DESIGN AND TESTING OF Gproto BUNCH-BY-BUNCH SIGNAL PROCESSOR

A prototype programmable bunch-by-bunch signal ac- quisition andprocessingchannelwith multipleapplications in storage rings has been developed at SLAC. The process- ing channel supports up to 5120 bunches with bunch spac- ings as close as 1.9 ns. The prototype has been tested and operated in five storage rings: SPEAR-3, DAΦNE, PEP-II, KEKB, and ATF damping ring. The testing included such applications as transverse and longitudinal coupled-bunch instability control, bunch-by-bunchluminosity monitoring, and injection diagnostic. In this contribution the prototype design will be described and its operationwill be illustrated with the data measured at the above-mentioned accelera- tors.