A radiation source is configured to generate extreme ultraviolet radiation. The radiation source includes a fuel supply configured to supply a fuel to a plasma formation site; a laser configured to emit a beam of radiation to the plasma formation site so that a plasma that emits extreme ultraviolet radiation is generated when the beam of radiation impacts the fuel; a fuel particulate interceptor constructed and arranged to shield at least part of the radiation source from fuel particulates that are emitted by the plasma, the fuel particulate interceptor comprising a first portion and a second portion, the second portion being positioned closer to the plasma formation site than the first portion, and the first portion being rotatable; and a fuel particulate remover constructed and arranged to remove fuel particulates from a surface of the fuel particulate interceptor and to direct the fuel particulates towards a collection location.