NASA’s Artemis program will send humans back to the Moon as early as 2025. The Earth’s magnetic field has shielded astronauts in Low Earth Orbit from the space radiation environment. Mitigation of space radiation risks to astronaut health is critical for human missions beyond Low Earth Orbit. Currently, all radiation protection is provided by passive shielding whereby suitable materials such as aluminium and polyethylene are placed in between crew and the source of radiation. Such measures have been proven to reduce radiation dose to crew, however, the addition of polyethylene blocks – particularly in already cramped sleeping quarters, begins to reduce the habitable volume inside the spacecraft. In a higher radiation environment, the dimensions of these materials required to effectively protect crew becomes too heavy and bulky to be launched. Alternatively, active shielding involving the generation of electromagnetic fields from electromagnets provides a lightweight solution capable of deflecting charged particles away from spacecraft. We have developed an active radiation shield utilizing electromagnets. The RAdiation Deflector of Ionising Charges by A Lorentz Shield (RADICALS) is a 1U shield comprising 8 electromagnets configured along the edge of a circle. RADICALS is a scale model of a spacecraft whereby the magnetic field is generated within the walls of the spacecraft. RADICALS will launch on a sub-orbital sounding rocket from Sweden in November 2022 to test the effectiveness of the shield against higher energy particles in space. Despite an apogee of only 250 km, launch from within the Arctic Circle will expose the shield to a highly concentrated radiation region of the Earth’s magnetosphere due to proximity to the magnetic pole in the Northern hemisphere. We present here the design of the shield, test results from systems integration with the MASER rocket and GEANT-4 simulations of the response of the shield to space radiation.