The muon pretrigger system of the HERA-B experiment

Author

Adams, M. ; Buchholz, P. ; Cruse, C. ; Koch, N. ; Kolander, M. ; Kolotaev, I. ; Riege, H. ; Schütt, J. ; Schwenninger, B. ; van Staa, R. ; Wegener, D.

Author_Institution

Inst. fur Phys., Dortmund Univ., Germany

Volume

46

Issue

6

fYear

1999

Firstpage

1982

Lastpage

1988

Abstract

This paper describes the muon pretrigger system of the HERA-B experiment. The muon pretrigger is designed to detect track candidates for muons in order to generate seeds for the first level trigger (FLT) search algorithm. Muons provide the cleanest event signature in the large amount of hadronic background. In order to achieve the required precision the muon pretrigger system has to cope with an interaction rate of about 40 MHz at the HERA bunch crossing rate of 10.4 MHz. This results in a total input data rate of about 10 Gbyte/s. A total rate reduction by a factor of 200 is aimed at by the complete FLT, including the pretrigger systems (electromagnetic calorimeter, muon and high-p/sub T/), within at most 12 /spl mu/s.

Keywords

coincidence techniques; drift chambers; muon detection; nuclear electronics; HERA bunch crossing rate; HERA-B experiment; electromagnetic calorimeter; event signature; first level trigger search algorithm; hadronic background; muon pretrigger system; track candidates; Aging; Algorithm design and analysis; Detectors; Electron beams; Mesons; Particle beams; Physics; Protons; Target tracking; Wires;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.819267

Filename

819267