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The user shift average was affected by the increased fill time for the camshaft-fill run last week. Materials scientists have long been interested in using very short pulses of x rays to study phenomena that occur on similarly short time scales. In this arrangement, some of the infrared photons interact with electrons and are scattered. The scattered photons have x-ray energies and travel in the same direction as the electron beam. Downstream from the point of intersection, a bend magnet diverts the electrons so that the x-ray pulses can be directly accessed.