  At the dawn of a new space exploration age, aiming to send humans back to the
Moon and for the first time to Mars, it is necessary to devise a solution to
mitigate the impact that space radiation has on spacecraft and astronauts.
Although technically challenging, active magnetic shielding is generally
considered a promising solution. We propose a lightweight deployable system
producing an open magnetic field around a space habitat. Our Cosmic Radiation
Extended Warding (CREW) system consists of a cylindrical Halbach array coil
arrangement, or Halbach Torus (HaT). This configuration generates an enhanced
external magnetic field while suppressing it in the habitat volume. The CREW
HaT takes advantage of recent innovations in high-temperature superconductors
(e.g., ReBCO) that enables the needed high currents. We present a preliminary
feasibility design of the magnetic shielding system and its collapsible
mechanical structure to sustain the internal magnetic forces while protecting
astronauts. We also lay down the next steps towards a more evolved and
comprehensive device design.
