Orbit Simulations
49.……….Operational Magsails with Payload Ratio = 1.0: 49.……….Orbit (Constant Alpha) 50.……….Orbit ( Maximum Current) 51.……….Time vs. Distance ( Maximum Current) 52.……….Orbit (Maximum Current, Pumped) 53.……….Time vs. Distance ( Maximum Current, Pumped) 54.……….Orbit ( Maximum Current, Modified Pumping) 55.……….Time vs. Distance ( Max. Current, Modified Pumping) 56.……….Time vs. Average Speed (for Previous Three Maximum Current Cases) 57.……….Distance vs. Average Speed (for Previous Three Maximum Current Cases) 58.……….Payload Ratio vs. Apoapsis Distance for Operational Magsail (pumped vs. non-pumped
Cases)
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59.……….Orbit of Demonstrator Magsail (Maximum Current, Pumped) 60.……….Time vs. Distance of Demonstrator Magsail ( Maximum Current, Pumped 61.…….Operation
in Solar Wind Environment
61.……….Streamlines in the Heliosphere 62.……….Streamlines in the Heliosphere – Closeup 63.……….Time vs. Distance of Advanced Magsail – Assuming 100 AU Termination Shock 64.……….Time vs. Average Speed of Advanced Magsail – Assuming 100 AU Termination Shock 65….…….Normal Interaction with Solar wind 66….…….Voyager 2 Solar Wind Density and Speed 67.……….Solar Wind Average Speed Vs. Heliographic Latitude (Ulysses) 68.……….Solar Wind Average Speed Vs. Heliographic Latitude (Ulysses/Swoops) 68.………. Interaction with Solar Flares 69.………. Solar Wind Pressure Compared to Magsail Magnetic Pressure 70.………. Transient Operation Near Sun 71.……. The
Magsail as an Interstellar Mission Brake
71….……. Performance of Near-Term Interstellar Mission Brake 72.………. Performance of Highly Advanced Interstellar Mission Brake 72.……. Proposed 73
Magsail Experimental Program
Conclusions
74.…….References
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Introduction:
The magnetic sail or magsail, is a device which can be used to accelerate or decelerate a spacecraft by using a magnetic field to accelerate/deflect the plasma naturally found in the solar wind and interstellar medium. Its principle of operation is as follows: A loop of superconducting cable perhaps tens of kilometers in diameter is stored on a drum attached to a payload spacecraft. When the time comes for operation, the cable is played out and a current is initiated in the loop. This current once initiated, will be maintained indefinitely in the superconductor without further power. The magnetic field created by the current will impart a hoop stress to the loop aiding the deployment and eventually forcing it to a rigid circular shape. The loop operates at low field strengths, typically 0.0001 Tesla, so little structural strengthening is required. The loop can be positioned with its dipole axis at any angle with respect to the plasma wind, with the two extreme cases examined for analytical purposes being the axial configuration, in which the dipole axis is parallel to the wind, and the normal configuration, in which the dipole axis is perpendicular to the wind. A magsail with payload is depicted in Fig. 1.

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