A prototype ROI builder for the second level trigger of ATLAS implemented in FPGA's.

Conference · Tue Dec 07 04:00:00 EST 1999

OSTI ID:750616

Blair, R E; Dawson, J W; Haberichter, W N; Schlereth, J L

In an effort to reduce data transfer and rate requirements, the Higher Level Trigger of the ATLAS Detector uses Region of Interest (ROI) information forwarded from Level 1 Partitions on a Level 1 Accept. The ROI Builder receives these ROI fragments, which may be considerably skewed in time and may be interspersed with fragments from other events, organizes and formats from these fragments a record for each event accepted by Level 1, selects a processor to manage the event, and transfers via S-link the assembled ROI record to the target processor. The ROI Builder must fulfill these requirements at the Level 1 Trigger rate of 100 kHz while accommodating S-link flow control. A design for the ROI Builder was developed emphasizing parallelism, implemented in FPGA's, and has been run in testbeds at Saclay and CERN.

• Research Organization: Argonne National Lab., IL (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 750616
• Report Number(s): ANL-HEP-CP-99-118
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CERN LHC
DATA ACQUISITION SYSTEMS
DATA TRANSMISSION
DESIGN
RADIATION DETECTORS
TRIGGER CIRCUITS