Parisi Team Deflects 20% of Solar Particles With 1,482 Permanent Magnets
Updated
Updated · Universe Today · Jul 9
Parisi Team Deflects 20% of Solar Particles With 1,482 Permanent Magnets
3 articles · Updated · Universe Today · Jul 9
Summary
A 1-square-meter array of 1,482 neodymium permanent magnets deflected about 20% of simulated solar-particle protons in the 0.1-10 MeV range, according to a new arXiv preprint.
The modeled shield weighs under 300 kg and needs no power or cryogenic cooling, positioning it as a lighter, more failure-resistant alternative to water shielding or superconducting magnets for deep-space crews.
Its protection is limited: the magnetic field mainly pushes aside lower-energy protons, lets higher-energy particles pass, and does little against galactic cosmic rays arriving from many directions.
The team also flagged risks from secondary radiation when protons strike the magnets and from long-term demagnetization, and plans Monte Carlo simulations to test whether permanent magnets could fit into a hybrid shielding system.
If this shield fails against cosmic rays, is it a dead end for protecting astronauts on a Mars mission?
Are we closer to making humans radiation-resistant than we are to building a perfect shield for spacecraft?
Permanent Magnets Block 20% of Solar Particle Radiation: Toward Layered Astronaut Protection in Deep Space
Overview
Deep-space missions face serious risks from intense solar particle events, which send streams of energetic charged particles beyond Earth's protective magnetosphere. Traditionally, heavy materials like aluminum or water have been used to shield astronauts, but this method is limited by weight and high launch costs. A recent breakthrough shows that permanent magnets can partially deflect solar radiation, offering a lighter, power-free alternative. While this magnetic shielding is not a complete solution, it can be integrated with other methods in a layered defense system, helping to reduce radiation exposure and improve astronaut safety on future missions.