p-CARBON Cni Polarimeters at Bnl:. the Fastest Physics Setup in the World

Recent years of polarized proton running at BNL have proved the effectiveness of using the analyzing power of pC elastic scattering in the CNI region for proton beam polarimetry. Excellent performance of the polarimeters at both RHIC and AGS allowed fast and detailed beam polarization studies, including polarization loss, during the accelerator ramp, profile measurements, and spin rotation. Based on the latest achievements of digital electronics, the DAQ system uses signal waveform processing in FPGA crystals, and allows on-the-flight selection of up to 500 million elastic pC events per second with no dead time. Principles of operation of the polarimeters and of the DAQ system are presented, together with selected performance examples.