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          Institute: MPI für Kernphysik     Collection: Heavy Flavour Physics     Display Documents

ID: 28206.0, MPI für Kernphysik / Heavy Flavour Physics
Track finding at 10-MHz hadronic event rate
Authors:Bruinsma, M.; Fleckenstein, H.; Gerndt, E. K. E.; Flammer, J.; Michetti, A.; Negri, I.; Norenberg, M.; Ressing, D.; Riu, I.; Rothe, C.; Somov, A.; Glass, J.; Gropel, A.; Hahnel, C.; Manner, R.; Pernack, R.; Popov, V.; Schwingenheuer, B.
Date of Publication (YYYY-MM-DD):2002-04
Title of Journal:IEEE Transactions on Nuclear Science
Journal Abbrev.:IEEE Trans. Nucl. Sci.
Issue / Number:2
Start Page:347
End Page:356
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Hera-B is a fixed target experiment using a halo target inside the HERA proton ring to generate B mesons in 920 GeV proton- nucleus interactions. The first-level trigger (FLT) (see Table I for a list of the acronyms used in this paper) of the experiment has to reduce the primary 10-MHz input rate by a factor 200 in less than 10 mus to make it acceptable to the second level trigger (SLT). The trigger strategy is based on the tracking of charged particles and on the reconstruction of their kinematic parameters. The combination of track pairs can also be used for the final decision. A parallel and pipelined set of approximately 60 dedicated boards was designed and built to perform this job. In this paper, the working principle of the system and some results obtained by analyzing the data collected during the run in the year 2000 are described.
Free Keywords:first-level trigger (FLT); Hera-B; latency; pretrigger; rate; TDU; TFU; TPU; tracking; trigger
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group W. Hofmann/Heavy Flavour Physics (K. T. Knöpfle, M. Schmelling)
External Affiliations:NIHKEF H, NL-1009 DB Amsterdam, Netherlands; DESY, D-22603 Hamburg, Germany; Univ Mannheim, D-68131 Mannheim, Germany; Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany; ITEP, Moscow, Russia
Identifiers:ISI:000175820900005 [ID No:1]
ISSN:0018-9499 [ID No:2]
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