Abstract
The main goal of the NA62 experiment at CERN is to measure the branching ratio of the ultra-rare K+→π+νν̄ decay, collecting about 100 events to test the Standard Model of Particle Physics. Readout uniformity of sub-detectors, scalability, efficient online selection and lossless high rate readout are key issues. The TDCB and TEL62 boards are the common blocks of the NA62 TDAQ system. TDCBs measure hit times from sub-detectors, TEL62s process and store them in a buffer, extracting only those requested by the trigger system following the matching of trigger primitives produced inside TEL62s themselves. During the NA62 Technical Run at the end of 2012 the TALK board has been used as prototype version of the L0 Trigger Processor.
Highlights
The rate on main detectors will be about 10 MHz. The L0 will be implemented in the common TEL62 board (see section 3.1) and will be used to reduce the total rate to under 1 MHz using information coming from fast detectors: the charged hodoscope (CHOD) and the RICH as positive elements, the muon veto (MUV) and the photon vetoes (LKr, LAV) as negative ones
An overall event time resolution of about 100 ps is required to avoid the mismatch between a pion and a beam particle and a resulting wrong missing mass
The L0 will be implemented in the common TEL62 board and will be used to reduce the total rate to under 1 MHz using information coming from fast detectors: the charged hodoscope (CHOD) and the RICH as positive elements, the muon veto (MUV) and the photon vetoes (LKr, LAV) as negative ones
Summary
The rate on main detectors will be about 10 MHz. The L0 will be implemented in the common TEL62 board (see section 3.1) and will be used to reduce the total rate to under 1 MHz using information coming from fast detectors: the charged hodoscope (CHOD) and the RICH as positive elements, the muon veto (MUV) and the photon vetoes (LKr, LAV) as negative ones. 3.1 TEL62 The TEL62 board (see figure 3) is the common FPGA-based motherboard for trigger generation and data acquisition of the NA62 experiment.
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