Prospects of Infrared Lasers in Air-Breathing Electric Thrusters

The results of studies on the use of solid-state infrared lasers in combination with special targets for obtaining primary electrons in ionization chambers of plasma-ion thrusters are presented. Such thrusters being equipped with free molecular air intakes for using the surrounding atmosphere as a propellant for air-breathing electric thrusters, which are highly efficient for long-term maintenance of spacecraft in ultra-low orbits, providing significant advantages in Earth remote sensing and telecommunications. It is shown that the method of electron emission proposed can be an alternative to the current-heated cathodes used today, significantly increasing their lifetime.