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Feasibility study into the use of mechanical choppers to alter the natural time structure of the APS

In a very general way, one can divide time-resolved experiments into two broad classes: (1) those that take advantage of techniques that permit data to be collected in a more rapid fashion and (2) those that take advantage of the natural time-structure or modulation of the radiation produced by storage ring sources. It is with the latter group of experiments that this report is primarily concerned. Researchers planning to use the time structure are considering both experiments that can be cyclically pumped and probed. The natural time-structure of the storage ring may not, unfortunately, be optimal for all time-resolved experiments.