Force-dome
this was a localized form of defensive shielding, created during the last decades of the Old Republic as a security system for remote outposts. The force-dome used a collection crystals - not unlike those used in the construction of a lightsaber - to generate a hemisphere of protective energy. Its size could be modulated by the amount of power and the number of crystals used, but was usually limited to a few square miles in surface area. The shield produced by the force-dome ws capable of repelling even the heaviest of projectile weapons, but coyuld eventually be pierced by ion-type weapons.