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Title: FPGA-based Trigger System for the Fermilab SeaQuest Experimentz

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 we used 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 step 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. Finally, 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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [4] ;  [4] ;  [5] ;  [6] ;  [3] ;  [7]
  1. Academia Sinica, Taipei (Taiwan); National Central Univ., Taoyuan City (Taiwan)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Univ. of Illinois, Urbana-Champaign, IL (United States)
  4. Academia Sinica, Taipei (Taiwan)
  5. State Univ. of New Jersey, Piscataway, NJ (United States)
  6. Tokyo Inst. of Technology (Japan)
  7. Academia Sinica, Taipei (Taiwan); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); National Kaohsiun Normal Univ., Kaohsiung County (Taiwan)
Publication Date:
OSTI Identifier:
1223257
Report Number(s):
FERMILAB-PUB--15-391-E
Journal ID: ISSN 0168-9002; arXiv eprint number arXiv:1509.04864
Grant/Contract Number:
AC02-07CH11359
Type:
Accepted Manuscript
Journal Name:
Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
Additional Journal Information:
Journal Volume: 802; Journal ID: ISSN 0168-9002
Publisher:
Elsevier
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY trigger; FPGA firmware; TDC; muon pairs