Journal article

THE CHAOS 2ND LEVEL TRIGGER - A FAST, PROGRAMMABLE ECL TRIGGER FOR A MAGNETIC SPECTROMETER USING MULTIWIRE PROPORTIONAL CHAMBERS

KJ RAYWOOD, SJ MCFARLAND, PA AMAUDRUZ, GR SMITH, ME SEVIOR

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | ELSEVIER SCIENCE BV | Published : 1995

Abstract

A versatile second level trigger has been developed for the CHAOS facility at TRIUMF using fast ECLine trigger modules augmented by some specially constructed modules. It consists of a primary stage and two optional secondary stages. The primary track finding stage is capable of making a decision based on track vertex, polarity and momentum. The next stage is able to reject events based on the correlation between track momentum and scattering angle. The third stage can make a cut on the sum of the momenta of two tracks. In addition there is an extra parallel stage that is responsible for ensuring that the beam particle has the correct incoming trajectory. All stages are programmable and, dep..

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University of Melbourne Researchers