摘要： The SeaQuest experiment (Fermilab E906) detects pairs of energetic + and - produced in 120 GeV/c proton-nucleon interactions in a high rate environment. The trigger system consists of several arrays of scintillator hodoscopes and a set of field-programmable gate array (FPGA) based VMEbus modules. Signals from up to 96 channels of hodoscope are digitized by each FPGA with a 1-ns resolution using the time-to-digital convertor (TDC) firmware. The delay of the TDC output can be adjusted channel-by-channel in 1-ns steps and then re-aligned with the beam RF clock. The hit pattern on the hodoscope planes is then examined against pre-determined trigger matrices to identify candidate muon tracks. Information on the candidate tracks is sent to the 2nd-level FPGA-based track correlator to find candidate di-muon events. The design and implementation of the FPGA-based trigger system for SeaQuest experiment are presented. 12 pages, 9 figures 出版者： Elsevier BV 出版日期： 2015-12 出處： Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2015-12, Vol.802, p.82-88 識別號： ISSN: 0168-9002 識別號： DOI: 10.48550/arxiv.1509.04864 識別號： DOI: 10.1016/j.nima.2015.09.001
