An expandable bifurcated stent is formed of a main body and a first branch. The burner configuration is used in a firing installation, in particular a gas turbine combustion chamber, and has a main burner and, disposed centrally within it, a primary pilot burner used for igniting andor for stabilizing the combustion of the main burner. This may improve a processing speed of various communication equipments and their performance. The system can include a detector positioned within and movable relative to the gantry to detect the pulse emitted by the source.