At least one method, apparatus and system for providing a plurality of optical beams, such as EUV beams. A first electron beam is received. The first electron beam is converted into at least a second electron beam and a third electron beam. The second and third second and third electron beams to an undulator. Using the undulator for generating a plurality of output beams using the at least second and third electron beams. The output beams respectively comprises a plurality of optical beam components and a plurality of electron beam component. A first optical beam component of the plurality of optical beam components is provided to a first processing tool.