
thrust to the rocket. The momentum of the fuel ejected through the nozzle provides
the force or thrust that accelerates the rocket forward.
There are many variations of chemical rockets, but they all suffe…