Blasters are ranged weapons that fire a pulse of coherent plasma, which causes massive damage to organic beings and significantly affects armor.
Blasters move an energetic gas to a chamber where it is heated into plasma, and then a magnetic field pushes it through collimators, which turn the plasma into a coherent pulse of energy. After the collimators, the bolt is accelerated by a magnetic field to a very high velocity.
Blasters can range from small handheld pistols or rifles to the massive blaster cannons utilized on ships.
Energy screens defend against blaster fire by dissipating the bolt before it makes contact with a ship's armour.