Abstract

A combined laser-synchrotron photoemission experiment has been constructed on the Naval Research Laboratory soft X-ray beam line on the X-ray ring at the NSLS, Brookhaven National Laboratory. A pulsed copper vapor laser operating at 6 kHz is currently incorporated. The instrumentation is based on a time-to-digital converter and simultaneously records spectra for all times within a data window tens of microseconds in duration. A resolution of ∼ 2 ns is achieved when the ring is operated in single bunch mode and the laser and synchrotron are synchronized in time. When the laser is free running, resolution is determined by transit time spread in the cylindrical mirror analyzer, which has been measured directly. Examples of performance based on transient laser-induced photovoltages on silicon surfaces are given.

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