Patent ID: 8736806

Claim:
A lithographic apparatus comprising: a radiation system for providing a beam of radiation from radiation emitted by a radiation source, the radiation system having a rotation contaminant trap arranged in the path of the radiation beam to trap material emanating from the radiation source, the rotation contaminant trap having a multiple number of elements extending in a radial direction from a common rotation trap axis and being arranged to allow contaminant material emanating from the radiation source to deposit during propagation of the radiation beam, and a contaminant catch configured to receive contaminant material particles from the multiple number of elements and to collect the contaminant material particles, wherein the contaminant catch comprises a profile having side portions extending substantially mutually parallel and in the radial direction with respect to the common rotation trap axis and a radial end portion interconnecting the side portions, and wherein the radial end portion of the profile is movable in the radial direction; an illumination system configured to condition the radiation beam; a support constructed to support a patterning device, the patterning device being capable of imparting the radiation beam with a pattern in its cross-section to form a patterned radiation beam; a substrate table constructed to hold a substrate; and a projection system configured to project the patterned radiation beam onto a target portion of the substrate.