A 40 MHz-pipelined trigger for K-0 -> 2 pi(0) decays for the CERN NA48 experiment

Citation
G. Fischer et al., A 40 MHz-pipelined trigger for K-0 -> 2 pi(0) decays for the CERN NA48 experiment, NUCL INST A, 419(2-3), 1998, pp. 695-700
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
0168-9002 → ACNP
Volume
419
Issue
2-3
Year of publication
1998
Pages
695 - 700
Database
ISI
SICI code
0168-9002(199812)419:2-3<695:A4MTFK>2.0.ZU;2-7
Abstract
The "neutral" trigger system for the selection of K-o --> 2 pi(o) --> 4 gam ma decays of the NA48 CP-violation experiment is described. The trigger sys tem has been implemented in a 40 MHz "dead-time free" pipeline to allow lar ge rate reduction and high-trigger efficiency. The trigger decision is base d on the information from 13340 cells of the electro-magnetic calorimeter. Every 25 ns the energy, the centre of gravity, the kaon lifetime and the nu mber of peaks in calorimeter projections are calculated in the trigger. The pipeline system is described and the performance of the trigger during the 1997 data-taking period is discussed. (C) 1998 Published by Elsevier Scien ce B.V. All rights reserved.