A RICH multiplicity veto for the HERA-B experiment

Author

Husemann, U. ; Adams, M. ; Boker, M. ; Brüggemann, M. ; Cruse, C. ; Buchholz, P. ; Kolotaev, Y.

Author_Institution

Fachbereich Phys., Siegen Univ., Germany

Volume

1

fYear

2002

fDate

10-16 Nov. 2002

Firstpage

215

Abstract

We present the design and commissioning of a new multiplicity veto for the HERA-B experiment, a fixed-target spectrometer originally designed to study B meson physics in proton-nucleon interactions. The HERA-B trigger is a message-driven multi-level track trigger. The first level trigger (FLT) consists of custom-made electronics, and the higher trigger levels are implemented as PC farms. The RICH multiplicity veto has been designed to reject high-multiplicity events before they enter the trigger chain. A veto signal is generated based on the comparison of the number of photons in parts of the HERA-B ring-imaging Cerenkov hodoscope (RICH) with a programmable threshold.

Keywords

Cherenkov counters; high energy physics instrumentation computing; microcomputer applications; particle spectrometers; spectroscopy computing; trigger circuits; HERA-B experiment; PC farms; RICH multiplicity veto; first level trigger; fixed-target spectrometer; high-multiplicity events; programmable threshold; ring-imaging Cerenkov hodoscope; veto signal; Current measurement; Detectors; Mesons; Particle beams; Physics; Power capacitors; Signal generators; Spectroscopy; Target tracking; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record, 2002 IEEE

Print_ISBN

0-7803-7636-6

Type

conf

DOI

10.1109/NSSMIC.2002.1239302

Filename

1239302