Repulsor field
From Wookieepedia, the Star Wars wiki.
Repulsor fields were large energy field projectors that were used on many emplacements and stations set in harsh environments. One large station that used a repulsor field was the Separatist headquarters on Mustafar, because of the dangerous lava rivers and gases that could damage the station.
There was a repulsor field on Coruscant near Ploughtekal Market, where a duel was fought in 18 BBY.
