Physicists Propose Relativistic Electron Beams to Propel Probe to Alpha Centauri

The concept aims to send a 1,000 kg spacecraft to our closest star system within decades using existing technologies and innovative beam physics.

The proposed mission, named 'Sunbeam,' would use relativistic electron beams to propel a spacecraft at up to 10% of the speed of light.
This approach could enable a probe to reach Alpha Centauri, located 4.37 light-years away, in just over 40 years, compared to tens of thousands of years with current propulsion methods.
The method leverages a phenomenon called 'relativistic pinch,' which prevents beam spread and maintains thrust over long distances.
A solar statite, a stationary platform near the Sun, would generate and direct the electron beam, using solar energy and magnetic fields for stability and power.
While the concept is grounded in existing physics, significant technological advancements are required to build the necessary infrastructure and beam capture systems.