Damping device for a gas turbine combustor

Damping device for a gas turbine combustor, comprising a wall with a first inner wall and a second outer wall, arranged in a distance to each other, wherein said inner wall is subjected to high temperatures on a side with a hot gas flow, a plurality of cooling channels extending essentially parallel between the first inner wall and the second outer wall, and at least one damping volume bordered by cooling channels, a first passage for supplying a cooling medium from a cooling channel into the damping volume and a neck passage for connecting the damping volume to the combustion chamber, an end plate fixed to the inner wall, separating the damping volume from the combustion chamber, said end plate is provided with the neck passage, and additionally provided with at least one feed plenum for the cooling medium, at least one exit plenum for the cooling medium and at least one cooling passage enabling a flow of cooling medium from the at least one first feed plenum to a second feed plenum or to the at least one exit plenum.