Using the Useless: Laser Propulsion Unit for Post-Mission Disposal using a Launch Adapter as Propellant Material

We would like to address the growing task of space debris mitigation. For this purpose, we analyze the potential performance of laser-ablative propulsion using the launch adapter as propellant material. This might lead to a solution for end-of-life applications of spacecraft. As a suitable sample laser system for space-based operation, we refer to an AEOLUS-like laser configuration, which would be capable of generating 0.9 mN of thrust at a specific impulse of 3000 s from aluminum as propellant. Simulations showing the possible capability of de-orbiting a 800 kg satellite from a 700 km orbit in 3.8 years under the use of 3.9 kg propellant. In addition, a first concept of the propulsion unit is drafted, including a foldable boom to guide the laser beam to the launch adapter. Moreover, we give an outlook on in-orbit material processing options to improve the burn-up of structures, which are problematic for demise with the potential to reduce the risk of debris reaching the ground.