High-density power source (HDPS) utilizing decay heat and method thereof

摘要

This invention describes an innovative miniaturized decay-heat engine formed by a closed-loop system powered by the spontaneous decay of radioisotopes emitting alpha particles. Said alpha particles are emitted inside a sealed and reinforced capsule or rod whose surfaces reach a relatively high temperature as a result of the capture of the alpha particles in the inner shell of said capsule. Radiation shielding is not a significant problem since alpha radiation is stopped by the materials encasing the capsule. The cladding material covering the alpha capsule or rod acts as the thermal interface and the radiation shield at the same time. This invention provides a power source for time duration significantly longer than any power system powered by fossil fuels with minimum weight. The unit is assembled in an ultra-compact package providing power from a few months to several years without need for refueling.