Magnetic Containment Field
this device is used to protect landing pads and starports which operate in the vacuum of space. The magcon field, as it is often referred to, creates a field of magnetic energy that is semi-permiable. Atmosphere in the landing area is contained within the field, so that it doesn't escape out into the vacuum of space. However, it is incapable of maintaining the heat of the landing area, which seeps through the containment field and into space. Slow-moving starships can pass through it without breaking the field's integrity.