FPGA-based trigger system for the Fermilab SeaQuest experiment

Shiuan-Hal Shiu; Jinyuan Wu; Randall Evan McClellan; Ting-Hua Chang; Wen-Chen Chang; Yen-Chu Chen; Ron Gilman; Kenichi Nakano; Jen-Chieh Peng; Su-Yin Wang

doi:10.1016/j.nima.2015.09.001

arXiv · 1509.04864

FPGA-based trigger system for the Fermilab SeaQuest experiment

Shiuan-Hal Shiu·Jinyuan Wu·Randall Evan McClellan·Ting-Hua Chang·Wen-Chen Chang·Yen-Chu Chen·Ron Gilman·Kenichi Nakano·Jen-Chieh Peng·Su-Yin Wang

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Abstract

The SeaQuest experiment (Fermilab E906) detects pairs of energetic μ+ and μ- 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.

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Shiuan-Hal Shiu, Jinyuan Wu, Randall Evan McClellan, Ting-Hua Chang, Wen-Chen Chang, Yen-Chu Chen, Ron Gilman, Kenichi Nakano, Jen-Chieh Peng, Su-Yin Wang. 2015-09-16. FPGA-based trigger system for the Fermilab SeaQuest experiment. https://doi.org/10.1016/j.nima.2015.09.001

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