A Spin-Polarised Shield Panel: Radiation Attenuation and Mass Trade for Crewed Transit Vehicles

This paper presents a complete design study of the device is a hull panel of hydrogen-rich polymer whose hydrogen nuclei are maintained in a spin-polarised state, adding a stated torsion-coupled increment to the panel's mass attenuation coefficient for the cosmic-ray dose proxy used in this study, derived from stated assumptions and computed throughout by the accompanying script. A factor-of-two dose reduction requires 13.9 g/cm^2 unpolarised and 13.3 g/cm^2 at a polarised fraction of 0.50, a mass saving of 3.8 percent: real on long transits, negligible on short ones. Every figure in the study is a computed result of the stated model and nothing was built or tested: the study is SIMULATED, NOT MEASURED, and its limits are stated as plainly as its performance.